runs better with tps sensor unplugged - LS1TECH - Camaro and Firebird Forum Discussion

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runs better with tps sensor unplugged

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Old 11-01-2007, 11:38 PM   #1
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Default runs better with tps sensor unplugged

I have been fighting a rough idle in closed loop and decided to disconnect the tps sensor to see how the car would act and it idle's smoother and the get up and go is much better. I got a new tps sensor and the car ran better for a while and then the idle issue came back. What happens is in closed loop only when coming to a stop at a light the idle will go down a little so the engine will idle rough. It will stay like this for maybe 5 secs and then rev back up and just idle a little rough. I unplugged the sensor again the problem went away and the power difference is up in a good way. Is there a special procedure on replacing this sensor? Do I have to test the voltage and adjust or what?
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Old 11-25-2007, 01:37 PM   #2
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There is a special procedure, yes.

I think you need a scantool so that you can move the tps back and forth to achieve a certain initial voltage reading. I haven't done a tps on an LS1, but I'm sure someone has access to this info.
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