Quote:
Originally Posted by XfireZ51
Actually it has been tried by Haibeck and myself. Any ECM can be used w any year car. The prom however needs to be for the correct year.
N.B. the 90 prom does not have an on-board knock sensor, so although any year ECM will work for a 90, the prom will need to be specific to the 90. It is possible to remove the Knock Filter circuit from a 91-95 prom however.
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I just yesturday asked
Marc.....regarding
Marc's Chips Calibration
AYBKG version #4 for '90 LT5's and Calibration
BFXBG version #2 for '91 LT5's.
Are these two chips you create interchangeable at all? In other words can one put the BFXBG version #2 chip in the 90' Z?
Or the AYBKG version #4 chip in the 91'Z?
Marc responded.....
They are not interchangeable and if you did interchange them there would be a check engine error for no power key wiring with BFXBG in a '90. There would also be a knock sensor check engine code. The full power mode would not be available with AYBKG in a '91. Also, the knock sensor would not work.