Hello there friends, I have read a LOT of posts here on the kind of the same issues I am having. I have a code 24 (IAT) and my car has been running rich and the idle is erratic to the point it will jump from about 1100 down to 500 and try and die.. when it finally warms up, it will die.. so I try removing the engine coolant temp sensor, still runs the same. I remove the ISC and it idles higher and wont die. the pintle is making sounds on shutoff. So I return to the AFM.. I pull the afm and the idle goes perfect to 700 (I am JDM 7mge) and now I have a code 24, and I think 31 (AFM), would you think that the AFM would also cuase running rich? I am hoping replacement of AFM will fix both.? am I barking up the wrong tree?
code 24, rich and erratic idle.
- Thread starter suprabones
- Start date
You set the 31 when you unplugged it with the car running, more than likely. I would check the connections first, and make sure that all the pins in the harness are seated correctly, and there's no corrosion on them or the afm.
Start here: http://cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=FI&P=94
If you have a GTE, skip ahead a few pages to the gte tests
Start here: http://cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=FI&P=94
If you have a GTE, skip ahead a few pages to the gte tests
well I need to bump this, cause I am still having problems :3d_frown: I ran a new THA wire and cleared up code 24, my code 31 is gone when I plug the AFM back in and reset all codes.. HOWEVER! the car will idle fine until it gets to temp, the idle gets really erratic and will die sometimes.. if I remove the AFM it will idle perfect at 700 (7mge) but no codes are being thrown. Before I change the AFM, has anyone else heard of something like this.. I know its possible for the coolant temp sensor to mess with the idle, or the 02 sensor.. but a AFM w/ no codes? hmm :icon_evil
Just making sure but are you checking for Codes with the diagnostics jumped or are you just checking for the light to appear? Check your ISC to make sure that it is working properly (give it power and ground out the 4 other pins one at a time as shown in the TSRM).
Yes, I checked codes per TSRM, set the jumpers. I have a new update. I ran all new wiring to the AFM and still the same problem.. I guess the only thing left to do is buy a new AFM?? the idle clears up soon as I pull the plug on it...