Chrysler Cirrus, Dodge Stratus, Plymouth Breeze Haynes. Manual — part 17
3-6
Chapter 3 Cooling, heating and air
conditioning
system
7.21 Install a new 0-ring on the water
inlet pipe (arrow)
pipe (see illustration). Wet the 0-ring with
water to facilitate assembly.
22 Install a new gasket on the water pump
and install the inlet opening over the water
pipe. Press the water pipe into the pump
housing.
23 Install the water pump mounting bolts
and tighten the bolts to the torque listed in
this Chapter's specifications.
24 Install the timing belt (see Chapter 2B).
25
The remainder of installation is the
reverse of removal.
26
Refill the cooling system (see Chapter 1)
and operate the engine to check for leaks.
8
Coolant temperature sending
unit - check and replacement
Warning: Wait until the engine is completely
cool before beginning this procedure.
Check
1
The coolant temperature indicator sys-
tem is composed of a light or temperature
gauge mounted in the dash and a coolant
temperature sending unit mounted on the
engine (see illustration 4.3). On the models
covered by this manual, there is only one
coolant temperature sensor, which functions
as indicator to both the PCM and the instru-
ment panel.
2
If an overheating indication occurs,
check the coolant level in the system and
then make sure the wiring between the light
or gauge and the sending unit is secure and
all fuses are intact.
3
When the ignition switch is turned on
and the starter motor is turning, the indicator
li ght (if equipped) should be on (overheated
engine indication).
4
If the light is not on, the bulb may be
burned out, the ignition switch may be faulty
or the circuit may be open.
5
As soon as the engine starts, the light
should go out and remain out unless the
engine overheats. Failure of the light to go
out may be due to a grounded wire between
the light and the sending unit, a defective
sending unit or a faulty ignition switch. See
Chapter 6 for a diagnostic check of the
coolant temperature switch. Check the cool-
ant to make sure it's the proper type. Note:
Plain water may have too low a boiling point
to activate the sending unit.
Replacement
Warning: Wait until the engine is completely
cool before beginning this procedure.
6
Disconnect the electrical connector
from the sensor.
7
Wrap the threads of the new sensor with
Teflon tape to prevent leaks.
8
Unscrew the sensor. Be prepared for
some coolant spillage (read the Warning in
Section 2).
9
Install the sensor and tighten it securely.
10
Connect the electrical connector.
11
Check the coolant level after the
replacement unit has been installed and top
up the system, if necessary (see Chapter 1).
Check now for proper operation of the gauge
and sending unit. Observe the system for
leaks after operation.
9
Blower motor and circuit - check
and replacement
Warning: These models are equipped with
airbags, always disable the airbag system
before working in the vicinity of the impact
sensors, steering column or instrument panel
to avoid the possibility of accidental deploy-
ment of the airbag, which could cause per-
sonal injury (see Chapter 12).
Check
Refer to illustrations 9.3 and 9.7
1
Check the fuse and all connections in
the circuit for looseness and corrosion. Make
sure the battery is fully charged.
2
Remove the lower right dash insulator
panel (below the glove box) for access to the
blower motor. Note: When reinstalling this
panel, be sure the left end fits properly into its
recess in the ducting.
3
Using suitable probes, backprobe the
blower motor electrical connector at the
resistor and connect the positive probe of the
voltmeter to the dark blue wire and the nega-
tive probe to the black wire (see illustration).
4
With the transmission in Park, the park-
ing brake securely set, turn the ignition
switch On. It isn't necessary to start the vehi-
cle.
5
Move the blower switch through each of
its positions and note the voltage readings.
Changes in voltage indicate that the motor
speeds will also vary as the switch is moved
to the different positions.
6
If there is voltage present, but the
blower motor does not operate, the blower
motor is probably faulty. Disconnect the
blower motor connector and hook one side to
a chassis ground and the other to a fused
source of battery voltage. If the blower does-
n't operate, it is faulty.
