PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Please Help!

Thread Tools
 
Search this Thread
 
Old Oct 15, 2005 | 06:47 PM
  #1  
O'dell's Avatar
Thread Starter
Launching!
iTrader: (1)
 
Joined: Feb 2004
Posts: 214
Likes: 0
Default Please Help!

I am really struggling with getting the car running. It will fire as soon as the key is started but then it will either die right way, or find idle and run for about 5 seconds. It still has ignition while the crank is turning(during the rpm drop) I havent been able to check injectors. The pcm maintains battery, ignition, and ground, when it dies. The car keeps fuel pressure, I have tried a new mass air, iat, 02 sensors, map. The car ran fine before the turbo kit was built, only thing that changed was extending on iat and mass air wires but I have double checked those connections. Right now I have a stock tune and stock injectors untill I can get this thing to idle. Can anyone else reccomend anything that might help?TIA..
Reply
Old Oct 15, 2005 | 07:15 PM
  #2  
slow's Avatar
TECH Senior Member
20 Year Member
iTrader: (7)
 
Joined: Dec 2001
Posts: 6,150
Likes: 7
From: Orlando
Default

check the ECT sensor on the front of the drivers side head.

I pulled one off for a friend when we did plug wires, and forgot to reconnect, and the car woudl not start, or start really poorly.

Ryan
Reply
Old Oct 15, 2005 | 07:34 PM
  #3  
TAQuickness's Avatar
TECH Junkie
iTrader: (28)
 
Joined: Jan 2004
Posts: 3,250
Likes: 1
From: Houston
Default

if that doesn't do it, try adjusting the idle set screw.
Reply
Old Oct 15, 2005 | 10:10 PM
  #4  
O'dell's Avatar
Thread Starter
Launching!
iTrader: (1)
 
Joined: Feb 2004
Posts: 214
Likes: 0
Default

We've pretty much boiled it down to the pcm. ECT is fine, won't start at all if it's unplugged, etc..

When it does start, it's starts fine, idle's fine and dead on, then just dies. IF you hold it at 3k rpms, sounds perfect, then dies. It maintains spark when it's trying to quit, believe the pcm is just pulling fuel/turning off injectors. You can feel them quit pulsing, then it dies moments later.
Reply
Old Oct 15, 2005 | 10:20 PM
  #5  
oange ss's Avatar
TECH Junkie
20 Year Member
iTrader: (50)
 
Joined: Jan 2005
Posts: 3,241
Likes: 6
From: Texas
Default

VATS ?? try a different key
Reply
Old Oct 16, 2005 | 02:02 AM
  #6  
black98ws6ta's Avatar
TECH Addict
iTrader: (77)
 
Joined: May 2002
Posts: 2,107
Likes: 2
From: louisville,ky
Default

The car is a 98 pcm swapped into a fd rx7, vats is bcm controlled? Everytime I have seen a vats problem the car wouldnt start, or it would just crank with no fire. This is obviously firing and running for a short amount of time.
Reply
Old Oct 16, 2005 | 12:00 PM
  #7  
oange ss's Avatar
TECH Junkie
20 Year Member
iTrader: (50)
 
Joined: Jan 2005
Posts: 3,241
Likes: 6
From: Texas
Default

if i remember correctly if there is insufficient info to the VCM for the VATS system the car will start but shutdown after about 5 seconds
Reply




All times are GMT -5. The time now is 01:58 AM.

story-0
10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

Slideshow: 10 reasons daily-driving a swap project might not be for you. Or is it?

By Michael S. Palmer | 2026-06-17 09:39:05


VIEW MORE
story-1
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-2
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-06-18 10:26:23


VIEW MORE
story-3
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-4
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-5
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-6
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-7
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-8
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-9
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