WELCOME!
   

Go Back   PY Online Forums - Bringing the Pontiac Hobby Together > PY Welcomes 1993-02 Firebird/Trans Am Owners > 93-02 Race Tech

93-02 Race Tech Keeping the Pontiac name alive on the track.

Reply
 
Thread Tools Display Modes
  #1  
Old 11-25-2010, 03:25 PM
steveopolus steveopolus is offline
Senior Member
 
Join Date: May 2001
Location: Stuart, FL
Posts: 115
Default 95 TA Loading Up

Happy Thanksgiving to all.

My 95 TA is acting up and is very frustrating to find the problem.

Symptoms-car will run fine for quite a while after reaching normal running temp. Will run fine 20-30 minutes. After this period of time it starts to bump a little at idle. Put it in nuetral rev it up to clear it and it will be fine. Continue on for a little longer and all of a sudden without warning at idle, it will go full fuel, load up, backfire out the intake, and eventually die. Acts like a carb motor with a stuck float. It will restart and you can clear it out, but it will happen with continouing frequency. Let the car sit 3-4 hours and the process starts over.

I have 28 years experience working on classic Pontiacs and own a Pontiac specific shop. I understand mechanical and electrical systems very well, but until obtaining this car for myself have no previous experience on the LT1. I have limited computer controlled experience on anything later than 1986.

Before obtaining the car, it sat for about 2 years. I did all the obvious, drained tank, new fuel pump, new fuel filter, fluids, hoses, belts.

Fans did not work so there is a new temperature switch installed.

The car ran fine for approx 200 miles.

There are no codes, no history, and no check engine light. Alternator is charging properly. Went through all the ground connections and cleaned-retightened.

I went for the obvious, MAP, MAF, O2 sensors. Checked EGR for proper operation.
MAP was completely plugged shut and thought that was the problem. Replaced, but did not fix. Replaced O2's, MAF because of 133,000 miles

Previous owner says plugs, wires, and opti changed about 12,000 miles ago.

Anyone had this proble? Know what it is?

Thanks
Reply With Quote
  #2  
Old 01-04-2011, 07:17 PM
Cammer-6 Cammer-6 is offline
Ultimate Warrior
 
Join Date: Jan 2004
Location: central Fla
Posts: 8,356
Default

have you put a fuel pressure gauge on it and observed while it acts up?
My guess is FPR or the pump
__________________
Everything comes and goes
Pleasure moves on too early
And trouble leaves too slow
Reply With Quote
  #3  
Old 07-03-2011, 11:10 PM
Formulabruce's Avatar
Formulabruce Formulabruce is offline
Ultimate Warrior
 
Join Date: Nov 2004
Location: North East of AMES PERFORMANCE, in the "SHIRE"
Posts: 9,354
Default

Curious what this turned out to be?
__________________
"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather
Reply With Quote
  #4  
Old 07-05-2011, 01:11 PM
Captainofiron's Avatar
Captainofiron Captainofiron is offline
Chief Ponti-yacker
 
Join Date: Apr 2007
Location: Austin, TX
Posts: 648
Default

Quote:
Originally Posted by Formulabruce View Post
Curious what this turned out to be?
+1

My guess would be either fuel pressure regulator related (reg itself or the vacuum that operates it)

the pressure at teh test port should be ~41-47 psi without the vacuum on it.
__________________
www.fquick.com/Captainofiron

68 Firebird 400, YC 400, Hbeam rods, ported 670 heads (2.11i, 1.77e valves), 1.65 RRs, Torker 2 intake, Nodular Crank, Eaton Limited Slip, Richmond 3.55 gears, M-20 M4
97 Trans Am WS6, LT1, M6, FLP LTs, Cutouts, Flowmaster catback, Jet Airfoil, K&N air filter, MSD Opti and Coil
14 Fiat 500e 83kW motor, 24kWh lithium ion battery, +2 sized summer tires
Reply With Quote
  #5  
Old 07-18-2011, 03:33 PM
TTOP350 TTOP350 is offline
Senior Chief
 
Join Date: Feb 2004
Location: IL
Posts: 385
Default

I know this is a old post but it cuda been the vac diaphram in the psi regulator. They pinhole sometimes and send raw fuel into the intake thru the vac line..
__________________
http://www.fquick.com/garages/viewga...ewimg&id=74990
"You people have stood in my way long enough. I'm going to clown college."
-Homer Simpson
Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -4. The time now is 06:40 AM.

Featured Vendors


Advertising Info