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air noise, what could it be?
I have a 97 F450 dump. I just picked it up from the muffler man. He took the cat off and ran a straight pipe from the downpipe back. Now when my rpms go up and stay at a constant level, I have this weird air whistle noise. It kinda sounds like an air compressor blowing off air. It never did...- dmaxdog
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- Replies: 6
- Forum: 94-97 PowerStroke Engine, Drivetrain & Chassis
