Question about 2001 Chevrolet Blazer

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02 Jimmy w 4.3L vortex eng. Car starts but bogs down when trying to move. Seems to make a sucking noise. The oil pressure gauge also fluctuates alot with throttle position.fuel pressure went to 56-62 psi when running.

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  • ford99 Mar 28, 2009

    I have the same problem with my mother in-laws car. The pcv system has a vacuum line that goes from the left (ds) valve cover to the intake manifold. Where it meets the intake manifold there is a round piece (approx. 2" in diameter) that sits in the manifold. It is secured by pushing down and turning to lock in place. This piece pops out and breaks the locking clip. I assume a backfire pops it out. I'm trying to figure out why it's happening because this is the second time. It happens on start up both times. The car has always had a long crank time and I assume it's loading with fuel before it starts, causing a backfire. It's a dangerous condition because a major vacuum leak like this will cause the power brake booster to become inop.

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  • carhob May 11, 2010

    fuel pressure is good,sucking noise.....! unplugged vacum hose?is check engine light on?

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Sounds like you have a Vacum line off or one has a hole in it

Posted on Mar 14, 2009

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