Bluebird Bus engine Surge at low RPM
Hello,
I am new to the forum and am seeking any input as to my engine surge with my 2000 Bluebird TCFE 2000 Cummings ISB 190hp. The bus has a nasty engine surge when it is at idle rpm and it is put into gear. The surge disappears as soon the rpm is increased and runs great. The surge has never caused the engine to stall out. My local mechanic has replaced ECM, fuel injection & lift pump (twice), new wiring harness, and remanufactured transmission. Multiple visits to Cummings Power South who only found and repaired a ground problem with the accelerator pedal.
Any inside would be greatly appreciated since this problem has stumped mechanics in a 150-mile radius.
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