PCM Issues with Modded motor?
Thread Starter
Instructor
Joined: May 2009
Posts: 108
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From: Mechanicsville Maryland
PCM Issues with Modded motor?
Has anyone experienced PCM issues when tuning a 1998 C5 with a FAST 102 intake Nick Williams 102 TB, Fast fuel rails. Linginfelter 102 MAF.. 55lb injectors, cam, heads, longtubes, etc?
Melting Slicks
Joined: Nov 2009
Posts: 2,922
Likes: 219
From: West Branch, MI
mhunter1788, I've got virtually every one of those mods on my 98 except the TB is the 90mm LS2 (ported) and the injectors are the 36lb Ford red tops. I stilll have the 98 PCM as well. I have everything else you asked about, new heads, cam, FAST102, headers, etc... No problems with PCM at all. Car made 430 with my A4 and 3.15 gears. Are you having some issues or was this a general question?
Melting Slicks
Joined: Nov 2009
Posts: 2,922
Likes: 219
From: West Branch, MI
I had idle surging issues as well when my mechanic did the engine work. Took a while but found the problem. What was it? 2 of the injectors had not sealed properly. It was creating a vacuum leak. I suspect you'll find a leak somewhere as well. It's not uncommon.
Instructor
Joined: Jan 2012
Posts: 193
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Hmm interesting... had to bring this one back from the dead.. have all the same issues here. Plus all the same mods. 102 tb and intake,etc... Mine revs high at times and then wants to die out others. Nothing is done in particular to cause it though.
I will have to check for vacuum leak.
OP, You ever figure out what happened with yours?
I will have to check for vacuum leak.
OP, You ever figure out what happened with yours?
