PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Fried PCM

Thread Tools
 
Search this Thread
 
Old Apr 10, 2013 | 07:19 PM
  #1  
xXSilencerXx's Avatar
Thread Starter
TECH Resident
iTrader: (4)
 
Joined: Feb 2007
Posts: 794
Likes: 0
From: Manassas, VA
Default Fried PCM

So I wanted to try some idle adjustments and data logging to fix a surging/stalling idle on my car.

I read off the current tune and saved it, wrote the new tune to the PCM. Next I opened the scanner, with the cfg file that I wanted to use. I hit start scan, and like a noob I went to start the car without realizing the program has some initializing sequence before actually scanning. There was some lag between this sequence and me hitting start. Any way the car made a horrendous noise and won't turn over. It almost sounds like a hammer hitting something really fast. I'm not sure what it's doing actually, it makes a really weird noise from the engine bay. After this I thought maybe the new tune I put on there was jacked and tried to just put it back to the way it was and now it can't find the interface.

I tried disconnecting the battery to no avail. Now when the battery is plugged in there a clicking noise coming from the dash and it makes the same horrendous noise from the engine bay when I try to start it. What is the constant clicking noise from the dash? It almost sounds like the turn signals, but it's separate from them, I already checked that.

Is my PCM toast? This is on a 1998 Trans Am. If so any ideas where to get a replacement?
Reply
Old Apr 10, 2013 | 07:49 PM
  #2  
xXSilencerXx's Avatar
Thread Starter
TECH Resident
iTrader: (4)
 
Joined: Feb 2007
Posts: 794
Likes: 0
From: Manassas, VA
Default



After watching that a few times, I'm thinking dead battery. I'll try to jump it tomorrow.

Last edited by xXSilencerXx; Apr 10, 2013 at 08:38 PM.
Reply




All times are GMT -5. The time now is 09:23 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