King6746

I have tested my egr valve and map sensors they both tested good I pulled my o2 sensor and it is testing bad so I ordered a tps and o2 sensor and also found they my knock sensor is broke

What is a best way to test the egr valve

Classy Comanche I will give it a try some more research shows it could be the egr valve also but I wanted a second opinion before I spent $100 on a new one

I have recently purchased a 88 Comanche with a blown head gaskets I replaced the gasket installed new lifters and replaced majority of the vacuum lines it cranks up just fine maybe a slight high idle and when I drive it it does fine until I slightly let off the gas then it starts jumping real bad and runs rough I can't just Cruze on it you have to be to the floor or let off completely for it to run fine any idea would be greatly appreciated!