Hey, I just recently bought a used ECU and after I installed it, my fuel cuts off at 6,500 RPM and my CEL is on. I did the key dance and I got the error code, 12-66-55. I found out that 12-55 are normal codes and 66 means that my TCM has been disconnected. The problem is, my car is a manual and only automatic cars have TCMs. That means the ECU I bought was from an automatic. Any idea what I could do to get rid of the fuel cut and the CEL? HELP!
#55986, "RE: ECU FUEL CUT!!" In response to Reply # 1
yep you bought the wrong ECU
and corbin I thought someone already tried and it gave all sorts of problems and the tranny wont shift (limp mode right away) I think there is no c2 bus for the ecu to communicate with the TCU so you get a CEL and limp mode
#55992, "RE: ECU FUEL CUT!!" In response to Reply # 2
Yeah, it won't shift.. but you'll be able to wind out second until 7200RPM
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'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#56014, "RE: ECU FUEL CUT!!" In response to Reply # 3
Hey guys, thanks for giving me a reality check. I was hoping I could do something about the AT ECU but I guess not. So I'm just gonna send my original ECU for repair and use the AT ECU temporarily. Thanks anyway.
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