Question about 1994 GMC Suburban
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.
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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