1990 Pontiac Grand Prix throttle position sensor

1990 PONTIAC GRAND PRIX
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MADDAKBRA
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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!
Mar 13, 2009 at 9:38 AM
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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.
Mar 15, 2009 at 8:22 AM
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MADDAKBRA
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how long do i need to have the battery disconnected to restore the value when changing the throttle positioning sensor?
Mar 16, 2009 at 11:10 AM
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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 :) )
Mar 18, 2009 at 7:11 AM
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MADDAKBRA
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thank u! your answer was very helpful my car is finally fixed yahoo! thanks again
Mar 19, 2009 at 12:17 PM
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MMPRINCE4000
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Glad to hear it, thanks for using 2carpros.
Mar 20, 2009 at 6:13 AM
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