Engine surging
Dbanks12
04-02-2010, 06:10 PM
I have a 94 GMC truck, 5.7 litre with TBI throttle body. I replaced the fuel pump about two months ago along with a few sensors, oxygen, AIC control valve and map sensor.
Just recently it started surging when I am at cruising speed and when under load if you let off the gas it seems to not idle down smoothly. Only seems to surge from about 30 kmh to around 70 kmh when holding it steady at one speed. Could it be the regulator that is going, lots of power, idles smoothly in park and good at highway speeds. This one is dumb founding me, any help would be appreciated..
Just recently it started surging when I am at cruising speed and when under load if you let off the gas it seems to not idle down smoothly. Only seems to surge from about 30 kmh to around 70 kmh when holding it steady at one speed. Could it be the regulator that is going, lots of power, idles smoothly in park and good at highway speeds. This one is dumb founding me, any help would be appreciated..
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