The ole girl was having some rough idle problems, ie. hunt and surge idle, checked the board and everyone recommended cleaning the TB. To my shock, when I took off the air hose and inspected the TB for the first time since purchasing the car 2+ years ago and found what looked like to me old tobacco deposits. The TB was coated air side and intake side with this brown smudge gunk. I took it apart, cleaned it with injector cleaner soaked in a rag, being careful not to pour any near the throttle switch. Also cleaned the intake hose from the AMM to the TB. New gasket, torqued the nuts, and we were set. Car started fine, idle was just a bit high which was different than previously when the car would just barely idle above a stall.

Now, the car starts immediately, but the idle is about 1000rpm or higher (no tac to verify). Thats not all...after driving where I have to drive faster than 40mph and coming to a stop, the rpms are much higher, I would guess about 1300-1500 steady. I read elsewhere on this board, that cleaning the TB was not the problem, but instead was masking another problem. I have checked all the vacuum hoses, none appear to be cracked or damaged. The IAC works (at least when I disconnect the hose, the car stalls), the TB switch properly clicks, the kickdown cable is fine (the throttle pulley isn't tense causing the idle).

What next? I yearn for the good ole cars that I could actually find a throttle adjustment screw, but this 2.4 jettronic doesn't have one. My wallet is actually missing the old low idle. At least then a tank of gas lasted me a couple of days longer.

Matt
1990 240 DL
Unknown miles (and don't care, it runs)