No Spark

Chrysler has very little computer trouble to begin with. To have two do the same thing is even more unlikely.

Try something stupid. The next time it doesn't start, throw a battery charger on it on low charge, then try starting it right away.

Caradiodoc

Help. I'm buried in service manuals and I can't get up!

Does your car use a Sentry key? That's a special gray key that's part of the anti-theft system. With this system, a special 4-digit code must be entered into the new PCM with Chrysler's DRB3 scanner that matches the code in the SKIM anti-theft module. There is nothing mentioned though about a 15 minute wait time if you don't.

If this system isn't on your car, let's go back to your previous comment about the pump turning on. Do you mean it runs for a second or two after turning on the ignition switch? That's normal, but it won't turn on again until the engine is rotating, (cranking or running). It can be hard to tell sometimes, so instead, use a test light or voltmeter to meaure on the dark gren / orange stripe wire at the ignition coil during cranking. If no voltage is present, we'll figure out where to go next. One test will be to measure the voltage on the two small wires on the back of the alternator, but we'll jump into that creek when we come to it.

Caradiodoc