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#2605210 - 01/11/19 08:57 PM Mopar pcm for 6.4
CRT Offline
master

Registered: 01/20/03
Posts: 2743
Loc: Cedar Lake IN
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 ?
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#2605212 - 01/11/19 09:01 PM Re: Mopar pcm for 6.4 [Re: CRT]
sgcuda Offline
master

Registered: 01/28/05
Posts: 4111
Loc: Charlotte, North Carolina
Is there a diagnostic port that you can pull codes from? Maybe just a sensor malfunction.

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#2605225 - 01/11/19 09:18 PM Re: Mopar pcm for 6.4 [Re: CRT]
CRT Offline
master

Registered: 01/20/03
Posts: 2743
Loc: Cedar Lake IN
Yes. It's got a code for a large vacuum leak. Its popn like it has a timing issue
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#2605227 - 01/11/19 09:26 PM Re: Mopar pcm for 6.4 [Re: CRT]
astjp2 Offline
master

Registered: 01/18/11
Posts: 4477
Loc: Utah and Alaska
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/


Edited by astjp2 (01/11/19 09:29 PM)
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#2605313 - 01/12/19 06:35 AM Re: Mopar pcm for 6.4 [Re: CRT]
Bad340fish Offline
master

Registered: 01/20/03
Posts: 5964
Loc: Tulsa OK
Have you checked fuel pressure, it could be very lean causing your problems?

What code does it have?
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#2605318 - 01/12/19 07:18 AM Re: Mopar pcm for 6.4 [Re: CRT]
dvw Offline
master

Registered: 03/16/06
Posts: 7371
Loc: MI, usa
We have very few PCM issues that I've seen. What is the exact fault (Pxxxx?) you have?
Doug

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#2605320 - 01/12/19 07:34 AM Re: Mopar pcm for 6.4 [Re: CRT]
TRENDZ Offline
top fuel

Registered: 01/24/05
Posts: 1797
Loc: Milwaukee WI
Fuel pressure. Lean always pops through the intake.
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#2605369 - 01/12/19 10:52 AM Re: Mopar pcm for 6.4 [Re: CRT]
CRT Offline
master

Registered: 01/20/03
Posts: 2743
Loc: Cedar Lake IN
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
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#2605388 - 01/12/19 11:15 AM Re: Mopar pcm for 6.4 [Re: CRT]
sgcuda Offline
master

Registered: 01/28/05
Posts: 4111
Loc: Charlotte, North Carolina
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...

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