Greetings, I have about 81,000 miles or about 135,000 km. And keep it nice and maintained.
Last fall i had problems , ZJ would not idle when cold, i replaced the IAC and we were back in business. I spayed a can of TB cleaner into the TB as well and threw in a can of injector cleaner in the tank. It never idled smoother.
Its been running great until this week. Developed the no cold idle again. Its wants to idle at about 250-300 instead of its normally robust 500 rpm, it seems to surge and fall from 225 to just under 500.
It runs fine at speed on the freeway.
I pulled the IAC , its was spotless, gave it a wipe. Even shot some TB cleaner into the IAC port and wiped it out. I stuck my finger into the IAC port with a rag as far as I could go and rotated it to clean. Is it possible I broke something in the TB when I did that? I kind of doubt it cuz thats what i did last fall and everything was fine afterward.
Replaced the TPS , if anything it seemed to idle even lower. ( It was not a mopar TPS )
Today, just trying the easy stuff replaced the crankshaft position sensor, still runs bad -- this was more a preventative step ( i.e hoping ).
I disconnected the TPS while its was idling and all it did was throw a code (24- low/high tps voltage ), the motor had no reaction, other than to keep chugging away. i did plug the tps back in and the code is still there but i figure it will clear in 4 or 5 starts.
I have not gotten any codes ( other than the self -inflicted 24 ) Could I have gotten bad TPS sensor? Could the IAC be bad? Kind of doubt it.
All I got left on the TB to replace is the MAP sensor and that puppy is about 150 clams. I could throw more injector cleaner in the tank, but i feel that's not the root problem. Should i pull the TB?
Any pointers appreciated-- oh ya Is it possible to install a TPS wrong? Im not ready to take it to the garage just yet.
Thanks, James