7
If voltage was not present at the blower
motor at all speeds, and the motor itself
tested OK, the problem is in the blower motor
resistor, the blower switch in the control
panel assembly or the related wiring. To
check the resistor, remove the two screws
and remove the resistor from the heater
housing. Using an ohmmeter, check for con-
tinuity across each of the resistor terminals
(see illustration). If an open circuit is indi-
cated, replace the resistor assembly. To test
the blower switch, refer to Section 11,
remove the control panel assembly and
check for continuity through the switch in
each position. Refer to the wiring diagrams at
the end of Chapter 12 to determine the cor-
rect terminals for testing.
Replacement
Refer to illustration 9.11
8
Disconnect the battery negative cable
from the ground stud on the left shock tower
(see Chapter 5, Section 1).
9
Detach the panel underneath the right
9.3 Using suitable probes, backprobe the
blower harness plug (twisted pair of wires)
at the blower motor resistor block -
connect a voltmeter to the dark blue wire
(+) and black wire (-), voltage should vary
as the blower switch is moved through
each position
9.7 To test the blower resistor, check for
continuity at each of the
resistor terminals
Chapter 3 Cooling, heating and air conditioning system
3-7
9.11 Remove the screws retaining the blower motor to the
heater housing (arrow)
10.6 Remove the heater core cover
10.2 Disconnect the heater hoses at the firewall
10.7 Withdraw the heater core from the housing
3
end of the dash. It has four fasteners, all of
them facing up - two screws in front (side
toward the passenger seat) and two sheet
metal nuts on the backside (toward the
firewall).
10
Disconnect the wiring connector at the
blower motor resistor.
11
Remove the screws retaining the blower
motor to the heater housing (see illustra-
tion).
12
Lower the blower motor from the
housing
.
13
The fan is balanced with the blower
motor, and is available only as an assembly.
f the fan is damaged, both fan and blower
motor must be replaced.
14 Installation is the reverse of removal.
10 Heater core - replacement
Refer to illustrations 10.2, 10.6 and 10.7
Warning: These models are equipped with
airbags, always disable the airbag system
before working in the vicinity of the impact
sensors, steering column or instrument panel
•o avoid the possibility of accidental
deploy-ment of the airbag, which could cause
personal injury (see Chapter 12).
Drain the cooling system (see Chapter 1)
and disconnect the negative battery cable
'from the ground stud on the left shock tower
see Chapter 5, Section 1).
2
Disconnect the heater hoses at the fire -
wall (see illustration). Note: On V6 models, it
may be necessary to remove the upper intake
manifold to access the heater hoses (see
Chapter 2B).
3
Refer to Chapter 11 and remove the
radio/air conditioning control panel bezel, the
instrument panel bezel and end covers and
the knee bolster.
4
Remove the center console from the
vehicle (see Chapter 11).
5
Remove two screws at the lower right
side support beam, the bolt for the instru-
ment panel support at the A-pillar and
remove the right side instrument panel sup-
port strut.
6
Remove the heater core cover screws
and the cover (see illustration).
7
Withdraw the heater core from the hous-
ing (see illustration).
8
If the heater core has been leaking,
clean the coolant from the heater/air condi-
tioning housing. Note: If a significant amount
of coolant has leaked into the housing, it is
recommended that the complete heater/air
conditioning housing be removed from the
vehicle,
disassembled
and thoroughly
cleaned (see Section 16).
9
Installation is the reverse of removal. Be
sure to refill the cooling system (see Chap-
ter 1).
11 Heater/air conditioner control
assembly - removal, check and
installation
Warning: These models are equipped with
airbags, always disable the airbag system
before working in the vicinity of the impact
sensors, steering column or instrument panel
to avoid the possibility of accidental deploy-
ment of the airbag, which could cause per-
sonal injury (see Chapter 12).
Removal
Refer to illustrations 11.2, 11.3 and 11.7
1
Disconnect the negative battery cable
from the ground stud on the left shock tower
(see Chapter 5, Section 1).
2
Remove the trim bezel from the instru-
ment panel (see illustration).
TRIM
BEZEL
11.2 Remove the radio/control
module bezel
3-8
Chapter
3
Cooling, heating and
air
conditioning
system
3
Remove the three cluster hood screws
from the trim bezel opening (see illustra-
tion).
4
Pry up the cluster hood bezel a few
inches to expose the cubby bin screws.
5
Disconnect the wiring and remove the
cubby bin.
