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Oil in Throttle Position Sensor


DTakas

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I have a ’96 Olds Cutlass Supreme with a 3.1 V6. Recently the check engine light came on so I stopped at Autozone and they told me it was the TPS. I unplugged the connector and it was full of oil. I took the TPS off and there was oil in it too. I cleaned it out as best as I could but I can’t figure out how I’m getting oil up there to begin with. I can’t see any oil in the throttle body. Since I cleaned it up it’s running better now (was idling at 2000-2500 RPMs). I’m just wondering if this is indicative of a larger problem.

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How long has it been since you changed your PCV valve? that would be my guess. A little oil coming through the TB is absolutley normal, but not necessarily filling it up. (btw, it's a 3100, not a 3.1)

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IMO you might as well replace it, it's not very expensive.

 

Yeah, that's true. They are maybe $3 at a parts store.

 

And since its a 3x00, is also the easiest 60* PCV to replace...

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