idles good till full orp temp then surges if kick in neu it stops

Asked by Jul 03, 2016 at 09:47 AM about the Chevrolet C/K 2500

Question type: Maintenance & Repair

have replaced idle air control sen cleaned trotle body fuel pres good 62lbs &
up left w mech he couldn't find vac leak any idea ???

1 Answer

25,165

My mech friend saw this problem recently and suggested you look at the throttle position sensor (TPS), you may have a dead spot or spikes in it's range of motion. Another suggestion is to replace the EGR and not with an aftermarket one, go to the dealer for it. Lastly, surging can also be a sign of a bad fuel pump or sending unit.

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