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1990 Pontiac Grand Prix throttle position sensor

Tiny
MADDAKBRA
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  • 1990 PONTIAC GRAND PRIX
Computer problem
1990 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic

what is the correct installation for a throttle positioning sensor? I installed mine but it didnt fix the problem and it should have so I think I installed it wrong!
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Friday, March 13th, 2009 AT 9:38 AM

5 Replies

Tiny
MMPRINCE4000
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You must disconnect battery when installing TPS.

The ECM stores a value (TPS voltage at closed throttle) and when installing new one, this value nust be cleared so ECM can "relearn" new value. Disconnecting battery will erase old value.
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Sunday, March 15th, 2009 AT 8:22 AM
Tiny
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How long do I need to have the battery disconnected to restore the value when changing the throttle positioning sensor?
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Monday, March 16th, 2009 AT 11:10 AM
Tiny
MMPRINCE4000
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I would disconnect 2-3 minutes to reset the value.

TPS sends voltage to ECM.3 to 5.0v. The closed throttle voltage value must be reset since you can never install a new TPS in the same EXACT position, reading the same EXACT voltage as old one, (unless you are very good or lucky :) )
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Wednesday, March 18th, 2009 AT 7:11 AM
Tiny
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Thank u! Your answer was very helpful my car is finally fixed yahoo! Thanks again
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Thursday, March 19th, 2009 AT 12:17 PM
Tiny
MMPRINCE4000
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Glad to hear it, thanks for using 2carpros.
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Friday, March 20th, 2009 AT 6:13 AM

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