6
Remove the control module screws (see
illustration 11.3).
7
Lower the control module into the cubby
bin opening (see illustration) and disconnect
the wiring harness from the rear of the control
module.
8
Release the cable clips from the top of
the control module. Retain the clips for fur-
ther use. Disconnect the temperature control
and the recirculation control cables.
9
Remove the control module.
Check
Refer to illustration 11.11
10
Remove the control module (see Steps
above).
11
Using an ohmmeter, measure the resis-
tance between terminals 5 and 8 of the con-
trol module 8-way connector (see illustra-
tion). Turn the control module to each posi-
tion and check the resistance as follows:
a) PANEL = 828 to 856 ohms
b) BI-LEVEL = 1280 to 1300 ohms
c) FLOOR = 2300 to 2358 ohms
d) MIX = 5200 to 5300 ohms
e) DEFROST = 99 to 100 K-ohms
12 If any resistance is not correct, replace
the control module.
13 If the resistance's are correct, check for
blown fuses, damaged wiring, bad connec-
tions, defective Body Control Module (BCM) or
bulkhead connector. Refer to the wiring dia
-
grams at the end of Chapter 12, if necessary.
14
Further testing of the system can be
accomplished with the use of a special scan
tool; see a dealer or other qualified repair
shop.
c) Pull the cable housing away from the
cable end to remove all freeplay and clip
the cable housing to the control module.
d) Verify the knob travels through its full
range.
12 Air conditioning and heating
system - check and maintenance
Warning: The air conditioning system is
under high pressure. Do not loosen any hose
fittings or remove any components until after
the system has been discharged by a dealer
service department or air conditioning service
station. Always wear eye protection when dis-
connecting air conditioning system fittings.
1
The following maintenance checks
should be performed on a regular basis to
ensure the air conditioner continues to oper-
ate at peak efficiency.
a) Check the compressor drivebelt. If it's
worn or deteriorated, replace it (see
Chapter 1).
b) Check the drivebelt tension and, if nec-
essary, adjust it (see Chapter 1).
c) Check the system hoses. Look for
cracks, bubbles, hard spots and deterio-
ration. Inspect the hoses and all fittings
for oil bubbles and seepage. If there's
any evidence of wear, damage or leaks,
replace the hose(s).
Inspect the condenser fins for leaves,
bugs and other debris. Use a "fin comb"
or compressed air to clean the con-
denser.
Make sure the system has the correct
refrigerant charge.
f) Check the evaporator housing drain
tube for blockage.
2
It's a good idea to operate the system
for about 10 minutes at least once a month,
particularly during the winter. Long term non-
use can cause hardening, and subsequent
failure, of the seals.
3
Because of the complexity of the air con-
ditioning system and the special equipment
necessary to service it, in-depth troubleshoot-
ing and repairs are not included in this manual
(refer to the Haynes Automotive Heating and
Air Conditioning Repair Manual). However.
simple checks and component replacement
procedures are provided in this Chapter.
4
The most common cause of poor cool-
ing is simply a low system refrigerant charge.
If a noticeable drop in cool air output occurs.
the following quick check will help you deter-
mine if the refrigerant level is low.
Checking the refrigerant
charge
5
Warm the engine up to normal operating
temperature.
6
Place the air conditioning temperature
selector at the coldest setting and the blower
at the highest setting. Open the doors (to
make sure the air conditioning system does
not cycle off as soon as it cools the passen-
ger compartment).
7
With the compressor engaged - the
clutch will make an audible click and the cen-
ter of the clutch will rotate - note the temper-
ature of the compressor inlet and discharge
li nes. If the compressor discharge line feels
warm and the compressor inlet pipe feels
cool, the system is properly charged.
8
Place a thermometer in the dashboard
Installation
d)
15
Installation is the reverse of removal. If
necessary, adjust the cables as follows:
a) Attach the cable to the control module
lever.
e)
b) Rotate the knob fully counterclockwise.
