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rpmdiag, Tech and Instructor
Category: Pontiac
Satisfied Customers: 8151
Experience:  Since 1975
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I have a 2002 Pontiac Grand Prix 3.1 L. Recently it has

Customer Question

I have a 2002 Pontiac Grand Prix 3.1 L. Recently it has taken about 5 minutes of cranking for it to start. Also I got a code P0171 that came up around the same time this started happening
JA: Will the headlights turn on? Is the battery fully charged?
Customer: Yes and yes
JA: What is the make/model of your car?
Customer: 2002 Pontiac Grand Prix 3.1
JA: Are you fixing your Grand Prix yourself? What have you tried so far?
Customer: My father has been trying to remove what he thinks is a sensor in the back of the engine. Whatever it is it's hard to get to without removing the engine
JA: Anything else you want the mechanic to know before I connect you?
Customer: It is located directly under the freeze plug in the back on the motor
Submitted: 11 months ago.
Category: Pontiac
Expert:  rpmdiag replied 11 months ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 11 months ago.

Check the fuel pressure with a gauge first, then check for large vacuum leaks in the bank 1 area. You can also have a vacuum leak on the lower intake gasket on that side that you can only find with a smoke machine.

Thanks, Ron

Expert:  rpmdiag replied 11 months ago.

If you are satisfied with my answer, I would greatly appreciate a 5
star rating now and I will still assist you after you have rated me
too if another question pops up. I don’t get credit for helping you
until you rate me.
Thanks again, Ron