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TPS Sensor

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Old Apr 14, 2007 | 08:37 AM
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From: Brenham
Default TPS Sensor

I have a 99 camaro with typical bolt ons and a cam. On the street the car works fine 99.99% of the time. The two times I took it to the track on the launch the car will flag the tps sensor and then the car nose dives down. I have put three tps sensor's in, did the tps reset, check the volts, check the range of the tps, everything is always perfect. Every now and then, like 2 or 3 times in the last 2 months it will flag the tps when you start the car. The weirdest thing is how it will work on the street, but at the track it wont. I am open for any idea's.
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Old Apr 14, 2007 | 10:13 AM
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Probably moving more air than is expected for the position the throttle is in. Only time I've had reduced power at startup is when I forgot to plug in the TPS, kind of suggests a wiring problem. My bet is on 1514 in Y bodies, don't know the related code for F bodies.
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Old Apr 14, 2007 | 11:28 AM
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What is the voltage at 100% TPS?
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Old Apr 14, 2007 | 11:58 AM
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Originally Posted by Blacker
What is the voltage at 100% TPS?
I don't remeber, I had one of my friends check it with his snap on scan tool. He does it for a living and races camaro's, he said it was exactly where it should be. I know he checked it at idle, wot and with the car off, and running and checked the full range of the tps.
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Old Apr 14, 2007 | 12:31 PM
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If the TPS voltage was high, that would be the DTC. What DTC are you getting with the TPS fails?
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Old Apr 14, 2007 | 07:10 PM
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P0121... I think I have a short in the harness. I shook the wires yesterday when the scan tool was hooked up to see if the voltage would change but it never did. Since then the car has not messed up again.
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Old Apr 14, 2007 | 07:47 PM
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I just got a cam, and I am getting 0121. My voltage is 0.78 at 0% tps, whats wrong with this thing ?
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