No Start Diagnostics🔗
Note
- No start issues occur when the engine cranks but does not start.
| Checks | Action |
|---|---|
| Preliminary Checks | N/A |
| ECU Checks | - Check for proper communication with the ECU - Check all fuses and relays for any damage - Check battery power, ignition power and ground circuits to the ECU |
| Sensor Checks | - Check the MAP sensor - Check the cam sensor for proper RPM output |
| Fuel System Checks | - Check the air intake components for any leakage - Check for proper fuel pressure |
| Ignition System Checks | - Check for proper ignition voltage output - Check the spark plugs for proper gap, cracks, heavy deposits, wet plugs, wear, and ensure to also check the ignition wires |
| Engine Mechanical Checks | Check for all of the below items: - Vacuum leaks - Improper valve timing - Low compression - Worn rocker arms - Improper valve clearance - Broken or weak valve springs - Worn camshaft lobes |
| Exhaust System Checks | Check for all of the below conditions: - Inspect the exhaust system for damaged or collapsed pipes - Check for plugged catalytic converter |