Wierd PCM issue

Reply Subscribe

Thread Tools

Search this Thread

Nov 16, 2010 | 07:00 PM

plgebbia

Thread Starter

Posting Guru

Joined: Mar 2008

Posts: 1,537

Likes: 0

From: Dongola, IL

Wierd PCM issue

Any of you that saw my died and won't restart thread know that I changed my PCM. I used a 1997 PCM, and I did notice a difference in power (more power) But, with this PCM, it goes romp, romp, romp, every time I start it, hot or cold, and it will only quit romping once I give it a little throttle, then its fine. With the original PCM, it would only romp on real cold starts.

I'm confused????

Nov 16, 2010 | 07:07 PM

bad12jr

Posting Guru

Joined: Dec 2008

Posts: 2,347

Likes: 1

From: Maysville, Kentucky

Could it be a cali pcm. Could be burned for splits. You might have to get it reflashed.

Nov 16, 2010 | 07:07 PM

Action4478

Hotshot

Joined: Aug 2006

Posts: 10,764

Likes: 39

Is your truck a cali model, was the PCM for a cali model ?

Are you running an ICP mod (10 k) or what ever ?...

Nov 16, 2010 | 07:08 PM

bad12jr

Posting Guru

Joined: Dec 2008

Posts: 2,347

Likes: 1

From: Maysville, Kentucky

I win lol

Nov 16, 2010 | 08:17 PM

RRranch

Posting Guru

Joined: Nov 2007

Posts: 2,158

Likes: 0

From: West Texas

A PCM from an automatic truck will do it too. I know. It needs to be reflashed for a 5 speed if you want it to be right.

Nov 16, 2010 | 08:40 PM

Action4478

Hotshot

Joined: Aug 2006

Posts: 10,764

Likes: 39

Quote:

Originally Posted by RRranch

A PCM from an automatic truck will do it too. I know. It needs to be reflashed for a 5 speed if you want it to be right.

An auto PCM just ignores the trans ...

Nov 16, 2010 | 08:46 PM

plgebbia

Thread Starter

Posting Guru

Joined: Mar 2008

Posts: 1,537

Likes: 0

From: Dongola, IL

It is not a cali PCM and my motor is not a cali motor.

I do not have any ICP mods at all. it does the same romp, romp with the ICP unplugged.

It is an auto PCM if that makes any difference...

Thanks guys,

BTW, this 97 PCM will not communicate with my AE, but the old PCM did

Top 10 Ford Truck Tragedies

Joe Kucinski

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

Brett Foote

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Michael S. Palmer

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Verdad Gallardo

10 Best Ford Truck Engines We Miss the Most!

Joe Kucinski

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Brett Foote

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Michael S. Palmer

10 Most Surprising 2026 Ford Truck Features!

Joe Kucinski

Top 10 Ford Trucks Coming to Mecum Indy 2026

Brett Foote

5 Best / 5 Worst Ford Truck Wheels of All Time

Joe Kucinski

Nov 17, 2010 | 10:37 AM

bad12jr

Posting Guru

Joined: Dec 2008

Posts: 2,347

Likes: 1

From: Maysville, Kentucky

Are any of the pins corroded or dirty. A bad connection on a pin or two?

Nov 17, 2010 | 10:50 AM

#10

Hussler

Postmaster

Joined: Sep 2007

Posts: 4,195

Likes: 6

From: Medford Oregon

Check your cigarette lighter fuse.
It powers the OBDII port.

Nov 17, 2010 | 11:45 AM

#11

tjbeggs

Post Fiend

Joined: Apr 2004

Posts: 12,835

Likes: 3

From: Silver Lake Dunes, MI

I would bet its cause its an auto pcm. and Auto will do the same thing if the neutral safety switch is bad.

Nov 17, 2010 | 12:08 PM

#12

Action4478

Hotshot

Joined: Aug 2006

Posts: 10,764

Likes: 39

Quote:

Originally Posted by tjbeggs

I would bet its cause its an auto pcm. and Auto will do the same thing if the neutral safety switch is bad.

I have always been told the autos in a 5 speed just ignore trans input , I think it was from Bill ..

BTW , did you hear back from Bill ?..

Nov 17, 2010 | 12:17 PM

#13

plgebbia

Thread Starter

Posting Guru

Joined: Mar 2008

Posts: 1,537

Likes: 0

From: Dongola, IL

Quote:

Originally Posted by bad12jr

Are any of the pins corroded or dirty. A bad connection on a pin or two?

No, I don't think so.

Quote:

Originally Posted by Hussler

Check your cigarette lighter fuse.
It powers the OBDII port.

I'll check that, but my scanner did the same thing when this PCM was in a different truck.

Quote:

Originally Posted by tjbeggs

I would bet its cause its an auto pcm. and Auto will do the same thing if the neutral safety switch is bad.

This has to be it, because there are no other differences that I know of.

Thanks for the input guys!

Nov 17, 2010 | 05:04 PM

#14

tjbeggs

Post Fiend

Joined: Apr 2004

Posts: 12,835

Likes: 3

From: Silver Lake Dunes, MI

Quote:

Originally Posted by Action4478

I have always been told the autos in a 5 speed just ignore trans input , I think it was from Bill ..

BTW , did you hear back from Bill ?..

Not sure on that Rick. Doesn't make sense to me that that would be the case but if Bill says I would believe it.

I have not heard from Bill. You haven't either?