|
|
Content .. 1223 1224 1225 1226 ..
Burned solenoid contacts Replace solenoid Faulty starter Replace starter Starter Engages Engine Only Momentarily Engine timing too far advanced See Ignition Timing in TUNE-UP article Overrunning clutch not engaging properly Replace overrunning clutch. See STARTER article Broken starter clutch See STARTER article Broken teeth on engine flywheel Replace flywheel and check starter pinion gear for damage Weak drive assembly thrust spring See STARTER article Weak hold-in coil See Bench Tests in STARTER article Starter Drive Will Not Engage Defective point assembly See Testing in STARTER article Poor point assembly ground See Testing in STARTER article Defective pull-in coil Replace starter solenoid Starter Relay Does Not Close Dead battery Charge or replace battery as necessary Faulty wiring Check all wiring and connections leading to relay Neutral safety switch faulty Replace neutral safety switch Starter relay faulty Replace starter relay Starter Drive Will Not Disengage Starter motor loose on mountings Tighten starter attach bolts Worn drive end bushing See STARTER article Damaged engine flywheel teeth Replace flywheel and starter pinion gear for damage
2008 Chevrolet Silverado 1500 GENERAL INFORMATION Trouble Shooting - Basic Procedures
Drive yolk return spring broken or missing Replace return spring Faulty ignition switch Replace ignition switch Insufficient clearance between winding leads to solenoid Replace starter solenoid Starter clutch not disengaging Replace starter clutch Ignition starter switch contacts sticking Replace ignition switch Starter Relay Operates but Solenoid Does Not Faulty solenoid switch, switch connections or relay Check all wiring between relay and solenoid or replace relay or solenoid as necessary Broken lead or loose soldered connections Repair wire or wire connections as necessary Solenoid Plunger Vibrates When Switch is Engaged Weak battery Charge or replace battery as necessary Solenoid contacts corroded Clean contacts or replace solenoid Faulty wiring Check all wiring leading to solenoid Broken connections inside switch cover Repair connections or replace solenoid Open hold-in wire Replace solenoid Low Current Draw Worn brushes or weak Replace brushes or brush springs as necessary High Pitched Whine During Cranking Before Engine Fires but Engine Fires and Cranks Distance too great between starter pinion and flywheel Align starter or check that correct starter and flywheel are being used High Pitched Whine After Engine Fires With Key released. Engine Fires and Cranks Distance too small between starter pinion and flywheel Flywheel runout contributes to the intermittent nature
2008 Chevrolet Silverado 1500 GENERAL INFORMATION Trouble Shooting - Basic Procedures
TUNE-UP TROUBLE SHOOTING - GAS ENGINE VEHICLES BASIC SPARK PLUG TROUBLE SHOOTING CHARTS NOTE: This is GENERAL information. This article is not intended to be CONDITION & POSSIBLE CAUSE CORRECTION Normal Spark Plug Condition Light Tan or Gray deposits No Action Electrode not burned or fouled No Action Gap tolerance not changed No Action Cold Fouling or Carbon Deposits Overrich air/fuel mixture Adjust air/fuel mixture, see ENGINE PERFORMANCE section Faulty choke Replace choke assembly, see ENGINE PERFORMANCE section Clogged air filter Clean and/or replace air filter Incorrect idle speed or dirty carburetor Reset idle speed and/ or clean carburetor Faulty ignition wires Replace ignition wiring Prolonged operation at idle Shut engine off during long idle Sticking valves or worn valve guide seals Check valve train Wet Fouling or Oil Deposits Worn rings and pistons Install new rings and pistons Excessive cylinder wear Rebore or replace block Excessive valve guide clearance Worn or loose bearing Gap Bridged Deposits in combustion chamber becoming fused to Clean combustion chamber
2008 Chevrolet Silverado 1500 GENERAL INFORMATION Trouble Shooting - Basic Procedures
BASIC ELECTRONIC IGNITION TROUBLE SHOOTING CHARTS electrode of deposits Blistered Electrode Engine overheating Check cooling system Wrong type of fuel Replace with correct fuel Loose spark plugs Retighten spark plugs Over-advanced ignition timing Reset ignition timing see ENGINE PERFORMANCE Pre-Ignition or Melted Electrodes Incorrect type of fuel Replace with correct fuel Incorrect ignition timing Reset ignition timing see ENGINE PERFORMANCE Burned valves Replace valves Engine Overheating Check cooling system Wrong type of spark plug, too hot Replace with correct spark plug, see ENGINE PERFORMANCE Chipped Insulators Severe detonation Check for over-advanced timing or combustion Improper gapping procedure Re-gap spark plugs Rust Colored Deposits Additives in unleaded fuel Try different fuel brand Water In Combustion Chamber Blown head gasket or cracked head Repair or replace head or head gasket NOTE: Before diagnosing an electronic ignition system, ensure that all CONDITION & POSSIBLE CAUSE CORRECTION Engine Won't Start
2008 Chevrolet Silverado 1500 GENERAL INFORMATION Trouble Shooting - Basic Procedures
Content .. 1223 1224 1225 1226 ..
|
|
|