Engine Performance problem
1996 Chevy Silverado V8 Two Wheel Drive Automatic 151000 miles
Ok, my problem is this. When I get my truck up to about forty mph and am cruising along, the motor starts to surge. It will jump from about 1500 RPMs to 1700 RPMs. I have changed out the speed sensor, the throttle positioning sensor, fuel filter, mass air flow sensor, ran injector cleaner through it. All plugs and wires have been changed as well as cap and rotor. So I am at a loss here. Someone told me it may be injectors going bad or maybe the fuel pump (which I did a pressure check on and was getting 50-55 psi). I was just wondering if you have any advice that might help?
Thank you for your time
Wednesday, September 2nd, 2009 AT 5:34 PM