1995 Yukon High Idle

[Steven94]

My 1995 Yukon is having a high idle issue and I've already replaced the EGR valve, EGR Solenoid, TPS and its still having issues any help is appreciated.

 

[B-train]

Check the gasket under the TBI unit. They are known to crack and disintegrate with age. This will cause a huge air leak and allow it to run faster. Thise didn't use MAF sensors, so the engine doesn't know it's getting more air than I realizes.