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Throttle Position Sensor Bad?

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Old 11-09-2010, 12:32 AM
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Throttle Position Sensor Bad?
With autotap I am seeing 18% at idle and 93% wot. Do you think the TPS is bad? Autotap says it should be close to 0% at idle and 100% wot?
 
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Old 11-09-2010, 02:33 AM
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It is a 5 volt signal, so 18% of 5v=.9v which is within range, as is 93% or 4.65v. If the value was zero would the engine start at all?? Dunno.
The pcm checks the voltage from the tps on start up and uses the returned value to operate.
 
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Old 11-09-2010, 11:40 AM
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Is the truck running well and getting expected gas mileage?
 
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Old 11-09-2010, 11:59 AM
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When those go bad or flaky, you'll usually know it. Trans tables get goofy. The PCM is good about picking up a TPS fault as well.
 
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