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1994 GMC 5.7 L Hesitation Problems

My truck is having some hesitation problems coming off of idle. It is also spitting and sputtering just as I let off the throttle as well. I have put new plugs, cap, rotor, and have ran a can of sea foam in the gas tank. It does not seem to have a noticible vaccuum leak. My gas milage has gone down around 11-13 MPG in the last year.

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  • Steven Salvetti Jan 04, 2009

    Thank You, My problem was the EGR valve! I had first assumed that I had a vaccuum leak, but could not visually see anything wrong. I pulled the old EGR valve off and it was just plugged with carbon buildup. The old valve opened, but with alot of force. The truck is running great now!

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The problem is most likely the EGR Valve. to test this disconnect the vacuum line to the EGR Valve and block it with a screw or golf tee, if the hesitation goes away replace the EGR Valve.

Posted on Dec 24, 2008

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