2002 Pontiac Grand Prix throttle body

Tiny
TRIBEFAN38
  • MEMBER
  • 2002 PONTIAC GRAND PRIX
  • V8
  • FWD
  • AUTOMATIC
  • 70,000 MILES
My 2002 grand prix has been diagnosed with a bad throttle body, the main problem it has right now is it will not start, not even making a connection to turn over, to me this problem sounds more like it is in the starter or ignition. When you turn the key it does not even click. I have had problems with the gas pedal sticking once it is first started, but it has always been fine after that. Occasionally the problem of not making contact has happened before, but usually within a few minutes it starts and runs fine. Is it possible that the throttle body is causing this problem? - Did not match any documents.
Saturday, February 28th, 2009 AT 3:15 PM

9 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,750 POSTS
No its not possible the throttle body is causing this. When it wont start try leaving ignition key on and see if the theft light flashes continuously or if it goes out and get back to me
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Saturday, February 28th, 2009 AT 7:28 PM
Tiny
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Thank you for your response,

The anti theft light goes out
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Saturday, February 28th, 2009 AT 8:44 PM
Tiny
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There is no theft problem. I would check the starter motor for power on the purple wire when turning key to start, if there is power on it then the starter is no good. If no ppower on purple wire we can trace wiring
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Saturday, February 28th, 2009 AT 8:51 PM
Tiny
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Also, when on a recent trip we stopped at a roadside rest and expierienced inconsistent idling for a period of about 10 minutes, but it has been fine ever since. That it is the only time it has happened.

Was this related to the throttle body?
Was this a sign of things to come?

The dealer claims replacing the throttle body is a must, that will fix the problem of not being able to start it.
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Saturday, February 28th, 2009 AT 9:04 PM
Tiny
TRIBEFAN38
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I had the car towed to a my dealer because I thought it was under warranty (which is another story) and it is there now. I live 25 miles from there and have no other transportation. So I needed it fixed and that is what they told me.

Since I don't have access to it, we can't diagnose and follow the problem.

Do you think there is reason to stop them from replacing the throttle body?
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Saturday, February 28th, 2009 AT 9:12 PM
Tiny
HELPING YOU
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Hi, I'm very curious what thier explanation of a "no crank" caused by broken throttle body is!
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Saturday, February 28th, 2009 AT 9:34 PM
Tiny
MASTERTECHTIM
  • MECHANIC
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Icant in my wildest imagination think how replacing a throttle body can fix a no crank problem, possibly fix the idle surge problem but not the no crank problem
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Sunday, March 1st, 2009 AT 6:44 AM
Tiny
TRIBEFAN38
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Based on the info provided, would you say that the throttle body needs to be replaced?
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Sunday, March 1st, 2009 AT 3:29 PM
Tiny
MASTERTECHTIM
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Its quite possible the throttle body is binding or the bushings are worn out. I have replaced them before but not many.
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Sunday, March 1st, 2009 AT 5:01 PM

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