Chapter 3 Cooling, heating and air conditioning system
3-9
12.12 Cans of R-134A refrigerant are
available in auto parts stores that can be
added to your system with a simple
recharging kit
vent nearest the evaporator and operate the
system until the indicated temperature is
around 40 to 45 degrees F. If the ambient
(outside) air temperature is very high, say 110
degrees F, the duct air temperature may be
as high as 60 degrees F, but generally the air
conditioning is 30-50 degrees F cooler than
the ambient air. Note: Humidity of the ambi-
ent air also affects the cooling capacity of the
system. Higher ambient humidity lowers the
effectiveness of the air conditioning system.
Adding refrigerant
Refer to illustration 12.12
9
Buy an automotive charging kit at an
auto parts store. A charging kit includes a 14-
ounce can of refrigerant, a tap valve and a
short section of hose that can be attached
between the tap valve and the system low
side service valve. Because one can of refrig-
erant may not be sufficient to bring the sys-
tem charge up to the proper level, it's a good
idea to buy an additional can. Make sure that
one of the cans contains red refrigerant dye.
If the system is leaking, the red dye will leak
out with the refrigerant and help you pinpoint
the location of the leak. Caution: There are
two types of refrigerant used in automotive
systems; R-12 - which has been widely used
on earlier models and the more environmen-
tally-friendly R-134a used in all models cov-
ered by this manual. These two refrigerants
(and their appropriate refrigerant oils) are not
compatible and must never be mixed or com-
ponents will be damaged. Use only R-134a
refrigerant in the models covered by this
manual.
10
Hook up the charging kit by following
the manufacturer's instructions. Warning:
DO NOT hook the charging kit hose to the
system high side! The fittings on the charging
kit are designed to fit only on the low side of
the system.
11
Back off the valve handle on the charg-
ing kit and screw the kit onto the refrigerant
can, making sure first that the 0-ring or rub-
ber seal inside the threaded portion of the kit
is in place. Warning: Wear protective eye-
wear when dealing with pressurized refriger-
ant cans.
12
Remove the dust cap from the low-side
charging connection and attach the quick-
connect fitting on the kit hose (see illustra-
tion).
13
Warm up the engine and turn on the air
conditioner. Keep the charging kit hose away
from the fan and other moving parts. Note:
The charging process requires the compres-
sor to be running.
14
Turn the valve handle on the kit until the
stem pierces the can, then back the handle
out to release the refrigerant. You should be
able to hear the rush of gas. Add refrigerant to
the low side of the system until both the
receiver-drier surface and the evaporator inlet
pipe feel about the same temperature. Allow
stabilization time between each addition.
15 If you have an accurate thermometer,
you can place it in the center air conditioning
duct inside the vehicle and keep track of the
"conditioned" air temperature. A charged
system that is working properly should cool
down to approximately 40 degrees F. If the
ambient (outside) air temperature is very high,
say 110 degrees F, the duct air temperature
may be as high as 60 degrees F, but gener-
ally the air conditioning is 30 to 40 degrees F
cooler than the ambient air.
16
When the can is empty, turn the valve
handle to the closed position and release the
connection from the low-side port. Replace
the dust cap. Warning: Never add more than
two cans of refrigerant to the system.
17
Remove the charging kit from the can
and store the kit for future use with the pierc-
ing valve in the UP position, to prevent inad-
vertently piercing the can on the next use.
13 Air conditioning compressor -
removal and installation
Warning: The air conditioning system is
under high pressure. DO NOT disassemble
any part of the system (hoses, compressor,
line fittings, etc.) until after the system has
been evacuated and the refrigerant recovered
by a dealer service department or air condi-
tioning service station.
Note: The filter-drier/receiver-drier (see Sec-
tion 14) should be replaced whenever the
compressor is replaced.
Removal
Refer to illustrations 13.3, 13.5 and 13.6
1
Have the system discharged (see the
Warning at the beginning of this Section).
2
Disconnect the negative battery cable
from the ground stud on the left shock tower
(see Chapter 5, Section 1).
3
Unplug the electrical connector from the
compressor clutch (see illustration).
4
Remove the drivebelt (see Chapter 1).
5
Disconnect the refrigerant lines from the
compressor (see illustration). Plug the open
fittings to prevent entry of dirt and moisture.
6
Unbolt the compressor from the mount-
ing bracket (see illustration) and lift it out of
the vehicle.
