Acura RL. Instruction — page 364

BASIC DRIVEABILITY PROBLEMS TROUBLE SHOOTING

High resistance in coil wire

Replace coil wire

Corrosion in coil tower terminal

Clean and/or replace coil

Corrosion in distributor coil terminal

Clean and/or replace

distributor cap

Firing Voltage Lines are the Same but Abnormally Low

Fuel mixture too rich

Readjust carburetor, see

ENGINE PERFORMANCE

Breaks in coil wire causing arcing

Replace coil wire

Cracked coil tower causing arcing

Replace coil

Low coil output

Replace coil

Low engine compression

Determine cause and repair

One or More, But Not All Firing Voltage Lines are Higher Than Others

Carburetor idle mixture not balanced

Readjust carburetor, see

ENGINE PERFORMANCE

EGR valve stuck open

Clean and/or replace valve

High resistance in spark plug wires

Replace spark plug wires

Cracked or broken spark plug insulator

Replace spark plugs

Intake vacuum leak

Repair leak

Defective spark plugs

Replace spark plugs

Corroded spark plug terminals

Replace spark plugs

One or More, But Not All Firing Voltage Lines Are Lower Than Others

Curb idle mixture not balanced

Readjust carburetor, see

ENGINE PERFORMANCE

Breaks in plug wires

Replace plug wires causing

arcing

Cracked coil tower causing arcing

Replace coil

Low compression

Determine cause and repair

Defective spark plugs

Replace spark plugs

Corroded spark plugs

Replace spark plugs

Cylinders Not Firing

Cracked distributor cap terminals

Replace distributor cap

Shorted spark plug wire

Determine cause and repair

Mechanical problem in engine

Determine cause and repair

Defective spark plugs

Replace spark plugs

Spark plugs fouled

Replace spark plugs

CONDITION & POSSIBLE CAUSE

CORRECTION

Hard Starting

Binding carburetor linkage

Eliminate binding

Binding choke linkage

Eliminate binding

Binding choke piston

Eliminate binding

Restricted choke vacuum

Check vacuum lines for

blockage

Worn or dirty needle valve and seat

Clean carburetor, see

2007 Acura RL

GENERAL INFORMATION Trouble Shooting — Basic Procedures

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Friday, June 05, 2009 2:26:48 PM

Page 35

© 2005 Mitchell Repair Information Company, LLC.

ENGINE PERFORMANCE

Float sticking

Readjust or replace float see

the ENGINE

PERFORMANCE section

Incorrect choke adjustment

Reset choke adjustment see

ENGINE PERFORMANCE

Defective coil

Replace coil

Improper spark plug gap

Regap spark plugs

Incorrect ignition timing

Reset ignition timing see

ENGINE PERFORMANCE

Detonation

Over-advanced ignition timing

Reset ignition timing see

ENGINE PERFORMANCE

Defective spark plugs

Replace spark plugs

Fuel lines clogged

Clean fuel lines

EGR system malfunction

Check and repair EGR system

PCV system malfunction

Repair PCV system

Vacuum leaks

Check and repair vacuum

system

Loose fan belts

Tighten or replace fan belts,

see ENGINE

PERFORMANCE

Restricted airflow

Remove restriction

Vacuum advance malfunction

Check distributor operation

Dieseling

Binding carburetor linkage

Eliminate binding

Binding throttle linkage

Eliminate blinding

Binding choke linkage or fast idle cam

Eliminate binding

Defective idle solenoid

Replace idle solenoid see

ENGINE PERFORMANCE

Improper base idle speed

Reset idle speed, see see

ENGINE PERFORMANCE

Incorrect ignition timing

Reset ignition timing see

ENGINE PERFORMANCE

Incorrect idle mixture setting

Reset idle mixture, see

ENGINE PERFORMANCE

Faulty Acceleration

Incorrect ignition timing

Reset ignition timing see

ENGINE PERFORMANCE

Engine cold and choke too lean

Adjust choke and allow

engine to warm-up

Defective spark plugs

Replace spark plugs

Defective coil

Replace coil

Faulty Low Speed Operation

Clogged idle transfer slots

Clean idle transfer slots, see

FUEL

2007 Acura RL

GENERAL INFORMATION Trouble Shooting — Basic Procedures

me

Friday, June 05, 2009 2:26:48 PM

Page 36

© 2005 Mitchell Repair Information Company, LLC.

