PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

can anyone diagnose thsi problem

Thread Tools
 
Search this Thread
 
Old Mar 10, 2004 | 03:12 PM
  #1  
jruss's Avatar
Thread Starter
TECH Addict
 
Joined: Jun 2003
Posts: 2,099
Likes: 0
From: Houston,TX
Default can anyone diagnose thsi problem

I just got my pc back from AMS installed it, went to crank car ,wouldnt crank. The fuel pump relay switch(drivers side fuse box engine bay) hums clicks . I bought a new relay it made no difference . What could possibly be wrong ???
Reply
Old Mar 10, 2004 | 07:32 PM
  #2  
GrapeApe's Avatar
11 Second Club
 
Joined: Aug 2003
Posts: 220
Likes: 0
From: Brew City
Default

pcm ground ? 3 wires on the back of the drivers side head "check those"
and the obvious "battery conn." or could be a loose starter wire --or the pcm plug "2 bolts" is not seated right --or the worst case senario they fried your pcm--or the pcm ing. and/or the pcm bat fuse blew "right by the relay for the F.P."-i hope the bat. was disconnected when you put the pcm back in ---those are my guesses--or it could be the neutral saftey switch
Reply
Old Mar 10, 2004 | 07:35 PM
  #3  
jruss's Avatar
Thread Starter
TECH Addict
 
Joined: Jun 2003
Posts: 2,099
Likes: 0
From: Houston,TX
Default

battery was disconected when I reinstalled pcm.where would the neutral safety switch be ?
Reply
Old Mar 10, 2004 | 07:58 PM
  #4  
GrapeApe's Avatar
11 Second Club
 
Joined: Aug 2003
Posts: 220
Likes: 0
From: Brew City
Default

not sure i would guess under the counsole but try starting in it nuetral and then try slamming it into park----but it sure sounds like a bad ground --i had one and had a goofy whine comming from the relay box--it was the ground on top of the radiator satle lil black wire with a 10mm bolt --right by the relay box can miss it--if thats not it try cranking on all those lil grounds you see on the pass. shock tower and any other ones you see
Reply
Old Mar 10, 2004 | 08:11 PM
  #5  
jruss's Avatar
Thread Starter
TECH Addict
 
Joined: Jun 2003
Posts: 2,099
Likes: 0
From: Houston,TX
Default

well I disconnected pcm again and then hooked battery back up also no fuses were blown I guess I will go ground hunting...the car will not start in N also and all wires seem to be grounded just fine .

Last edited by jruss; Mar 10, 2004 at 09:59 PM.
Reply
Old Mar 12, 2004 | 06:30 PM
  #6  
jruss's Avatar
Thread Starter
TECH Addict
 
Joined: Jun 2003
Posts: 2,099
Likes: 0
From: Houston,TX
Default

Jayson at MTI confirmed PCM was fried
Reply
Old Mar 13, 2004 | 08:52 AM
  #7  
GrapeApe's Avatar
11 Second Club
 
Joined: Aug 2003
Posts: 220
Likes: 0
From: Brew City
Default

Damn "I kinda thought that!" but i was trying to be more postive--damn dude that sucks--is AMS going to replace it?
Reply




All times are GMT -5. The time now is 02:02 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