PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

PCM woes

Thread Tools
 
Search this Thread
 
Old Aug 2, 2022 | 06:52 PM
  #1  
TA_Freak's Avatar
Thread Starter
TECH Fanatic
10 Year Member
Photogenic
 
Joined: Nov 2011
Posts: 1,367
Likes: 144
From: Woodstock, GA
Default PCM woes

I just pulled off the PCM connectors and found a few of the pins pushed in. I re-pinned them and now the connectors don't feel like they're sitting properly and the car won't stay running. The pins I replaced look fine.
Anyone ever run into this?
Reply
Old Aug 3, 2022 | 08:56 AM
  #2  
TA_Freak's Avatar
Thread Starter
TECH Fanatic
10 Year Member
Photogenic
 
Joined: Nov 2011
Posts: 1,367
Likes: 144
From: Woodstock, GA
Default

One thing that I learned from my Dad in my youth was, "never force anything!" That and being an engineer will help in this situation. Time to just eyeball it and find out what pin(s) are clashing.
Reply
Old Aug 3, 2022 | 03:22 PM
  #3  
TA_Freak's Avatar
Thread Starter
TECH Fanatic
10 Year Member
Photogenic
 
Joined: Nov 2011
Posts: 1,367
Likes: 144
From: Woodstock, GA
Default

OK .. update. There was no problem... nothing bent or pushed in. The rocking of the connectors was due to the captive bolt in the center.
As to why it won't idle properly, could it be due to the pcm relearning the idle and TPS? It runs fine when I rev it up .... just won't idle. The pcm was disconnected for a good 30 minutes.

Reply
Old Aug 3, 2022 | 05:26 PM
  #4  
TA_Freak's Avatar
Thread Starter
TECH Fanatic
10 Year Member
Photogenic
 
Joined: Nov 2011
Posts: 1,367
Likes: 144
From: Woodstock, GA
Default

OK ... problem solved. I put the IAC Coil A high into an unused place. It belonged in pin 79. All is well with the world again.
Reply
Old Aug 4, 2022 | 07:25 PM
  #5  
rpturbo's Avatar
TECH Addict
15 Year Member
Photogenic
Liked
Loved
iTrader: (47)
 
Joined: Nov 2008
Posts: 2,422
Likes: 223
From: A-Town, Ill side
Default

Glad to hear you got it figured out. 👍
Reply




All times are GMT -5. The time now is 11:16 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE