91 350 idle while in gear problem

[KReePiN]

i had the same problem with my truck.......i replaced cap...rotor.....plugs...wires....iac...it wasnt until i changed the pcv valve that my idle finally went back to normal and sounded healthy

 

[CJ91C1500]

i replaced 02 sensor and pvc valve no change going to replace pick up coil and tps next i think i might have messed up i cleaned the iac with tb cleaner i read it help then i read some others and it said not to use anything so might have to get another one of those too

 

[KReePiN]

i used cleaner on mine also.....it didnt hurt anything......have you replaced your fuel filter?......i would check your base timing also

 

[Mean Green]

I use electronic safe throttle body cleaner on IAC valves, I've never had a problem using it!

 

[CJ91C1500]

havent done anything yet but cleaning up the cap and rotor that came on it they were bad, made it a lil better hopefully new cap,rotor,plugs,wires and fuel filter today.

 

[CJ91C1500]

little update changed the iac made a little better but not perfect its only doing it when its warmed up now sometimes the rpms stumble so much the oil pressure is 0 and the check gauges like come on its really pissing me off all i want to do is drive it i don't know what to replace next

 

[CJ91C1500]

changed tps no help..... im lost maybe ill check the timing

 

[KReePiN]

Yeah man....cause its not good running your motor with the oil pressure dropping that low.....you can smoke your motor real quick

 

[CJ91C1500]

yea i know its just starting to really piss me off i Googled my problem and i came across a couple people saying that my coolant temp sensor could be causing it ,any thoughts?

 

[KReePiN]

Yeah actually ......and all the ground wires that are bolted to your thermostat housing.....unbolt them and clean them with a piece of emery cloth and a wire brush.....clean all the connections real good....clean the bolt that they connect to also....one of mine were broken.....made my truck run like crap big time