Posted By: CRT
Mopar pcm for 6.4 - 01/12/19 03:57 AM
I bought the mopar kit to wire my 6.4
It ran killer all summer. Now has what feels like a timing issue. Is the there a company that can test and or repair a Chrysler pcm ?
Posted By: sgcuda
Re: Mopar pcm for 6.4 - 01/12/19 04:01 AM
Is there a diagnostic port that you can pull codes from? Maybe just a sensor malfunction.
Posted By: CRT
Re: Mopar pcm for 6.4 - 01/12/19 04:18 AM
Yes. It's got a code for a large vacuum leak. Its popn like it has a timing issue
Posted By: astjp2
Re: Mopar pcm for 6.4 - 01/12/19 04:26 AM
ModuleGods PCM, jeep guys are using them for the 05/06 PCM's that are failing like crazy and their stuff seems to work better than others.
https://modulegods.com/powertrain-control-module-pcm/
Posted By: Bad340fish
Re: Mopar pcm for 6.4 - 01/12/19 01:35 PM
Have you checked fuel pressure, it could be very lean causing your problems?
What code does it have?
Posted By: dvw
Re: Mopar pcm for 6.4 - 01/12/19 02:18 PM
We have very few PCM issues that I've seen. What is the exact fault (Pxxxx?) you have?
Doug
Posted By: TRENDZ
Re: Mopar pcm for 6.4 - 01/12/19 02:34 PM
Fuel pressure. Lean always pops through the intake.
Posted By: CRT
Re: Mopar pcm for 6.4 - 01/12/19 05:52 PM
Have a gage on the cowl 58 psi. Others feel it may be a valve spring. I am going to pull off the valve covers and look
Posted By: sgcuda
Re: Mopar pcm for 6.4 - 01/12/19 06:15 PM
Valve spring is a very good possibility. Haven't seen that issue on the 6.4, but the 5.7's are a regular in our shop. Runs very rough, if it runs at all. It's amazing what a broken valve spring will cause the electronics to default to. Not just a simple fix anymore. You have to think it through. If it's a plastic intake manifold, suspect a vacuum line that fell off, crack, glued in plug that fell out. Is the idle speed higher than normal? If it is, I would suspect an intake issue. If not, I would be looking at valve springs, bent pushrods, etc...