Are all pcm's the same?
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Junior User
Joined: Oct 2007
Posts: 55
Likes: 0
From: Vancouver, B.C. Canada
Are all pcm's the same?
I was going to put my pcm in my early 99 truck to see if it is a pcm problem. Is there any differenc es or will the 02 pcm work in an early 99?
Post Fiend
Joined: Apr 2007
Posts: 7,241
Likes: 1
From: Powder Springs, East TN
Ask Hucka1a or Rons Powertroke on how much of a boost they had from the changing out of PCMs make sure you get the code off of it so when you go to put a chip on there Jody can tune for the PCM.
Butt-Head
Joined: Apr 2004
Posts: 9,432
Likes: 2,919
From: Reed Point, MT
A PCM out of an 02 will not work in an early 99. The communication protocol is different between 99-01 and 02-03.
However, if you have an automatic early 99, a PCM out of an automatic 99.5-01 will work provided the emissions are compatible (Cali****fornia/Federal)
However, if you have an automatic early 99, a PCM out of an automatic 99.5-01 will work provided the emissions are compatible (Cali****fornia/Federal)
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
Yep, Cody got it.
In 2002 Ford changed several inputs for the PCM, including the tach and a few others. So swapping a PCM from an 02 to an early 99 will cause some issues. At the very least you'll end up with CEL's constantly illuminated.
In 2002 Ford changed several inputs for the PCM, including the tach and a few others. So swapping a PCM from an 02 to an early 99 will cause some issues. At the very least you'll end up with CEL's constantly illuminated.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Oh crud.... Sorry for missing that. Never even considered it -- but after I wrote that, something bugged me, especially since we have a lot of different stuff in the dash and all.
Thanks for the correction...
Thanks for the correction...
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Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
I believe the connector changed as well, so an 02 PCM won't even plug into an 01 or prior harness.
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