This is my 1st time doing this

[debanjb]

I'm having a problem with my car cutting off. It's like the gas is just getting cut off. It cranks fine it just cuts off while driving or once I get out and get back in it's a gamble to see if it will start again. I've had the fuel filter, fuel pump, catalytic converter, mapping censor, alarm removed, new coil pack and a whole lot of other stuff I can't remember right now and it's still doing the same thing. I think every censor in the car has been changed. The diagnostic machine keeps saying it's the fuel pump. But it's pumping plenty of gas. I keep saying it's the fuel injectors but every machanic I take it to keeps telling me it's not because it's not missing what ever that means. Now I don't know if I doing this right or not but if this is not the right place for this message I apologize in advance. If it is PLEASE HELP. Single mom of 3 I can't aford a new car

[richtazz]

has anyone done a fuel pressure test to see what the fuel pressure is whe3n it won't start? Just because fuel sprays out the schrader valve, doesn't mean there is enough pressure there to fire the injectors properly.

[inafogg]

ok you have a grand prix???what year, miles, what engine?how long has prob. been there?what was the original problem before e1 started changing parts???
need more info to help

[debanjb]

Originally Posted by debanjb

I'm having a problem with my car cutting off. It's like the gas is just getting cut off. It cranks fine it just cuts off while driving or once I get out and get back in it's a gamble to see if it will start again. I've had the fuel filter, fuel pump, catalytic converter, mapping censor, alarm removed, new coil pack and a whole lot of other stuff I can't remember right now and it's still doing the same thing. I think every censor in the car has been changed. The diagnostic machine keeps saying it's the fuel pump. But it's pumping plenty of gas. I keep saying it's the fuel injectors but every machanic I take it to keeps telling me it's not because it's not missing what ever that means. Now I don't know if I doing this right or not but if this is not the right place for this message I apologize in advance. If it is PLEASE HELP. Single mom of 3 I can't aford a new car

The car is a 1989 2.8 liter grand prix SE. The problem started when the car started excelerating on it's own and I went through 2 red lights before close to 100 mph before it stopped. I had it towed to the garage the said the censor that tells the car to excelerate was bad so they replaced it and 3 other censors after taking it back 5-6 times. That problem is no longer there but then the cutting off started. Not as bad as it is now I thought the car was just cold but after a month or two it started cutting off more. took it back to the shop they said it just needed a tuneup and oil change and the air filter was dirty. got that changed. Still having the same problem. took it back they told me there was a wire grounding something out changed that. Then they told me they needed to drop the tank to change the censor in the gas tank once in there fuel fitler clogged and need new fuel pump. Ran for about 3 months started again. Took it to another shop machine states fuel pressure had car for 21/2 weeks changed fuel pump and filter because state was never changed I don't know if it was or wasn't anyway they state they changed it and it's still cutting off.

Pressure test was done yesterday and was stated there is plenty of pressure. This persons theory is the alarm which was removed wasnt taken out completely and is arming while I'm driving. replaced battery in remote and it's still having a problem

[inafogg]

sounds like a big guessing game with the shops.did ANY1 check M.A.S.i believe they used them in 89.its a big (hand size)plastic sensor.its mounted inline with the air intake hose.start the car & tap/hit it with rubber hammer,block/piece of wood.if the engine changes speed or stumbles sensor is bad. good luck & let us know

[richtazz]

Random dying is normally caused by three things in your type of car: a bad ECM, crank sensor or injector. When it dies you need to test for spark and injector pulse. No spark could be caused by a bad crank sensor or bad ECM. No injector pulse could be caused by a bad injector or ECM. The crank sensor tells the ECM when to fire the coils. The injectors used in your car, when they dead short, will cause a loss of injector pulse. You best bet is to have them ohm spec each injector and see if any are way out of spec from the rest. If yes, then replace the off injector. IF the injectors resistance is relatively equal, and you have no injector pulse, I'd say its a bad ECM.

[debanjb]

Originally Posted by debanjb

I'm having a problem with my car cutting off. It's like the gas is just getting cut off. It cranks fine it just cuts off while driving or once I get out and get back in it's a gamble to see if it will start again. I've had the fuel filter, fuel pump, catalytic converter, mapping censor, alarm removed, new coil pack and a whole lot of other stuff I can't remember right now and it's still doing the same thing. I think every censor in the car has been changed. The diagnostic machine keeps saying it's the fuel pump. But it's pumping plenty of gas. I keep saying it's the fuel injectors but every machanic I take it to keeps telling me it's not because it's not missing what ever that means. Now I don't know if I doing this right or not but if this is not the right place for this message I apologize in advance. If it is PLEASE HELP. Single mom of 3 I can't aford a new car

Thanks for the advice I do have a couple of questions the ECM is it related to the EGR @ all? the crancking censor has been changed. Also what is MAS?

[debanjb]

Originally Posted by debanjb

Thanks for the advice I do have a couple of questions the ECM is it related to the EGR @ all? the crancking censor has been changed. Also what is MAS?

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