Pontiac Firebird 1995 V-8 engine will die after 10 min running have changed fuel filter, fuel pump, altenator,

Question

battery is new - can this be in the ignition? Or when the heat builds up and then dies would be something different? My son has finally decided to ask for help and I am stump???

Answer 1

I work in a shop and we had something like this happen to a Mazda 626, what it was was a broken wire in the distributor, when it would heat up the wire would heat up and move ever so slightly, and the car would die, and when it cooled back down, the wire would move back to complete the circut, and the car could start again. I'm not saying that it would be that, but with cars now adays, there are to many electrical componants to deal with, take it to a garage and have them diagnose is, it could be mechanical, or electrical, and unless you have the proper tools and know what your doing your going to be stressing yourself out and spending a whole bunch of moeny that is uneeded to solve the problem.

Answer 2

Start here
Retrieve the codes from the PCM.
Go here for the procedure----->

http://autorepair.about.com/library/ts/obd-i/bl-dtcs-69a.htm

Scroll down below the definition chart for description of procedure.
Use the codes as a point of reference, and diagnose them from a "trouble tree" found in most repair or shop manuals.
You can purchase one at the book store or parts store for < $20.00
If the cost is too high, go to the local library and in the REFERENCE section, you will find one acceptable for your needs.
You might also ask them if they have a subscription to either ALLDATA or Mitchell On-Demand. These computer based references are very good stuff, professional level info.
If none of this is available or acceptable, go here for the same information, available for an annual subscription, right to your computer!

http://www.eautorepair.net/

When you do go after the codes, remember that the code is a pointer toward a system or circuit, not NECESSARILY a component.

Based on a bit of experience I would GUESS that the ignition module is failing. The PCM uses the module for both ignition and for timing fuel delivery at the injector drivers. But this is only a guess.
Save a lot of money and proceed with the diagnostics.
If you stand back and throw a bunch of parts at it, you will spend WWAAAYYYyy more money than necessary, and the diagnostic routine, though sometimes arduous will certainly be more satisfactory in the end.

Good Luck

Answer 3

Also try to read the computer diagnostic codes. You may have a sensor shutting down the engine! You could also have a relay that is running too hot (due to partially shorted windings), and it drops out when it gets heated up!

To check and see if ignition, crank the engine and put in a small "puff" of ether into air induction tube from air cleaner, or open system and put a couple tablespoons of gas into air induction tube after air filter (if inline air-filter used), - close system back up and try to start engine. Ether into a cranking engine, and gas in an engine to be cranked,-_ will give you a surge of power as engine burns the available fuel. -This will prove that the ignition system is still working!

Answer 4

Have him check the computer codes. Could well be a recorded clue there. If it is pretty consistent on the 10 minute window, it sounds more like an electronic shut down rather than just a thermal problem. There is a computer controlled card in the air intake that has been known for that kind of problem on birds as well as their Camero counterparts.