At some point every Chevrolet Camaro will have trouble starting. And there can be many reasons why the vehicle won’t begin to work. To properly diagnose a Camaro that won’t start, first identify the type of starting issue the vehicle is experiencing. Use this troubleshooting guide to trace and correct faults on a Camaro that will not turn on.
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Engine Will Not Crank When Attempting To Start
- Battery post and cable clamps are corroded or loose. Inspect battery cable clamps and battery posts for corrosion, clean and torque cable clamps if necessary.
- Battery is faulty or discharged. Test battery with multimeter and replace if needed. Use a one or two amp battery charger to recharge the battery.
- Automatic transmission shifter lever is not fully engaged. Ensure shifter lever is moved into position so the vehicle can come into operation.
- Clutch pedal not fully depressed when attempting to start the car. Make sure the clutch pedal is fully depressed when attempting to start the vehicle.
- Faulty ignition switch. Test ignition switch and replace if defective.
- Starter solenoid faulty. Test starter motor, solenoid and relay. Replace parts as needed.
- Defective starter motor. Test starter motor and starter relay, replace if necessary.
- Faulty wiring in the starting circuit. Check for frayed, loose, cut or disconnected wires.
- Damaged or worn starter pinion or flywheel teeth. Replace necessary parts.
- Starter motor pinion wedged in the flywheel ring gear.
Engine Cranks But Will Not Start
- Faulty Camshaft Position Sensor CMP or Crankshaft Position Sensor CKP. Test the sensors for continuity using a digital multimeter. Replace sensors if necessary.
- Improperly gapped spark plugs, worn plugs or broken porcelain insulator. Gap plugs to factory specifications. Replace worn or broken spark plugs.
- Broken timing chain. To replace timing chain, refer to timing chain inspection, removal and installation procedures in service manual.
- Fuel tank empty. Refill tank with gasoline.
- Battery discharged. Use a one or two amp battery charger to recharge the batter (Note: the engine will often rotate slowly if the battery is not fully charged).
- Battery terminals loose or corroded. Tighten battery cable clamps and remove corrosion.
- Faulty fuel injectors, fuel pressure regulator or fuel pump. Test fuel injector resistance with multimeter. Test fuel pressure with pressure gauge. To check fuel pump operation, sit in vehicle and turn key to ON position but do not start vehicle. Listen for the sound of the fuel pump activating. Hearing the fuel pump turn on means it’s functioning.
- Ignition system problems. Test the ignition system components; crankshaft position sensor CKP, knock sensor KS, powertrain control module PCM, camshaft position sensor CMP, spark plugs, ignition switch, individual ignition coils, battery.
Engine Hard To Start Up When Cold
- Faulty or discharged battery. Test battery with multimeter and replace defective battery if needed. Recharge battery with a one or two amp battery charger.
- Fuel system not functioning normally. Inspect fuel system and test individually fuel system components; electronic fuel pump, high pressure fuel pump (if equipped), fuel lever sending unit, fuel injectors, fuel rails, Powertrain Control Module PCM, and fuel lines.
- Bad intake air temperature sensor or coolant temperature sensor. Test coolant temperature sensor with multimeter. Test the intake air temperature sensor. Replace parts if needed.
- Ignition system faulty. Test ignition system components; crankshaft position sensor CKP, knock sensor KS, powertrain control module PCM, camshaft position sensor CMP, spark plugs, ignition switch, individual ignition coils and battery.
Engine Hard to Fire Up When Hot
- Clogged or dirty air filter. Replace or clean air filter and check for blockage.
- Fuel system failing to function normally. Test ignition system components; crankshaft position sensor CKP, knock sensor KS, powertrain control module PCM, camshaft position sensor CMP, spark plugs, ignition switch, individual ignition coils and battery.
- Battery connections corroded. Clean battery terminals and battery cable clamps.
Engine Starts But Shuts Off Immediately
- Insufficient supply of fuel reaching the fuel injectors. Test fuel system components.
- Vacuum leak at the gasket between throttle body and intake manifold/plenum. There are a few different ways to test for a vacuum leak. Refer to service manual for proper testing procedures.
|NOTE: This troubleshooting guide applies to the Chevrolet Camaro 2010-2011 3.6L V6 engine (LLT), 2010-2011 3.6L V6 engine (LFX), 2012, 2013, 2014, 2015 3.6L V6 engine, 2010-2015 6.2L V8 engine (LS3) SS, 2010-2015 6.2L V8 engine (L99) SS, 2012-2015 6.2L V8 engine (LSA) and supercharged ZL1 models.|