3
13.3 Unplug the electrical connector
(arrow) from the compressor clutch
13.5 Remove the retaining bolts, detach
and plug the refrigerant lines at
the compressor
13.6 To detach the compressor from its
mounting bracket, remove these
bolts (arrows)
3-10
Chapter 3 Cooling, heating and air conditioning system
14.4 Using a back-up wrench to prevent
damage to the fittings, disconnect the
refrigerant lines (arrows) from the
receiver-drier
Installation
7
If a new compressor is being installed,
pour out the oil from the old compressor into
a graduated container and add that amount
of new refrigerant oil to the new compressor.
Also follow any directions included with the
new compressor.
8
The clutch may have to be transferred
from the original to the new compressor.
9
Installation is the reverse of removal.
Replace all 0-rings with new ones specifi-
cally made for use with R-134a refrigerant
and lubricate them with R-134a-compatible
refrigerant oil.
10
Have the system evacuated, recharged
and leak tested by the shop that discharged
it.
14 Air conditioning receiver-drier -
removal and installation
Warning: The air conditioning system is
under high pressure. DO NOT disassemble
any part of the system (hose, compressor,
line fittings, etc.) until after the system has
been evacuated and the refrigerant recovered
by a dealer service department or air condi-
tioning service station.
Caution: Replacement filter-drier/receiver-
drier units are so effective at absorbing mois-
ture that they can quickly saturate upon expo-
sure to the atmosphere. When installing a
new unit, have all tools and supplies ready for
quick reassembly to avoid having the system
open any longer than necessary.
Removal
Refer to illustration 14.4
1
The receiver-drier acts as a reservoir for
the system refrigerant. It's located on the
right side of the engine compartment, next to
the radiator and condenser.
2
Have the system discharged (see the
Warning at the beginning of this Section).
3
Disconnect the negative battery cable
from the ground stud on the left shock tower
15.4 Remove the upper radiator
support crossmember
(see Chapter 5, Section 1).
4
Disconnect the refrigerant lines from the
receiver-drier (see illustration). Use a back-
up wrench to prevent twisting the tubing
where it joins the condenser.
5
Plug the open fittings to prevent entry of
dirt and moisture.
6
Remove the bracket bolt at the base of
the receiver/drier. Spread the aluminum
clamp and remove the receiver/drier.
Installation
7
Installation is the reverse of removal. If a
new receiver-drier is being installed add one
ounce of refrigerant oil to it before installa-
tion.
8
Take the vehicle back to the shop that
discharged it. Have the system evacuated,
recharged and leak tested.
15 Air conditioning condenser -
removal and installation
Warning: The air conditioning system is
under high pressure. Do not loosen any hose
fittings or remove any components until after
the system has been discharged by a dealer
service department or air conditioning service
station. Always wear eye protection when dis-
connecting air conditioning system compo-
nents.
Note: The receiver-drier should be replaced
whenever the condenser is replaced (see
section 14).
Removal
Refer to illustrations 15.4 and 15.5
1
Have the system discharged (see the
Warning at the beginning of this Section).
2
Disconnect the negative battery cable
from the ground stud on the left shock tower
(see Chapter 5, Section 1).
3
Remove the radiator grille (see Chap-
ter 11).
4
Remove the upper radiator support
crossmember (see illustration).
5
Using the appropriate quick-connect
15.5 Using the appropriate quick-connect
coupling tool, disconnect the air
conditioner condenser lines (A) from the
condenser and remove the
mounting bolts (B)
coupling tools (available at auto parts stores),
disconnect and cap the air conditioning lines
at the condenser (see illustration).
6
Remove the radiator fan module mounts.
7
Remove the condenser line support
bracket.
8
Remove the condenser mounting bolts
(see illustration 15.5).
9
Remove the condenser from the vehicle.
Installation
10 Installation is the reverse of removal. If a
new condenser is being installed add one
ounce of refrigerant oil to it before installa-
tion.
11
Take the vehicle back to the shop that
discharged it. Have the system evacuated,
recharged and leak tested.
16 Air conditioning evaporator and
expansion valve - removal and
installation
Warning 1: These models are equipped with
airbags, always disable the airbag system
before working in the vicinity of the impact
sensors, steering column or instrument panel
to avoid the possibility of accidental deploy-
ment of the airbag, which could cause per-
sonal injury (see Chapter 12).
