Throttle Position Sensor - Pontiac GTO Forum
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post #1 of 14 (permalink) Old 10-03-2008, 04:23 PM Thread Starter
 
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Throttle Position Sensor

Alright guys another question.
How do you know if your throttle position sensor is going out.
It is located in the throttle body, right.
If yes is it the top one or the bottom one cause there is two sensors there.
Thanks guys.
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post #2 of 14 (permalink) Old 10-03-2008, 05:20 PM
 
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Bottom or middle of the throttle body. You would throw a CEL if it went bad because thats how the car knows how much fuel to give it. The top one is the IAC valve.
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post #3 of 14 (permalink) Old 10-03-2008, 05:43 PM Thread Starter
 
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Well its that my rpm are very low when the car is on idle its at less than 1000 rpms more like 500rpms (its not on the 1 if thats the way you say it, its like at the second line on the rpms?) could that be the problem the throttle position sensor. Also whats a CEL?
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post #4 of 14 (permalink) Old 10-03-2008, 06:09 PM
 
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I thought stock was at around 500 to 525. at cold start up its around 750
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post #5 of 14 (permalink) Old 10-03-2008, 07:26 PM Thread Starter
 
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The thing is its not stock and another thing is if i dont let warm up good it keeps on shutting off like it stalls or something.
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post #6 of 14 (permalink) Old 10-04-2008, 07:08 AM
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Quote:
Originally Posted by alsgto04 View Post
Also whats a CEL?
CEL = Check Engine Light
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post #7 of 14 (permalink) Old 10-04-2008, 01:57 PM Thread Starter
 
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Oh CEL i get it but the thing is there no light on so why is my rpms so low then or is that normal?
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post #8 of 14 (permalink) Old 10-04-2008, 02:07 PM
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As long as it doesn't die or stall when you stop or snap off the throttle it sould be just fine.
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post #9 of 14 (permalink) Old 10-04-2008, 02:10 PM Thread Starter
 
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Well it does die out if i dont let it heat up good is that normal or what could it be.
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post #10 of 14 (permalink) Old 10-04-2008, 02:16 PM
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If it dies when cold then I would use a scan tool and see what the computer sees with the temp sensor and where it thinks the IAC motor is when it dies.
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