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TPS low voltage

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Old 04-27-2011, 07:27 PM
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smythge
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Default TPS low voltage
I'm having bad surging idle issue on my 94 Cobra. I have an adjustable TPS I was getting a .33v reading at closed throttle, at WOT I am getting a 2.50v I've adjusted it all the way and the most I can get is .58v and WOT 2.75v I am looking for a confirmation that this is a bad sensor, or is there something else I should be checking? Any help is appreciated.
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Old 04-28-2011, 12:22 AM
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nitrous_bob
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are you checking voltage with key on but engine not running ????
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Old 04-28-2011, 03:16 AM
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AdderMk2
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You need to check the VREF voltage and make sure you are getting a full 5v TO the tps. If you are... replace the sensor.
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Old 04-28-2011, 06:48 AM
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smythge
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Yes key on engine off and I checked the VREF voltage (brown wire) and it is 5 volts to the TPS
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Old 04-29-2011, 08:10 PM
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IRoman
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Originally Posted by AdderMk2
You need to check the VREF voltage and make sure you are getting a full 5v TO the tps. If you are... replace the sensor.
You do that when the car is running right? (Im having the same problem)
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Old 04-30-2011, 01:00 AM
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AdderMk2
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Originally Posted by smythge
Yes key on engine off and I checked the VREF voltage (brown wire) and it is 5 volts to the TPS
If you cant get full voltage across the range of the TPS, but have a good TPS VREF. You need to check its ground, and replace the sensor.

Originally Posted by IRoman
You do that when the car is running right? (Im having the same problem)
no. KOEO, not KOER
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