87 cutlass ceira 2.5 "iron duke". 65k miles. Throttle body injection, daily driver.







After a long drive it won't start for 10 to 15 min, it'* a new trick it just learned. This thing has been incredibly reliable. It happened to me at a gas station, I wasn't able to do a spark test, I cleared the codes last week. It proudly showed its new trick at school today as my wife dropped off the kids. It didn't send any codes. After it fires runs great, full power all " 98 hp " .

Just happened again, no spark the fuel pump was working. I've tried to read up on the car/engine. Ignition module? Crankshaft position sensor?


Thanks in advance for any tips on where to start? And if this is on the wrong topic, where should it go? Thanks so much.

Anything coming out of the injector during cranking?

Will it start if you spray carb cleaner into the throttle body, and die when you stop spraying?

If you definitely have no spark, does this have a distributor or direct ignition system?

If distributor, this is HEI and It could be the pickup coil or the ignition module...

If direct ignition, could be the ICM or crank sensor.........could also be a bad connection between the crank sensor and ICM(there was a TSB on this).......the crank sensor is piggy backed onto the ICM........