DIY PROMDo It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.
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It is a viable option. There is a hac of it around that has semi-commented code along with all of the calibration parameters. The important I/O will all match up (O2, EST, MAP, CTS/IAT) as they are hardware dependent. For the DIS to distributor only need to change the initial timing and the min/max timing parameters.
yes the 3.1 was DIS ignition, but ECM still used the same TACH input and same EST output for timing control, should work.
Be sure to flip the max retard, max advance, and reference angles around to what ever the values were in the .bin that was used in the 730 memcal. Yes, the signals are all the same, but the code runs differently between DIS, and Distributors.
I like the 730 ECM better for high-z applications. It is usually cheaper and easier to find. The $58 code is just about a drop in replacement for the $8D code.