Acura RL. Manual - part 360

Faulty push rod seat or lifter plunger

Replace plunger or push rod

Noisy Valves

Improper valve lash

Re-adjust valve lash, See 

ENGINES

Worn or dirty valve lifters

Clean and/or replace lifters

Worn valve guides

Replace valve guides, See 

ENGINES

Excessive valve seat or face run-out

Reface seats or valve face

Worn camshaft lobes

Replace camshaft, See 

ENGINES

Loose rocker arm studs

Re-tighten rocker arm studs, 

See ENGINES

Bent push rods

Replace push rods, See 

ENGINES

Broken valve springs

Replace valve springs, See 

ENGINES

Burned,Sticking or Broken Valves

Weak valve springs or warped valves

Replace valves and/or springs, 

See ENGINES

Improper lifter clearance

Re-adjust clearance or replace 

lifters

Worn guides or improper guide clearance

Replace valve guides, See 

ENGINES

Out-of-round valve seats or improper seat width

Re-grind valve seats

Gum deposits on valve stems, seats or guide

Remove deposits

Improper spark timing

Re-adjust spark timing

Broken Pistons/Rings

Undersize pistons

Replace with larger pistons, 

See ENGINES

Wrong piston rings

Replace with correct rings, 

See ENGINES

Out-of-round cylinder bore

Re-bore cylinder bore

Improper connecting rod alignment

Remove and realign 

connecting rods

Excessively worn ring grooves

Replace pistons, See 

ENGINES

Improperly assembled piston pins

Re-assemble pin-to-piston, 

See ENGINES

Insufficient ring gap clearance

Install new rings, See 

ENGINES

Engine overheating

Check cooling system

Incorrect ignition timing

Re-adjust ignition timing, See 

TUNE-UP

Excessive Exhaust Noise

Leaks at manifold to head, or to pipe

Replace manifold or pipe 

gasket

 

2007 Acura RL 

GENERAL INFORMATION Trouble Shooting - Basic Procedures

  

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Page 19 

© 2005 Mitchell Repair Information Company, LLC. 

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 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 

 

2007 Acura RL 

GENERAL INFORMATION Trouble Shooting - Basic Procedures

  

me 

 

Friday, June 05, 2009 2:26:48 PM

Page 20 

© 2005 Mitchell Repair Information Company, LLC. 

BASIC HOT START SYMPTOMS TROUBLE SHOOTING CHART 

BASIC COLD ENGINE DRIVEABILITY SYMPTOMS TROUBLE SHOOTING CHART 

BASIC WARM ENGINE DRIVEABILITY SYMPTOMS TROUBLE SHOOTING CHART 

TUNE-UP

CONDITION & POSSIBLE CAUSE

CORRECTION

Engine Won't Start

Engine flooded

Allow fuel to evaporate

CONDITION & POSSIBLE CAUSE

CORRECTION

Engine Stalls in Gear

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

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

 

2007 Acura RL 

GENERAL INFORMATION Trouble Shooting - Basic Procedures

  

me 

 

Friday, June 05, 2009 2:26:48 PM

Page 21 

© 2005 Mitchell Repair Information Company, LLC. 

DIESEL ENGINE TROUBLE SHOOTING 

BASIC DIESEL ENGINE TROUBLE SHOOTING CHART 

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, refer to SUBJECT, 
DIAGNOSTIC, or TESTING articles available in the section(s) you are 
accessing.

NOTE:

Diesel engines mechanical diagnosis is the same as gasoline engines for 
items such as noisy valves, bearings, pistons, etc. The following trouble 
shooting covers only items pertaining to diesel engines.

CONDITION & POSSIBLE CAUSE

CORRECTION

Engine Won't Crank

Bad battery connections or dead batteries

Check connections and/or 

replace batteries

Bad starter connections or bad starter

Check connections and/or 

replace starter

Engine Cranks Slowly, Won't Start

Bad battery connections or dead batteries

Check connections and/or 

replace batteries

Engine oil too heavy

Replace engine oil

Engine Cranks Normally, But Will Not Start

Glow plugs not functioning

Check glow plug system, see 

FUEL SYSTEMS

Glow plug control not functioning

Check controller, see FUEL 

SYSTEMS

Fuel not injected into cylinders

Check fuel injectors, see 

FUEL SYSTEMS

 

2007 Acura RL 

GENERAL INFORMATION Trouble Shooting - Basic Procedures

  

me 

 

Friday, June 05, 2009 2:26:48 PM

Page 22 

© 2005 Mitchell Repair Information Company, LLC.