MSD E-Curve

7dswinger said

So got a coil today and installed it. Didn't help oddly enough, ran worse actually and the same symptoms were there. So I switched back the Blaster SS and it ran better but didn't help.
What else can cause back firing though the manifold and sputtering? I can understand a too lean or too rich condition but I've played with the AF ratios but that hasn't helped.

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If you drove it with the back firing and sputtering, I wonder if you could have knocked out the power valve (if it's a Holley).

When you out a timing light on it, does the timing move around, go on and off, and act sporadic? Mine was wierd right on the timing light.

Surprised the oil filled coil didn't work.

Contact MSD engineering on Monday. I don't think the Blaster SS coil could knock out the E-curve electronics, but I'd ask them.