With a lot of MS user's help, we have figured out the issue. Some of us were using the stock ASD relay to switch on the MS main relay. Also, the ASD relay supplies power to the stock coilpack. When we run ignition with the MS, the stock ECU see's too many faults with everthing being disconnected from it, and will randomly reset itself, which quickly turns off and on, the ASD relay, which in turn, resets the MS, and cuts power(spark) from the coilpack for a brief second, causing the misfire/backfire/MS reset. The solution here is to switch on the main MS relay from the ignition switch's ignition wire, then use the MS's fuel pump relay output, to drive the stock fuel pump, and also send 12volts to the stock coilpack 12v feed wire. You want to wire the coilpack 12v to the fuel pump output, because that output switches off after a few seconds once the key is turned on, but not turned to crank. This keeps the power from the coilpack when doing code upgrades or just when keeping the key in the "run" position with the motor off. The fuel pump output on the MS can drive one relay, so i used that one relay to power up my fuel pump relay, and also send power to the coilpack..For this relay, it's best to grap constant 12v from the battery, fused of course.

The next issue to battle is the stock IAC valve, since it will surge rpm a bit when the MS is running both fuel and ignition. The stock ECU is freaking out, and opening/closing the IAC rapidly. We will have to figure out a fast idle control solution, and plug the IAC air bypass hole in the TB. Unplugging the IAC works good, but the main 2 problems with that is once in boost, the pressure can push in on the IAC pintle, and cause a higher idle. Also, you would have to keep your foot on the gas during cold warmup, to keep it idling.

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)