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Originally Posted by AtomicLabMonkey
Programming your engine yourself is very time-consuming and difficult, but it is certainly possible if you're willing to learn. I've taken my Mustang from pinging like crazy on 91 octane to running smoothly on 87 octane in the space of a couple of months, using a tuning device with no documentation whatsoever.  |
Did you properly match your boost, timing, fuel and load maps? What about open-loop to close-loop transitioning? Cold start? A/C? Idle? Learning correction? Timing advance multiplier? How are your partial-throttle full-boost EGT's, or did you get the waste-gate duty cycle properly matched? How about the duty cycle for larger injectors? Where'd you install the wide-band O2? How about the AVCS variable timing? Did you make sure to set the parameters for the stock EGT sensors to prevent inefficient cat CELs? Will the car pass an OBD-II smog check, is the ECU check-sum corrected? And did you do it all right the second time for the secondary map?
...not to knock the work you've done, but tuning a 5.0L EFI Mustang motor is slightly less complicated than tuning a Turbo Subaru motor. In fact... I question why I'm bothering w/ this WRX thing anyway... a Chevy 350 in a Porsche 914 would be faster, and much easier and cheaper to work on.
