3.0L Megasquirt w/ EDIS: Headers running at different temps?

[jangell]

Today's update: Still doesn't work.

I tried rotating the coils (rotating through ACB to BAC to CBA), and it still won't start. This was just to confirm I really do have my coils set up correctly, although all I really know is that nothing starts. I didn't try other combinations like ABC, CAB or BCA.

I also tried just having pairs of coils installed (the "A" coils, the "B" coils, etc), just to see if it would run on two cylinders, and then again with four coils, but none of that had any effect. The only remotely positive thing is that with only two or four coils it didn't seem to backfire. It even ran smoothly enough at one point (with four coils) that I thought it was going to start, but it never actually caught. As you'd expect, there was a strong fuel smell out the exhaust when you have most of the coils out of the car, but at least I know some of the injectors are working.

I was hoping I could narrow down which cylinders are firing and which are backfiring, but I couldn't get it to backfire with pairs of cylinders installed, and it just seemed to crank and never actually fire a cylinder... I think.

And that's really all I did today -- shuffled some coils. I did enough cranks that the battery drained fairly quickly.

I've attached a cranking log with all the coils in place. The points where the RPMs drop to zero is where the engine backfires. I notice there's still noise in the CLT and MAT sensors (under 0.5 degrees, it seems), which is annoying, since the whole point of changing the harness routing (before which the engine actual ran) was to get rid of the noise.

-- Joe

edit: Oh, and I tried a spare EDIS module for good measure, but that didn't matter either.

2018-08-19_11.09.26.msl