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Originally Posted by 94SubieSVX
The engine stumbling I was thinking might be the TPS sensor? I haven't really tried to find that out though. And I know the fuel filter is on right, and is the right one(I got it from the dealer). Its not trowing any codes when I pull them, and the CE light isn't on at all. What exactly is acetone and what does it do?
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Acetone is the active ingredient in nail polish remover. As crazy said it's pretty harsh stuff. I've been told up to 3oz is safe per 10 gal of gas, so I figured 4oz was a safe amount for our 16 gal tank.
To test your TPS you can check the voltage on the signal wire (I believe it's the white one) with an autometer. The correct reading is around .97-1 if I remember, but a search should turn up more info. The ECU reconfigures itself for the TPS reading though, so I'm not sure if that would have a big effect.
P.S. Missed the post with the 2000+ reading, that is insane!