: EGR symptoms

TN Torando
02-12-09, 09:26 PM
What are the symtoms of a sticking egr, car is surging a little new coils could possibly be a fouled plug, fuel injector, egr and suggestions.

02-12-09, 10:14 PM
A stuck open EGR will stall the engine at idle.

02-13-09, 10:22 AM
Another symptom of a sticky EGR valve is a brief, minor ignition "rattle" on part-throttle acceleration or a low pitched ignition ping during moderate part-throttle such as going up a slight grade. And, as Ranger said, a partly open EGR will trash the idle characteristics.

It is entirely possible that a surge could be present also, as when EGR operates it dilutes the incoming air (oxygen) charge in order to control combustion temperatures: excess exhaust gas from a fluttering EGR would upset the fuel/air mixture.