CAn anyone direct me to a thread on converting or adapting an IAT sensor to the 7747 ecm and the mods necassary in the bin?? THanks
Supreme Member
90C350
Sorry to break your spirit but 7747 does not support IAT (or MAT) functionality. You can switch to a car version, without any harness modifications, of C3 ECM such as 8746 or 16136965 used in later B-bodies which have IAT input at C-12.
//RF
Sorry to break your spirit but 7747 does not support IAT (or MAT) functionality. You can switch to a car version, without any harness modifications, of C3 ECM such as 8746 or 16136965 used in later B-bodies which have IAT input at C-12.
//RF
Senior Member
Quote:
Sorry to break your spirit but 7747 does not support IAT (or MAT) functionality. You can switch to a car version, without any harness modifications, of C3 ECM such as 8746 or 16136965 used in later B-bodies which have IAT input at C-12.
//RF
yes it does, Fast305 has IAT working on a 7747 pcm...Originally Posted by RFmaster
90C350Sorry to break your spirit but 7747 does not support IAT (or MAT) functionality. You can switch to a car version, without any harness modifications, of C3 ECM such as 8746 or 16136965 used in later B-bodies which have IAT input at C-12.
//RF
Quote:
Originally Posted by Fast305
The CPI 4.3 and the Export L31 TBI trucks both ran MAT sensors with the 7427 PCM. For my TBI engine, I simply copied over the CPI 4.3 tables into the TBI .bin calibration and tweaked from there. 
Member
i think fast305 has it working with a 7427 which is what you have tbi-max with your 95. the 7427 can run iat. but the tbi trucks with v-8's didnt use it between 87-95 from the factory.
Senior Member
Quote:
thanks for that bit of info.. sweet.... im going to run the wire atleast to the pcm, then just buy the sensor and the harness to plug into the sensor.. strange on the 87-95 trucks...Originally Posted by getsideways
i think fast305 has it working with a 7427 which is what you have tbi-max with your 95. the 7427 can run iat. but the tbi trucks with v-8's didnt use it between 87-95 from the factory. Ok then thanks guys!! I guess i will just have convert to the 7427 or EBL I guess.