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06 OBW 2.5, 05 Forester, had 03 H6 OBW
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5,967 Posts
It may help to erase the old learned mappings by disconnecting the battery for awhile.

I replaced my TPS back at 80K? 120K? something like that.
 

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Registered
06 OBW 2.5, 05 Forester, had 03 H6 OBW
Joined
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5,967 Posts
Probably a few minutes would do it if the dome was turned on first.

I have had mine 5 years? 4? not sure. Bought with 55k on it, over 193k now.
 

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Registered
06 OBW 2.5, 05 Forester, had 03 H6 OBW
Joined
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5,967 Posts
I have seen it fix odd problems after replacing my TPS.
Anything that was a bit out of spec can cause the car to adapt to the error, then when you replace the part it seems the computer gets flummoxed and you just need to wipe all the learning.
 

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Registered
06 OBW 2.5, 05 Forester, had 03 H6 OBW
Joined
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5,967 Posts
My PCV was gummed up by 75k miles, don't recall it ran better after cleaning it.

Come to think of it, I did have a slight idle issue a while after changing the TPS, I cleaned the clump of grounds on the rt side of the engine, where all the sensors on the engine ground, and it fixed it.
 

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Registered
06 OBW 2.5, 05 Forester, had 03 H6 OBW
Joined
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5,967 Posts
I would not spray clean any part of any engine.

I removed the bolt holding the ground wires and cleaned where they mount and all the leads with a wire brush.

The corrosion was very slight, but some of those sensors deal in millivolts...
 
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