Tweet
Idling problem - and code 39
I've transplanted a '95 3.4 DOHC into my 5-speed '88 Fiero GT. Used a '91 ECM from an automatic tranny car (9396) and had a chip burned by Darth Fiero. It just will not idle properly. I've checked for vacuum leaks and all sensors have been replaced with known-good units.
It idles between 1250 and 1500 and seems to be running rich. It doesn't surge or search. If I coast down a hill in neutral or with the clutch in, it will idle steadily at 1250 to 1500. If I roll to a stop with the clutch in it will idle steadily at 1250 to 1500, until I reach a dead stop. Then it will usually drop to 850. But as soon as I start moving the idle is back to 1250 to 1500.
After a long drive, with several stop lights, the check engine light will come on when I am stopped and put in the clutch. The code is 39. No other codes. I checked the codes for VIN-X, 91-93 and the description is:
"Transaxle clutch switch has failed 4 consecutive times. Vehilcle was at normal operating temperature and the speed went from 0 to 40 MPH or more and back to 0 again."
Anyone have any ideas? Is it possible that the chip has not been reprogrammed for the manual transmission? What exactly is this transaxle clutch switch?
Thanks!
It idles between 1250 and 1500 and seems to be running rich. It doesn't surge or search. If I coast down a hill in neutral or with the clutch in, it will idle steadily at 1250 to 1500. If I roll to a stop with the clutch in it will idle steadily at 1250 to 1500, until I reach a dead stop. Then it will usually drop to 850. But as soon as I start moving the idle is back to 1250 to 1500.
After a long drive, with several stop lights, the check engine light will come on when I am stopped and put in the clutch. The code is 39. No other codes. I checked the codes for VIN-X, 91-93 and the description is:
"Transaxle clutch switch has failed 4 consecutive times. Vehilcle was at normal operating temperature and the speed went from 0 to 40 MPH or more and back to 0 again."
Anyone have any ideas? Is it possible that the chip has not been reprogrammed for the manual transmission? What exactly is this transaxle clutch switch?
Thanks!