Chevrolet Repair: Chevy Malibu Cutting Off, chevy malibu, sensitive sensor

Question
My daughter has a 1999 Chevy Malibu LS 6 cyc. electric everything that has been giving us a fit...I have spent several hundred dollars on trying to have it fixed...The problem is she can be driving the car and it just quites most of the time by the time I get there it will start...Over the winter she no had problems, but when the weather gets hot it seem to come back, could it possibly be vapor locking? Desperate in Knoxville...

Answer
vapor lock is very doubtful. What you have is a temperature sensitive sensor or realy somewhere in the electronics.

You need to determine when the fault occurs, if you are losing ignition to the spark plugs, fuel from the fuel pump or ignition to the injectors before we can do any diagnostics.

Fuel pump test:

1. Get yourself a helper.

2. remove the gas cap.

3. have one person listen in the gas tank at the gas cap opening.

4. have the other person turn the ignition switch to the ON position ONLY so as the dash lights come on. Do NOT attempt to start the engine.

5. As soon as the ignition key is turned to the ON position, The person at the gas tank should hear the fuel pump run for TWO SECONDS and then it should STOP.

6. Does it ?.


If you do NOT hear it run, in most cases the fault is the fuel pump.



let me know.


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