C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Help with new Throttle Position Sensor

Old Jul 1, 2010 | 07:40 PM
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94whitevettec4
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Default Help with new Throttle Position Sensor

Due to spontanious breakage I had to replace my throttle Position Sensor and like the instructions said it will have to be set, I was just hoping that it would not be the case and surprisingly enough I was not. It is not way off but is idling higher. Is there anyway to fix this without a scanner or a mechanics shop? Thanks alot for any help.
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Old Jul 1, 2010 | 07:54 PM
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All that you need is a volt meter
+ to dark blue and - to black
set it and forget it
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Old Jul 1, 2010 | 08:23 PM
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Thanks for the info i will pick one up tomorrow.
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Old Jul 1, 2010 | 09:17 PM
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Originally Posted by 94whitevettec4
is idling higher.
Maybe reset the IAC valve ?

http://www.corvetteactioncenter.com/...and+Idle+Speed

The TPS in your car is not adjustable like on the earlier cars.
The computer takes the voltage it sees ;key on and uses that as idle Volts so all you have to do is check is that voltage changes as the throttle is opened

Last edited by rodj; Jul 1, 2010 at 09:21 PM.
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Old Jul 1, 2010 | 10:26 PM
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Thanks I will try that out and i appreciate the step by step directions. I am not a pro mechanic just someone with common sense who trys to be self suffient with repairing my car so it really helps once i learn i know and can pass it on after all you cant take it with you. thanks again
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Old Jul 8, 2010 | 01:25 PM
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Originally Posted by rodj
Maybe reset the IAC valve ?

http://www.corvetteactioncenter.com/...and+Idle+Speed

The TPS in your car is not adjustable like on the earlier cars.
The computer takes the voltage it sees ;key on and uses that as idle Volts so all you have to do is check is that voltage changes as the throttle is opened
His IAC isn't adjustable either on a 94.

Both the TPS and IAC should "learn" the proper positions.
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Old Aug 7, 2010 | 07:59 AM
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My 96 FSM says sightly depress the accelerator pedal as you start the engine; when it starts release the pedal; let engine idle 5 seven seconds; shut down the engine for 10 seconds, then re-fire and check for proper idle.

The procedure is suppose to give a fresh, new IAC position that the PCM will learn and adjust to.

Jake
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