Go Back   Third Generation F-Body Message Boards > Tech Boards > TPI
Sign in using an external account
Register Forgot Password?

TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 10-26-2009, 06:56 PM   #1
Senior Member
 
Join Date: Feb 2007
Location: North Carolina
Posts: 549
Car: 1991 Pontiac GTA
Engine: L98 TPI 350
Transmission: 700R4 built by Gregs in Albuquerque
Axle/Gears: Factory 3.23 10-Bolt

Classifieds Rating: (1)
Okay, I give up. Somebody help me.

Well, for those of you who lurk the forum and read every post haha you 'might' remember I just tore the entire top end off my 91 GTA. However after its maiden voyage to the barber shop and back the battery went dead. No big deal really. Charged it, and now after a lot of trying to start I have determined, it wont.

To be exact its not that it doesnt start, it just wont start 3 out of 4 trys. And when it does it will only run for a second then die. Then on the times it chooses to run for more than 2-3 seconds and I touch the gas, it dies, otherwise it would just die at the 5 second mark anyway.

Now the indicators I have are: The fuel pump keeps priming and is pretty new (under 7k miles), so im doubting that to be a problem. I just cleaned out the injectors on tear down, so I know they are not plugged. Spark plugs are new. Timing is right on 6 degrees initial. All intake manifold work was done "right" and all bolts were torqued to speq and in order, so I dont think its a vacuum issue.

I mean really what the heck?

So this weekend I tried to start it again and I unplugged the MAP sensor hoping that would solve the issue...NOPE! Started...chugged...died.

So! Then I went into search on the forum here and came up with...ECM or ignition module. Who here can verify that? And if so, let me know the best way to test. I have a very basic multimeter and a fair amount of tools.

Thanks guys.
__________________
2nd Marine Air Wing 3rd Gener, Cherry Point NC. Semper FI
1991 Pontiac GTA L98 w/ZZ4 Heads 2960lbs
http://www.cardomain.com/ride/3840167
F-Body Demon is offline vBGarage Page   Reply With Quote
Old 10-27-2009, 01:16 PM   #2
Member
 
Join Date: Jul 2009
Location: Ontario, Canada
Posts: 157
Car: 86 IROC
Engine: 350 Vortec TPI
Transmission: 700R4
Axle/Gears: BW 3.27

Classifieds Rating: (2)
Re: Okay, I give up. Somebody help me.

This might me a long shot, but I was having issues with my car in the summer. Someone told me that it might be the alternator. I went to a local shop and they tested it out, sure enough there was tons of static on the charge, with the battery disconnected it would cause the car to do all sorts of funny things. when the battery was connected it acted like a filter. Before you go and tear into the dizzy and ecm get that thing tested. It might give a dirty signal to the ecm which is causing all sorts of other issues. Also check grounds and make sure that they are clean/attached as you might have missed one when putting it back together.

What exactly is the car doing, does it just crank over and never kicks/starts? look into the coil and see if it is getting a signal from the module. Rule of thumb always start with the easiest thing.
__________________
'86 Camaro IROC
350 with Comp Cam .480/.495 lift 212/218 duration, Vortec heads, Edelbrock Vortec TPI baseplate and Runners, 700R4 with Shift kit Long Tube's with custom Y-pipe into 3" Flowmaster, and 3.27 Borg Warner gear with Disc. Runs 13.302 @ 104mph with 1.89 60' on a Street Tire.
hrspwr is offline vBGarage Page   Reply With Quote
Old 10-28-2009, 09:27 AM   #3
Junior Member
 
Join Date: Jun 2008
Location: Easton, Pennsylvania
Posts: 61
Car: 1986 IROC Z28
Engine: 305 TPI
Transmission: 700R4

Classifieds Rating: (0)
Re: Okay, I give up. Somebody help me.

I agree, before you go throwing money into it check the basics, do you have spark, plugs wet or dry? Do you have Fuel? Check all the connections and grounds. Why'd the battery go dead? Bad alternator? Weak battery? Most of the big chains like autozone will test them for free. I've made the mistake of overlooking something I thought I'd already fixed. Don't forget parts go bad, even brand new parts...
smier is offline vBGarage Page   Reply With Quote
Old 10-30-2009, 08:21 PM   #4
Senior Member
 
Join Date: Feb 2007
Location: North Carolina
Posts: 549
Car: 1991 Pontiac GTA
Engine: L98 TPI 350
Transmission: 700R4 built by Gregs in Albuquerque
Axle/Gears: Factory 3.23 10-Bolt

Classifieds Rating: (1)
Re: Okay, I give up. Somebody help me.

Thanks guys im gonna pull the plugs and check for spark this Sunday. Too bad I have Barracks Duty all day Saturday otherwise I could get this done sooner.
__________________
2nd Marine Air Wing 3rd Gener, Cherry Point NC. Semper FI
1991 Pontiac GTA L98 w/ZZ4 Heads 2960lbs
http://www.cardomain.com/ride/3840167
F-Body Demon is offline vBGarage Page   Reply With Quote
Old 10-31-2009, 01:55 AM   #5
Member
 
danziger's Avatar
 
Join Date: Aug 2003
Location: Chesapeake, VA
Posts: 466
Car: 1991 Formula Firebird
Engine: L98 with headers/exhaust
Transmission: 700R4
Axle/Gears: 3.23 10-bolt

Classifieds Rating: (0)
Re: Okay, I give up. Somebody help me.

I will second the idea that it could be a grounding/charging issue. My Formula was doing all sorts of crazy symptoms including hunting idle, hard-starts and nearly dying upon deacceleration. Turns out a ground wire had broke free...
danziger is offline vBGarage Page   Reply With Quote
Old 11-02-2009, 12:17 PM   #6
Senior Member
 
Join Date: Feb 2007
Location: North Carolina
Posts: 549
Car: 1991 Pontiac GTA
Engine: L98 TPI 350
Transmission: 700R4 built by Gregs in Albuquerque
Axle/Gears: Factory 3.23 10-Bolt

Classifieds Rating: (1)
Re: Okay, I give up. Somebody help me.

Well no crap. I checked the grounds and one was jacked. I did my best to fix the issue and the car started up! ...and then through code 33. So currently I unhooked the battery and im letting it clear out, and I will restart it and see if the code comes back, seeing as it was a grounding issue. BTW thanks again for the help fellas.
__________________
2nd Marine Air Wing 3rd Gener, Cherry Point NC. Semper FI
1991 Pontiac GTA L98 w/ZZ4 Heads 2960lbs
http://www.cardomain.com/ride/3840167

Last edited by F-Body Demon; 11-02-2009 at 02:47 PM.
F-Body Demon is offline vBGarage Page   Reply With Quote
Old 11-02-2009, 12:17 PM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > TPI

Tags
barber, carolina, generation, north, shop
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 06:31 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2012, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.5.2
All content copyright © 1997 - 2012 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details