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1228079 CCC ECM modification to use for spark only?
Brother's car.....Looking to modify the 1228079 ECM to only control timing, knock functions, and TCC lockup...no fueling.
Pulled 305 and installed a 350ci. Got the ESC and knock sensor for a 350ci and pulled the Q-Jet off and replaced it with a Holley from the ZZ4 HO kit. I have the ZZ4 bin and a 8076.scr file(what is this???) and also found an 1228079.ecu file to use with TunerPro. Now what exactly do I need to modify in the ZZ4.bin to allow me to get rid of the MIL codes, have the TCC lock up correctly, control knock retard correctly, and have the computer advance the timing correctly?
Thanks....
__________________ Thrid Place Camaro Modified, Thirdgenfest '06
1989 Iroc-Z L98 with 68K original miles!!!
Mods: 411 PCM OBDII, 383ci ZZ4 short block, Comp Cams custom XFI cam, TrickFlow CNC Ported Heads, Holley Stealth Ram, Custom Cold Air Intake, Mufflex 4in exhaust
Brother's car.....Looking to modify the 1228079 ECM to only control timing, knock functions, and TCC lockup...no fueling.
Pulled 305 and installed a 350ci. Got the ESC and knock sensor for a 350ci and pulled the Q-Jet off and replaced it with a Holley from the ZZ4 HO kit. I have the ZZ4 bin and a 8076.scr file(what is this???) and also found an 1228079.ecu file to use with TunerPro. Now what exactly do I need to modify in the ZZ4.bin to allow me to get rid of the MIL codes, have the TCC lock up correctly, control knock retard correctly, and have the computer advance the timing correctly?
Thanks....
TCC needs TPS.
Might try feeding MAP into the TPS, and jack the numbers around but I wouldn't guarantee it working.
Not sure how I would use the MAP as TPS? Are you saying just jump the map and TPS wires together and mod the table somehow?
The TCC needs to some how see engine load.
The Holley doesn't have a TPS, so the only other way to see any sort of load, is via the MAP.
Yes.
Then play with what are normally TPS (voltage) values to some MAP (again voltage) input. At idle the TPS (v) might be ~.4v, while the MAP would be say 1.5v. So you're going to have to experiment with the values to get something workable (actually see if it possible). I've not done this, but I don't see how else to do it without fab'ing up a TPS for the Holley.