Warning 2: The air conditioning system is
under high pressure. Do not loosen any hose
fittings or remove any components until after
the system has been discharged by a dealer
service department or air conditioning service
station. Always wear eye protection when dis-
connecting air conditioning system compo-
nents.
Note: Evaporator removal on these models is
a difficult undertaking for the home mechanic.
It can be done, but it requires discharging the
air conditioning system, disconnecting the
passenger airbag system and a great many
wiring connectors under the dash and remov-
ing the complete instrument panel assembly.
Chapter 3 Cooling, heating and air conditioning system
3-11
16.3 Disconnect and cap the refrigerant
li nes from the expansion valve
16.15 Remove the evaporator probe from
the evaporator core
16.17 Remove the clips retaining the two
housing sections
16.18a Pull the two sections apart .. .
EVAPORATOR
HOUSING
HEATER
DISTRIBUTION
HOUSING
16.18b . . . and separate the heater housing from the
evaporator housing
3
The air conditioning evaporator is contained
in a two-piece housing which must be
removed from under the dash and separated
into two halves.
Expansion valve
Note: The expansion valve can be replaced
without removing the evaporator from the
vehicle or removed along with the evaporator.
Removal
Refer to illustration 16.3
1
Have the system discharged (see the
Warning at the beginning of this Section).
2
Disconnect the negative battery cable
from the ground stud on the left shock tower
(see Chapter 5, Section 1).
3
Remove the security clips from expan-
sion valve refrigerant line quick-connect fit-
tings. Using the appropriate quick-connect
coupling tools (available at auto parts stores),
disconnect and cap the air conditioning lines
at the expansion valve (see illustration).
4
Remove the retaining bolts and separate
the expansion valve from the evaporator.
Installation
5
Installation is the reverse of removal.
Install new 0-ring seals on the expansion
valve and lubricate them with R-134a-com-
patible refrigerant oil prior to installation.
6
Take the vehicle back to the shop that
discharged it. Have the system evacuated,
recharged and leak tested.
Evaporator
Removal
Refer to illustrations 16.15, 16.17, 16.18a,
16.18b and 16.20
7
Have the system discharged (see the
Warning at the beginning of this Section).
8
Disconnect the negative battery cable
from the ground stud on the left shock tower
(see Chapter 5, Section 1).
9
Drain the cooling system. Disconnect
the heater hoses from the heater core at the
firewall (see Section 10). Cap the heater core
fittings to prevent spilling coolant on the inte-
rior when the housing is removed.
10
Disconnect and cap the refrigerant lines
from the expansion valve (see above).
11
Refer to Chapter 11 and remove the
complete instrument, panel assembly.
12
Remove the center air distribution ducts
from the heater/air conditioning housing.
13
Disconnect any wiring harness connec-
tors attached to the housing.
14
Remove the bolts securing the heat-
er/air conditioning housing to the bulkhead
and carefully remove the housing from the
vehicle.
15
Using a screwdriver, pry the locking tab
off the evaporator probe. Twist the evapora-
tor probe access cover 1/4-turn clockwise
and remove the cover. Carefully withdraw the
evaporator probe from the evaporator core
(see illustration).
16
Remove the recirculating door inlet
cover.
17
Remove the clips retaining the housing
sections together (see illustration).
18
Separate the evaporator housing from
the heater/distribution housing (see illustra-
tions).
19
Remove the seal around the evaporator
3-12
Chapter 3 Cooling, heating and air conditioning system
tube inlet.
20
Remove the evaporator housing upper
cover (see illustration).
21
Withdraw the evaporator core from the
housing.
Installation
Note: When installing a new evaporator,
always use a new gasket on the expansion
valve (see illustration) and reinstall the tem-
perature sensor from the old core into the
new core before installation.
22 Installation is the reverse of removal. If a
new evaporator is being installed, add one
ounce of new, R-134a-compatible refrigerant
oil into it prior to installation.
23
Take the vehicle back to the shop that
discharged it. Have the system evacuated,
recharged and leak tested.
