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accelaration surging


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Posted

another issue.i replaced the fuel filter and air filter.before my blazer wouldnt start cause the fuel line was clogged or something. it runs now but it surges while im driving. fuel pump maybe?

Posted

could be the sensor is carboned up on the intake throttle body. could try opening it and spraying off the sensor and the throttle body area with carb cleaner. worked for me.

Posted

sorry, didnt see the response. when under heavy throttle I would get like backfires and like surges the the truck didnt want to go, turns out the intake valve was really carboned up and dirty, so I just used carb cleaner and a rag and cleaned it up nice, also, find the air map sensor (should be around the intake valve throttle body area, undo it, spray the sensor off with carb cleaner, but dont wipe the end of it or anything. just spray any crap off of it. reinstall, and see if that helps.

Posted

also, if that doesnt work, you could have many other issues like you stated fuel pump, or old plugs, I would just give it a good tune up with spark plugs, wires, air cleaner etc.

Posted

Could be your egr valve.If it didnt have enough FP i think it would do it at all times.Throw a light on the balancer with the vacuum advance disconnected see what its at.

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