Okay well as I said before I have a wierd low idle lope and a shuder well driving. I have checked almost all sensors. My question is there a way to seperate the electronics from engine (such as what it just takes to run spark fuel combustion.) of the truck (87 mj 4.0l 5spd.)? I know you can with other rigs but this jeep thing is killing me to understand like no check light and what not so there is no way to check the computer correct?