Honda Civic. Manual — part 310

ENGINE PERFORMANCE

CARBURETOR TROUBLE SHOOTING:

BASIC COLD START SYMPTOMS TROUBLE SHOOTING CHART

Exhaust manifold cracked or broken

Replace exhaust

manifold, See

ENGINES

NOTE:

This is GENERAL information. This article is not intended to
be specific to any unique situation or individual vehicle
configuration. The purpose of this Trouble Shooting
information is to provide a list of common causes to
problem symptoms. For model-specific Trouble Shooting,
refer to SUBJECT, DIAGNOSTIC, or TESTING articles
available in the section(s) you are accessing.

CONDITION & POSSIBLE CAUSE

CORRECTION

Engine Won't Start

Choke not closing

Check choke

operation, see FUEL

SYSTEMS

Choke linkage bent

Check linkage, see

FUEL SYSTEM

Engine Starts, Then Dies

Choke vacuum kick setting too wide

Check setting and

adjust see, FUEL

SYSTEMS

Fast idle RPM too low

Reset RPM to

specification, see

TUNE-UP

Fast idle cam index incorrect

Reset fast idle cam

index, see FUEL

SYSTEMS

Vacuum leak

Inspect vacuum system

2008 Honda Civic EX

GENERAL INFORMATION Trouble Shooting - Basic Procedures

BASIC HOT START SYMPTOMS TROUBLE SHOOTING CHART

BASIC COLD ENGINE DRIVEABILITY SYMPTOMS TROUBLE
SHOOTING CHART

for leaks

Low fuel pump outlet

Repair or replace

pump, see FUEL

SYSTEMS

Low carburetor fuel level

Check float setting see

FUEL SYSTEM

Engine Quits Under Load

Choke vacuum kick setting incorrect

Reset vacuum kick

setting,see FUEL

SYSTEMS

Fast idle cam index incorrect

Reset fast idle cam

index, see FUEL

SYSTEM

Incorrect hot fast idle speed RPM

Reset fast idle RPM,

see TUNE-UP

Engine Starts, Runs Up, Then Idles, Slowly With Black Smoke

Choke vacuum kick set too narrow

Reset vacuum kick,

see FUEL SYSTEMS

Fast idle cam index incorrect

Reset fast idle cam

index, see FUEL

SYSTEMS

Hot fast idle RPM too low

Reset fast idle RPM,

see TUNE-UP

CONDITION & POSSIBLE CAUSE

CORRECTION

Engine Won't Start

Engine flooded

Allow fuel to

evaporate

CONDITION & POSSIBLE CAUSE

CORRECTION

Engine Stalls in Gear

2008 Honda Civic EX

GENERAL INFORMATION Trouble Shooting - Basic Procedures

BASIC WARM ENGINE DRIVEABILITY SYMPTOMS TROUBLE
SHOOTING CHART

Choke vacuum kick setting incorrect

Reset choke vacuum

kick, see FUEL

SYSTEMS

Fast idle RPM incorrect

Reset fast idle RPM,

see TUNE-UP

Fast idle cam index incorrect

Reset fast idle cam see

FUEL SYSTEMS

Acceleration Sag or Stall

Defective choke control switch

Replace choke control

switch

Choke vacuum kick setting incorrect

Reset choke vacuum

kick see, FUEL

SYSTEMS

Float level incorrect (too low)

Adjust float level,

FUEL SYSTEMS

Accelerator pump defective

Repair or replace

pump see FUEL

SYSTEMS

Secondary throttles not closed

Inspect lockout

adjustment, see FUEL

SYSTEMS

Sag or Stall After Warmup

Defective choke control switch

Replace choke control

switch, see FUEL

SYSTEMS

Defective accelerator pump

Replace pump, see

FUEL SYSTEMS

Float level incorrect (too low)

Adjust float level, see

FUEL SYSTEMS

Backfiring & Black Smoke

Plugged heat crossover system

Remove restriction

2008 Honda Civic EX

GENERAL INFORMATION Trouble Shooting - Basic Procedures

DIESEL ENGINE TROUBLE SHOOTING

CONDITION & POSSIBLE CAUSE

CORRECTION

Hesitation With Small Amount of Gas Pedal Movement

Vacuum leak

Inspect vacuum lines

Accelerator pump weak or inoperable

Replace pump, see

FUEL SYSTEMS

Float level setting too low

Reset float level,

see,FUEL SYSTEMS

Metering rods sticking or binding

Inspect and/or replace

rods, see FUEL

SYSTEMS

Carburetor idle or transfer system plugged

Inspect system and

remove restriction

Frozen or binding heated air inlet

Inspect heated air door

for binding

Hesitation With Heavy Gas Pedal Movement

Defective accelerator pump

Replace pump, see

FUEL SYSTEMS

Metering rod carrier sticking or binding

Remove restriction

Large vacuum leak

Inspect vacuum system

and repair leak

Float level setting too low

Reset float level, see

FUEL SYSTEMS

Defective fuel pump, lines or filter

Inspect pump, lines

and filter

Air door setting incorrect

Adjust air door setting,

see FUEL

NOTE:

This is GENERAL information. This article is not intended to
be specific to any unique situation or individual vehicle
configuration. The purpose of this Trouble Shooting
information is to provide a list of common causes to
problem symptoms. For model-specific Trouble Shooting,

2008 Honda Civic EX

GENERAL INFORMATION Trouble Shooting - Basic Procedures