what is the cause of high idle combined with excessive crankcase pressure

1999 CHEVROLET SUBURBAN
225,000 MILES
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DIGIAL
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the truck is the wifes and has been very well maintained. when driving you dont have to touch the gas pedal and it wants to accelerate. when checking hoses for a vacuum leak i pulled the oil filler tube cap off and the pressure comming out of the crankcase was crazy. I'm thinking a broken piston ring but there are no noises or excessive oil consumption.
Mar 31, 2012 at 1:02 PM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
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Check for a bad PCV valve.
Mar 31, 2012 at 1:25 PM
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