99k2500crew
Newbie
I have a 99 K2500 crew cab with 7.4. Recently it starting displaying idle problems. When its cold, and in open loop, idle is fine about 900rpm.
When is goes to closed loop the idle drops when driving and coming to a stop. Its automatic. Tranny place scanned it and said there were no issues with the Torque Converter.
No codes. I've replaced: fuel pump, fuel pressure regulator, fuel injectors, both upstream O2 sensors, TPS, Idle Air Motor, EGR, PCV valve and tubes. Fuel pressure checks at 50ish.
Small miss is noticeable at idle but does not feel like a plug is not firing.
Hoping someone has some suggestions on what to check.
Thanks.
When is goes to closed loop the idle drops when driving and coming to a stop. Its automatic. Tranny place scanned it and said there were no issues with the Torque Converter.
No codes. I've replaced: fuel pump, fuel pressure regulator, fuel injectors, both upstream O2 sensors, TPS, Idle Air Motor, EGR, PCV valve and tubes. Fuel pressure checks at 50ish.
Small miss is noticeable at idle but does not feel like a plug is not firing.
Hoping someone has some suggestions on what to check.
Thanks.
