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The crankcase ventilation tube is plugged, pinched or it has been eliminated.

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Q: What could cause vacuum in valvecovers?
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Related questions

What cause an engine to idle high?

A vacuum leak could cause that.


What could cause your car to idol high and run rough?

A vacuum leak can cause that.


Will a vacuum leak cause the check engine light to come on?

It could.It could.


Would a egr valve make your 1994 Pontiac grand am delay on its acceleration?

yes,if the inner vacuum bladder is cracked it could cause a vacuum leak,this could cause a problem at idle also.


What could cause engine to idle irregular?

A vacuum leak is one possibility.


What would cause the vent system to only blow out the defroster?

could be a vacuum line off


94 325i BMW loud roaring noise when acceleratingLike a vacuum noise?

The cause could be your muffler. Mine has a hole in it and when I accelerate it roars, kind of like a vacuum.


Why does a car idle too low?

A car can idle too low because there is a leak in the vacuum. Cracks or breaks on the vacuum hoses in the cars engine could be the cause of this.


What would cause your 2000 ford windstar to idle hgh at str and stall when coming to a stp after driving?

A serious vacuum leak could cause that.


What would cause 93 S10 blazer rpms rise when put in drive from park?

A vacuum leak could cause that. Check the gasket under the throttle body for a vacuum leak. It was common for that gasket to crack apart with age.


Have a OUTBACK 2000and wants to stall after warming up what could cause this?

Engine temperature sensor? Vacuum leak?


Where is the glow plug relay on 1999 ford 7.3 diesel?

the glow plugs are located under the valvecovers should be 8 of them