Wining sound f250 sd 5.4 1999

Asked by Cnhntr1972 Jun 19, 2016 at 10:21 AM about the 1999 Ford F-250 Super Duty XL 4WD LB

Question type: Maintenance & Repair

Wining sound in truck. Sounds like powee
steering but is definately not. Was told to
change pcv valve any rhoughts

3 Answers
42,415

Auto_Centric answered 8 years ago

The PCV in the 5.4? made no change? Pitch of the whine increases with the rpms and eventually goes away. Regards

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290

Ricky answered 8 years ago

It's the hose that runs from pass. Side pcv to back of intake by firewall it's either cracked on rubber hoses or off

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290

Ricky answered 8 years ago

I am a 15 yr ford tech by the way Good luck

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