Ignition Timing
- Start and warm engine to normal operating temperature (needle is in middle of coolant gauge). Operate engine at 2000 RPM for 2 minutes. Perform self-diagnostic procedure and check for smooth engine operation. See G - TESTS W/ CODES article in the ENGINE PERFORMANCE Section.
- On G20, turn engine off, disconnect throttle position sensor connector and restart engine. On all models, increase engine speed to 2000 RPM, 2 or 3 times, then allow engine to return to idle.
- Connect timing light to cylinder No. 1 spark plug cable. Check ignition timing. See IGNITION TIMING table. If ignition timing is incorrect, adjust by loosening distributor mounting bolts and turning distributor. With ignition timing correctly set, check idle speed and mixture. See IDLE SPEED & MIXTURE. On G20, reconnect throttle position sensor connector.
IGNITION TIMING (Degrees BTDC@RPM)
| Application |
Specification |
| G20 |
13-17@700-800 |
| M30 |
13-17@750-850 |