PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Fast classic issue

Thread Tools
 
Search this Thread
 
Old Apr 3, 2010 | 12:04 PM
  #1  
LT4vert's Avatar
Thread Starter
TECH Fanatic
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (3)
 
Joined: Feb 2002
Posts: 1,843
Likes: 30
From: South Bend , IN
Default Fast classic issue

Im having a issue with a Fast classic ecu and fast is not being that helpful . Problem is the car absolutely will not rev past 3500-3900 rpms ( highest read on the log was 3900 ) , at that point the motor just studders and pops . Ive been thru ALL the wiring with a fine tooth comb and just to make sure Im not having any interference issues I used a relay board to give the ignition box , opti switched 12v and the fast switched 12 volt all their own switched powers off the battery . No possible chance of the wire interference issue . In this process the ign. box has also been eliminated as a possible problem . Everything leads back to a pcm issue , that the part Fast isnt being much help with . So I opened the box up last nite and found 3 resitor logs with either heat discoloration or a burn mark all the way thru coating .

I took a pic of the board and marked where the problem areas are on the resistor logs . Is anyone familiar enuff with the electronics of these ecu's to say this is probably my smoking gun ? I can search the resistor logs by the part #'s on them and replace them , but a friend of mine cautioned that part# printed on the body could be the same for several different resistor values .

***I screwed up editing this photo , RED=burn thru and Pink=discoloration


If anyone really knows the circuitry of these ECUs well , please chime in . Right now I really just drive this car off a cliff and watch it burn
Reply
Old Apr 4, 2010 | 08:14 AM
  #2  
Old Geezer's Avatar
TECH Senior Member
iTrader: (3)
 
Joined: Jun 2004
Posts: 5,639
Likes: 71
From: GA, USA
Default

I think Craig Smith 'fixes" the classic units..Don't have a fone #, but someone on the forum should know how to contact him.
I have his email addy. Don't know if it's still working.
Pm me for it.Also, may find some help over on www.turbobuick.com. Lots of FAST users there.
Reply




All times are GMT -5. The time now is 07:04 AM.

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