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Discussion Starter #1
Well I noticed the engine at idle has a fluctuating, but the RPM gauge is not bouncing around only the boost gauge is. The boost gauge fluctuates from 20 vac to 18 vac.

Any input on this?
 

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Discussion Starter #3
stowaway said:
wait, you have this, plus the possible bad fuel mileage?
:crying: yes!
 

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Discussion Starter #5
could the bad MPG be caused by a bad TPS?
 

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Discussion Starter #6 (Edited)
stowaway said:
it probably isn't the sensor, but the wires to the sensor. could also be the upstream o2 sensor.
where is the upstream o2 sensor located? is it the one screwed onto the downpipe?
 
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