Restricted idle air bleeds and passages

Disassemble and clean

carburetor, see FUEL

Clogged air cleaner

Replace air filter

Defective spark plugs

Replace spark plugs

Defective ignition wires

Replace ignition wire see

ENGINE PERFORMANCE

Defective distributor cap

Replace distributor cap

Faulty High Speed Operation

Incorrect ignition timing

Reset ignition timing see

ENGINE PERFORMANCE

Defective distributor centrifugal advance

Replace advance mechanism

Defective distributor vacuum advance

Replace advance unit

Incorrect spark plugs or plug gap

Check gap and/or replace

spark plugs

Faulty choke operation

Check choke and repair as

required

Clogged vacuum passages

Remove restrictions

Improper size or clogged main jet

Check jet size and clean, see

FUEL

Restricted air cleaner

Check filter and replace as

necessary

Defective distributor cap, rotor or coil

Replace cap, rotor or coil

Misfire at All Speeds

Defective spark plugs

Replace spark plugs

Defective spark plug wires

Replace spark plug wires

Defective distributor cap, rotor, or coil

Replace cap, rotor, or coil

Cracked or broken vacuum hoses

Replace vacuum hoses

Vacuum leaks

Repair vacuum leaks

Fuel lines clogged

Remove restriction

Hesitation

Cracked or broken vacuum

Replace vacuum hoses hoses

Vacuum leaks

Repair Vacuum leaks

Binding carburetor linkage

Eliminate binding

Binding throttle linkage

Eliminate binding

Binding choke linkage or fast idle cam

Eliminate binding

Improper float setting

Readjust float setting, see

FUEL

Cracked or broken ignition wires

Replace ignition wires

Rough Idle, Missing or Stalling

Incorrect curb idle or fast idle speed

Reset idle speed, see see

ENGINE PERFORMANCE

Incorrect basic timing

Reset ignition timing see

ENGINE PERFORMANCE

Improper idle mixture adjustment

Reset idle mixture, see

ENGINE PERFORMANCE

2007 Acura RL

GENERAL INFORMATION Trouble Shooting — Basic Procedures

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Friday, June 05, 2009 2:26:48 PM

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© 2005 Mitchell Repair Information Company, LLC.

Improper feedback system operation

Check feedback system see

ENGINE PERFORMANCE

Incorrect spark plug gap

Reset spark plug gap, see

ENGINE PERFORMANCE

Moisture in ignition components

Dry components

Loose or broken ignition wires

Replace ignition wires

Damaged distributor cap or or rotor

Replace distributor cap or

rotor

Faulty ignition coil

Replace ignition coil

Fuel filter clogged or worn

Replace fuel filter

Damaged idle mixture screw

Replace idle mixture screw,

see FUEL

Improper fast idle cam adjustment

Reset fast idle cam

adjustment, see TUNE- see

ENGINE PERFORMANCE

Improper EGR valve operation

Replace EGR valve

Faulty PCV valve air flow

Replace PCV valve

Choke binding or improper choke setting

Reset choke or eliminate

binding

Vacuum leak

Repair vacuum leak

Improper float bowl fuel level

Reset float adjustment, see

FUEL

Clogged air bleed or idle passages

Clean carburetor passages, see

FUEL

Clogged or worn air cleaner filter

Replace air filter

Faulty choke vacuum diaphragm

Replace diaphragm, see

ENGINE PERFORMANCE

Exhaust manifold heat valve inoperative

Replace heat valve

Improper distributor spark advance

Check distributor operation

Leaking valves or valve components

Check and repair valvetrain

Improper carburetor mounting

Remove and remount

carburetor

Excessive play in distributor shaft

Replace distributor

Loose or corroded wiring connections

Repair or replace as required

Engine Surges

Improper PCV valve airflow

Replace PCV valve

Vacuum leaks

Repair vacuum leaks

Clogged air bleeds

Remove restriction

EGR valve malfunction

Replace EGR valve

Restricted air cleaner filter

Replace air filter

Cracked or broken vacuum hoses

Replace vacuum hoses

Cracked or broken ignition wires

Replace ignition wires

Vacuum advance malfunction

Check unit and replace as

necessary

Defective or fouled spark plugs

Replace spark plugs

Ping or Spark Knock

2007 Acura RL

GENERAL INFORMATION Trouble Shooting — Basic Procedures

me

Friday, June 05, 2009 2:26:48 PM

Page 38

© 2005 Mitchell Repair Information Company, LLC.

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