Engine Performance problem
2000 Pontiac Firebird 6 cyl Two Wheel Drive Automatic 40072 miles
I purchased my Firebird one month ago. Since then, the car has died on me 6 times. Each time the car has been idling (either while in " park" or " drive" at a stoplight). The car shakes, surges, and dies. My oil guage and battery guage needles go back and forth during the shaking and surging. About half of the time it starts right back up. The other half it takes 3-4 attempts before it will stay started. It has been hooked up to diagnostics twice. The first time (after dying 3 times) the computer registered a trouble code for high voltage on MAP. The technician reset the car's computer. I took it back after dying again and no trouble codes registered.
I phoned the previous owner and he stated that it was doing the same thing to him. He said it might go for 2-3 months before dying. He stated that he took it to the dealership 3 times and it never registered a trouble code.
The car stalled out when I was driving approximately 30 mph. No warning other than losing acceleration. This is the first time it has stalled while in motion.
Going back to mechanic. I'm thinking what if a trouble code doesn't register, as has happened previously with this car. Any ideas?
Once again no trouble codes registered. Additionally, it stalled 3 more times (once while driving) since the 02/28/2008 update. Please help.
Replaced MAP sensor and crank sensor. Still surges and stalls out, but only when gas tank is less than half full. When I fill the tank up, it runs fine until I get it down to under a half tank. Could it be fuel pump/relay? I'm ready to give up. Any ideas?
Ok when stalling recently did it start right back up? Does it only do it when engine is hot? Im going to look for bulletins and ill be right back.
March, 1, 2008 AT 2:38 PM
I did find a bulletin for a faulty throttle position sensor causing drivability problems with no codes stored in memory because it happens too fast for computer to pick up.
March, 1, 2008 AT 2:40 PM
Recently it would start up but would shake, surge, and stall out. Usually takes 2-3 cycles of this before it starts and stays running.
March, 1, 2008 AT 2:54 PM
Disconnect egr valve and drive, see if symptom goes away.
March, 1, 2008 AT 5:55 PM
For how long can I drive the car with the EGR valve disconnected? Sometimes it's 2-3 days between incidences, though they seem to be occurring more frequently.
March, 6, 2008 AT 9:54 PM
I'm not one of the techs here, but thought I'd speak about my experience. One of the things I've noticed with my TA is if the air intake is not sealed properly (ie loose clamps) it will act like you described with spits sputters and dieing at idle and while easy driving. If your still having these problems you might want to check all the clamps around the air intake ducts.
Other area that may cause this is timing being off or even bad gas. Try using high grade of gas with gas cleaner and see if that helps.
May, 24, 2010 AT 6:12 PM
Yeah you just described my problem to the letter, I have an 02 with 44k v6 and it does the exact same thing.I replaced my map sensor to and it still does it. Today it stalled, then surged (almost hitting the car in front of me), I filled it with premium(for the first time) and its behaving for the moment. If I can find the cure i'll let ya know. If you find it, please let me know. Keep your tank full and a good distance from cars/people at stop lights, keep that foot on the brake. Btw- does yours stall even more after driving 30min on a hot day?