1998 Cadillac Deville vacumn

Tiny
GRAMPS2
  • MEMBER
  • 1998 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 148,000 MILES
My engine has began to make a loud wine after it runs for a while. When this happens the engine starts missing. In cold weather it runs good untill it warms up. I took it to be checked and passed all computer functions. I have been told it is a vacumn. Where do I look and how do I find what is making the noise.
Friday, December 11th, 2009 AT 9:12 PM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
Look for split hoses around the intake. There is also a backpressure relief valve on the intake, behind where the P.S. Pump is. SPray it with something when you hear the noise, and see if it changes.
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Friday, December 11th, 2009 AT 11:28 PM

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