My buick keeps cutting off. Everything has been checked out. What's wrong?

Question:
Buick 1991 Regal. Crank sensor replaced, alternator ok, Wires replaced Considering Exorcism. It runs for awhile then it just cuts off.

Answers:

what would happen?

The Facts:
It is either the fuel pump or the ignition module
If you can start it with starting fluid after it has died and wont restart, then it is the fuel pump.
If not then it is the ignition module.
The module lives under the coil pack just under the front valve cover (where all the plug wires go)
By the way, there is also an ignition fuse on the passenger side under the hood in the fuse and relay holder thingy. Make sure that is good and clean.
This is assuming you have the 3.0 engine with D.I.S (distributerless Ignition System)
Module is about 51$ at Autozone

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3) Does EVERYTING die (lights, radio, etc..) or just the motor.

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5) Is the car in motion, sitting still or doesn't matter

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6) Also, have you checked your keyswitch?

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over to you ........................

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Sounds like you might need to get a new johnson rod.

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Find a new mechanic. Your current mechanic is just throwing parts at it, hoping to stumble on the cause. You are paying the price. You bought a crank sensor and an alternator that you didn't need.

gas mileage conservatively?


I suggest bringing it to a GM dealership. You will pay a little more, but their mechanics specialize in GM products and have all of the required diagnostic tools. They will be more likely to get it right the first time.

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For what you paid for the alternator and crank sensor that you didn't need, would have paid the extra to take it to the dealer.

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Seems to me the electric fuel pump is going weak. But then that is just another guess.

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If the dealerships checks the fuel pump pressure with the car running right.. they may not know the fuel pump is crapping up.

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The fuel pump pressure needs to be analysed when the car will not start.

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your mechanic is ripping you off giving you parts you don't need look not enough gas is getting to the engine, so the engine is cutting off. have the fuel pump checked.
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