fuel, but no spark

[16th hippy]

a coworker has a lumina, 92 or 93 model with the 3.1L. ran fine, he took a nap, then would not restart. didn't have time to look at it real close the other day, but fuel pressure is good, but no spark on any cylinder. prime suspect in my mind is crank sensor, but need to diagnose it before throwing parts at it cause he is on limited budget. basically, need to know which wire is the crank trigger going into the ICM/PCM, and the power/ground wires for the icm would be good to know as well. all fuses are good. just no spark anywhere. if someone can point me to a wiring diagram for the ignition system, that would be sweet.

[jdl]

How did you check fuel pressure? With the engine cranking, if there is no rpm signal, the pump won't run. Yes, there will be an initial prime, key on, for about 2 seconds, then, with the engine cranking, there has to be an rpm signal. The rpm signal comes from the crank sensor.

You can go to autozone.com and click on (vehicle repair guides) follow the links, they have wiring diagrams.

[maxwedge]

Basic info and diagrams can be found at autozone.com, repair guides.

[16th hippy]

funny thing. looked at autozone before i posted first time and couldn't find the diagrams anywhere. told the guy my best guesses, he decided to go get a crank sensor and put it in. i had checked prime pressure to the rail, but no fuel was going into cylinders, along with no spark. that's why i was thinking crank sensor. told him to get the haynes book from autozone so i could use the diagrams. he got that and a crank sensor. called me up, had fuel to cylinders, but still no spark. all wires checked out good(thanks diagram), so had to be ignition module. replaced that, and fired right up. so may have been both, but in any case, car is running. just before i made this post, went to AZ.com and found the blasted diagrams....go figure.