Megasquirt - Assistance Needed, Very strange problem Options

[yarin]

I drove the car last thursday, ran fairly rough but had some power. Did some tuning, and had this very odd firing problem. I spent some more time today digging into this, here is what i found:

INJ1 bank hooked up to cyl 1 & 4
when either injector connector disconnected rpm goes up
when either spark plug removed no change

INJ2 bank hooked up to cyl 2 & 3
injector disconnect, seriousl drops rpm

Tried both combos. Alternating, 4 and simultaneous 2. reqfuel 9 / 4.5

So my conclusion is that all cylinders are getting spark, but only two are really firing. Furthermore a quick touch of the exhaust port shows that cyl 4 is running much cooler than cyl 3 after idling for a few minutes. I swapped the cyl 3 and 4 injector drivers and noticed an immediate change in head temp. It sounds like the cyl 1 & 4 are getting fuel, but not igniting. When those cylinders no longer receive fuel, the rpm goes up indicating no combustion, but resistance to compress the fuel.

Make any sense to anyone? I attached my .msq file. I double checked my setting, i made sure i'm only running off 1 table. I just took apart my MS box and can't find any obvious shorts, burns, etc. Keep in mind i'm only looking for this problem at 1000-1500rpm. It's not injector related, its driver related. (IMG:style_emoticons/default/sad.gif)

Anyone?

[DNHunt]

Yarin

Get someone to help you check spark. Make sure you have fire in each hole. I suspect you have spark but no fuel.

I believe there is an option in the fueling menus somewhere that lets you turn off 1 bank of injectors. Why they would have that I don't know. I got stuck on that once. If that's not the case start looking for problems with the hardware.

Dave