EVAPORATOR
HOUSING
COVER
16.20 Remove the
evaporator housing
upper cover
Chapter 4
Fuel and exhaust systems
Contents
Section
Accelerator cable - replacement . . . . . . . . . . . . . . ..10
Air cleaner assembly - removal and installation . . . . . . . . ... 9
Air filter - replacement . . . . . . . . . . . . . .. See Chapter 1
CHECK ENGINE light. . . . . . . . . . . . . . See Chapter 6
Exhaust system servicing - general information. . . . . . . . .. 18
Fuel filter - removal and installation . . . . . . . . . . . . . . 15
Fuel injection system - general check . . . . . . . . . . . . . 12
Fuel injection system - general information . . . . . . . . . . . 11
Fuel level sending unit - check and replacement . . . . . . . . ..8
Fuel pressure regulator and fuel inlet strainer - replacement . . . .. 14
Fuel pressure relief procedure . . . . . . . . . . . . . . . ... 2
Fuel pump module - removal and installation. . . . . . . . . . 7
Fuel pump/fuel pressure regulator - check. . . . . . . . . . . 3
Fuel rail and injectors - check, removal and installation . . . . . ..16
Fuel tank - removal and installation . . . . . . . . . . . . . ... 5
Fuel tank cleaning and repair - general information . . . . . . . .. 6
General information . . . . . . . . . . . . . . . . . . . . 1
Idle Air Control (IAC) motor - check and replacement . . . . . . .17
Quick-connect fittings and fuel lines - disassembly, assembly
and replacement. . . . . . . . . . . . . . . . . . . ...4
Throttle body - check, removal and installation . . . . . . . . ...13
4
Specifications
General
Fuel pressure. . . . . . . . . . . . . . . . . . . . . . . . ... 47 to 51 psi
Fuel injector resistance (approximate). . . . . . . . . . . . . . . . 12 to 15 ohms @ 68-degrees F
Fuel level sending unit resistance (approximate)
Full position. . . . . . . . . . . . . . . . . . . . . . . . .50 ohms (minimum)
Empty position. . . . . . . . . . . . . . . . . . . . . . . 1040 to 1060 ohms
Torque specifications
Ft-lbs (unless otherwise indicated)
Fuel rail mounting bolts
Four-cylinder engines. . . . . . . . . . . . . . . . . . . . .200 in-lbs
V6 engine. . . . . . . . . . . . . . . . . . . . . . . . . 106 in-lbs
Fuel tank drain plug . . . . . . . . . . . . . . . . . . . . . . . 32 in-lbs
Fuel tank strap bolts. . . . . . . . . . . . . . . . . . . . . . 44
Idle Air Control motor-to-throttle body screws . . . . . . . . . . . . 25 in-lbs
Throttle body mounting bolts
Four-cylinder engines. . . . . . . . . . . . . . . . . . . . .200 in-lbs
V6 engine. . . . . . . . . . . . . . . . . . . . . . . . . 250 in-lbs
1
General information
The vehicles covered by this manual are
equipped with a sequential Multi-Port Fuel
Injection (MPFI) system. This system uses
ti med impulses to sequentially inject the fuel
directly into the intake ports of each cylinder.
The injectors are controlled by the Powertrain
Control Module (PCM). The PCM monitors
various engine parameters and delivers the
exact amount of fuel, in the correct
sequence, to the intake ports. It also controls
the engine idle speed via the idle air control
motor which is mounted to the throttle body.
All models are equipped with an electric
fuel pump which is located inside the fuel
tank. It is necessary to remove the fuel tank
to gain access to the fuel pump. The fuel level
sending unit is an integral component of the
fuel pump and it must be removed from the
fuel tank in the same manner. These vehicles
are equipped with a "returnless" fuel system.
In this system the fuel pressure regulator is
part of the fuel pump/fuel level sending unit
and also located inside the fuel tank. Regu-
lated fuel is sent to the fuel rail and excess
fuel is bled off directly into the fuel tank.
The exhaust system consists of the
exhaust manifold(s), a catalytic converter, an
exhaust pipe and a muffler. Each of these
components is replaceable. For further infor-
mation regarding the catalytic converter, refer
to Chapter 6.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст