I'm starting to get frustrated.

let me tell you whats up.

its a 1996 chrysler concorde with a 3.5 litre.

We've got a cranking, no start condition. We seem to have no spark. we've tested crank sensor ground, power, and signal at sensor and pcm. We've checked the same for cam sensor both seem to befine.We checked primary and secondary in the coils; all in spec. we figured it wasn't the auto shut down relay because fuel pump primes, but we switched around some relays anyway just to see if it did anything, we got nothing. we've looked for loose grounds and thnk we got everything grounded okay.

I really dont' know what else to check. the only thing left is the PCM as the ignition module is up-integrated into the PCM.

anyone have any ideas??

 

Sounds like you know your way around in there Hung.

The one and only time our 94 LHS 3.5L has not started in 13 years was the crank sensor and that's not even for sure.
After only cranking one day last year I towed it to a garage. They said it started right up and they drove it a few times with no problems.
I told them I don't want it back for fear it may not start again and that's another trip on the tow truck. So they replaced the crank sensor since it's a common problem and mine was original.

Unless you are well versed at testing various sensors you need to read the codes or else you'll just frustrate yourself guessing. That's most anything from Ford, Dodge or anything made in the last 15-20 years.

I've restored a few older musclecars, did many repairs on Mustangs, maintenance on all our cars. Lots of engine swaps etc but when it comes time for diagnoising computer controlled cars I take them in.

 

I guess i'll just have to get a scan tool and do that. I'm at my wits end. Thanks.

 

well, we've tested everything, did flash diagnostics (check engine light blinks code numbers). Nothing.

Pretty sure we've narrowed it down the the ignition module, so, gonna go hunt for a new PCM

 

If none of the good suggestions already posted here help you might try:
http://www.dodgeforum.com/

 

A few years ago I bought a wrecked 300M and it did the same thing. It would crank all day but no spark turns out the key has a chip in it and the place I bought the car from only game me the Va-lea(sp) key. SO what I'm saying is make sure your using the right key the keys where identical just one has a chip in it and one doesn't. I had to take the car to the dealer to get the new keys made.[:@]