'98 GMC Safari - 4.3 vortec; 140K; No previous codes or issues; Started after sitting for 8 hours in heavy rain. Ran for 90 seconds (just long enough for me to reach the parking lot entrance), and as I pressed the gas pedal to accelerate into traffic, the engine shut down. No stumble, or bog, no odd sounds, just like the ignition had been turned off.
Crank, no start. After 3 or 4, 10 second cranking sessions, fuel could be smelled from the tail pipe.
pulled coil wire from cap and placed end next to intake bolt, cranked and NO SPARK.
pulled Dis. cap, and cranked. Rotor turns. attached DVOM to outer wires for cam sensor and verified ac hertz while cranking.
I need ignition system trouble shooting tips.
I have no spec.'s or procedures for checking the coil, or otherwise checking the rest of the ignition system, but I have a Fluke 78, and I am good with directions. GM Tech's - Help me find my missing sparks