Author Topic: Which Tuner? 99 Powerstroke  (Read 2593 times)

Offline MR5x5

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Re: Which Tuner? 99 Powerstroke
« Reply #15 on: November 12, 2021, 10:28:17 AM »
Damn, I'd have put money on the over boost. You sure the OB reg is working?? I think you can disconnect/plug the boost pressure line and run it that way.  I believe it it will default to a canned fueling table.
Have you tried disconnecting the turbo waste gate?  Disconnect the vacuum line - can run this way always without issue.
Check the oil pressure sensor at the front of the drivers side valve cover area, toward the inside.  Look to see if the connector is full of oil- which would be bad - seems like a stretch, but a flaky pressure sensor can cause weird things.

Offline Vek

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Re: Which Tuner? 99 Powerstroke
« Reply #16 on: December 29, 2021, 10:26:00 AM »
Oiled cotton like K&N is fine.  Your crank breather pukes oily misty blowby in immediately downstream of the filter, upstream of the turbo.  Don't sweat ingesting whatever oil is on the filter. 

The oiled filters can be problematic on MAF sensors on gas engines. 


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