91 GMC Sierra running Rough
July 6th, 2013, 1:36 PM
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91 GMC Sierra running Rough
I have a 91 GMC Sierra 5.7L that surges when at idel and cuts out when acceleating with no power. It runs better when warmed up but not good. I have changed out the Plugs, Distributor Cap & Button, EGR valve, Map Sensor, coil and distributor modual. When I change out the EGR valve, I forgot the to plug in the map sensor to the carb and the surging stop. The reason I change out the map sensor, but I still have the same problem with the new map sensor.
Last edited by andy21us; July 6th, 2013 at 1:39 PM.
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