Engine General Information and Diagnosis: 1A-8
Engine stalls often
(Control circuit or sensor
improperly operating)
Defective ECM.
Replace.
Defective fuel pressure regulator.
Replace.
Defective TP sensor.
Replace.
Defective IAT sensor.
Replace.
Defective CKP sensor.
Replace.
Defective ECT sensor.
Replace.
Defective fuel pump relay.
Replace.
Engine stalls often
(Engine parts improperly
operating)
Fouled spark plug.
Clean.
Defective CKP sensor or ECM.
Replace.
Clogged fuel hose.
Clean.
Valve clearance out of adjustment.
Adjust.
Engine noisy (Excessive
valve chatter)
Too large valve clearance.
Adjust.
Weakened or broken valve springs.
Replace.
Worn rocker arm contacting surface or
cam surface.
Replace.
Worn and burnt camshaft journal.
Replace.
Engine noisy (Noise
seems to come from
piston)
Worn down piston or cylinder.
Replace.
Combustion chambers fouled with
carbon.
Clean.
Worn piston pin or piston pin bore.
Replace.
Worn piston rings or ring grooves.
Replace.
Engine noisy (Noise
seems to come from
timing chain)
Stretched chain.
Replace.
Worn sprockets.
Replace.
Tension adjuster not working.
Repair or replace.
Engine noisy (Noise
seems to come from
crankshaft)
Rattling bearings due to wear.
Replace.
Worn and burnt journal bearings.
Replace.
Engine noisy (Noise
seems to come from
balancer)
Worn and burnt journal bearings.
Replace.
Engine noisy (Noise
seems to come from
transmission)
Worn or rubbing gears.
Replace.
Worn splines.
Replace.
Worn or rubbing primary gears.
Replace.
Worn bearings.
Replace.
Engine noisy (Noise
seems to come from
water pump)
Worn or damaged impeller shaft.
Replace.
Worn or damaged mechanical seal.
Replace.
Contact between pump case and
impeller.
Replace.
Engine runs poorly in
high speed range
(Defective engine internal/
electrical parts)
Weakened valve springs.
Replace.
Worn camshaft.
Replace.
Valve timing out of adjustment.
Adjust.
Too narrow spark plug gap.
Adjust.
Ignition not advanced sufficiently due to
poorly working timing advance circuit.
Replace ECM.
Defective ignition coil.
Replace.
Defective CKP sensor.
Replace.
Defective ECM.
Replace.
Clogged air cleaner element.
Clean.
Clogged fuel hose, resulting in
inadequate fuel supply to injector.
Clean and prime.
Defective fuel pump.
Replace.
Defective TP sensor.
Replace.
Engine runs poorly in
high speed range
(Defective air flow
system)
Clogged air cleaner element.
Clean or replace.
Defective throttle valve.
Adjust or replace.
Defective ISC valve.
Replace.
Sucking air from throttle body joint.
Repair or replace.
Defective ECM.
Replace.
Condition
Possible cause
Correction / Reference Item
Summary of Contents for 2009 LT-A500XP
Page 2: ......
Page 4: ......
Page 14: ...00 9 Precautions ...
Page 224: ...1E 3 Engine Lubrication System EXHAUST SIDE INTAKE SIDE I931H1150003 02 ...
Page 304: ...1K 4 Exhaust System ...
Page 346: ...2D 5 Wheels and Tires ...
Page 438: ...3D 26 Propeller Shafts ...
Page 482: ...4D 6 Parking Brake ...
Page 512: ...5A 28 Automatic Transmission ...
Page 624: ...Prepared by December 2008 Part No 99500 44080 03E Printed in U S A 624 ...