I OWN A 1990 PONTIAC FIREBIRD, 3.1L V6, AND THE CAR STARTS FINE, BUT ONCE I GIVE IT GAS, THE ENGINE SHUTS OFF. I REPLACED
FUEL FILTER
FUEL PUMP
TRANSMISSION
AND EXHAUST SYSTEM
ANYONE KNOW WHAT COULD BE WRONG? THANKS.
2006-12-20 05:28:34 · 7 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
Do you have a "check engine" light on? If so, you need to pull the codes by using a paper clip and forming a horse shoe of it. The ADL under the dash on the drivers side (where you hook up a scan tool) is where you need to plug this jumper. The top right 2 sockets needs to be jumped to do this. With the ignition switch off, plug the jumper (paper clip) into the top right 2 terminals. Now turn the ignition switch to the on position, but do not start the engine. Have a pencil and paper handy, and be ready to read the codes. It will flash a code by lighting up the check engine light on the dash. The way to read this is by counting the number of flashes. It goes like short flashes and long flashes. Example would be 1 long flash, followed by 2 short flashes, meaning a code 12, followed by a long pause, and on to the next code. Its important to count the long and short flashes seperate. Put the short ones in one line, and make a line beside it for the long flashes. Don't worry if you mess up, you can always turn the switch off, and then back on to start over. Once you get all the codes, you will be able to get back on here, and someone can tell you what the codes mean. When you are done, don't forget to remove the paper clip.
Off hand I would guess you have a bad fuel pressure regulator, or a throttle position sensor gone out. Look for a vacuum hose going to one of the sensors, and see if its split where it plugs on, or missing, collapsed, rotten, or just no good. If it starts fine, and when you give it the gas it stalls, you aren't getting enough fuel to compensate for the air you add when the throttle is opened. A bad throttle position sensor will not always set a code, but if it has a lot of miles on it, and has never been changed, that is probably the problem. The throttle position sensor tells the computer how much fuel to give the engine when you mash on the gas. You have a fuel pressure regulator that controls the fuel pressure, and it operates off manifold vacuum, so it too can be the problem. A mass airflow meter will do the exact same thing. It is located in the hose that is attached to the throttle body, and is pretty big. Get it running, use a medium screw driver, and hold it by the blade end. With the vehicle idling, use the handle part of the screw driver to rap on the mass airflow meter at about a medium rap, but not like you are trying to move it with a hammer. If the engine stops as soon as you hit it, the mass airflow meter is bad, and has to be replace. Try this even before you try to pull any codes, as this is more than likely the problem, and I have seen this many times before.
Keep me posted and I will try to walk you through to resolving the problem.
Glad I could help you. Good Luck!!!
2006-12-20 06:15:49 · answer #1 · answered by Anonymous · 0⤊ 0⤋
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2016-09-03 14:02:55 · answer #2 · answered by vandevanter 3 · 0⤊ 0⤋
I'm betting on the Mass Air Flow Sensor (MAF). It monitors the volume of air entering the engine and can cause poor running and stalling problems if it's bad.
2006-12-20 06:11:06 · answer #3 · answered by Somethingtotry 6 · 0⤊ 1⤋
WOW guessing is costing you a lot of money. Maybe now it would be cheaper to let a professional auto technician diagnose your vehicle and give you an estimate for the repair.
2006-12-20 06:32:05 · answer #4 · answered by Dave 3 · 1⤊ 1⤋
Go to www.ls1.com or www.ls2.com and check out the forums. LOT'S of techies over there, but be prepared for them to ask you for more info or to do more troubleshooting. Good luck!
2006-12-20 05:49:32 · answer #5 · answered by Paul P 3 · 0⤊ 1⤋
you should repent. get rid of the car and buy a motorcycle. cars are evil.
2006-12-20 05:37:55 · answer #6 · answered by j t 3 · 0⤊ 1⤋
have your catalytic converter checked if they didnt replace that, there is a way to check it
2006-12-20 05:43:41 · answer #7 · answered by vincent c 4 · 0⤊ 1⤋