ok, it's still having the problem!
here's what I've replaced:
1. spark plugs, using NGK BKR7es-11
2. MSD distributor cap/rotor button (have to b/c the external coil)
3. fuel filter
4. tried a friends set of knowingly good spark plug wires
5. tried a friends knowingly good ECU
We pulled the spark plugs a couple days ago and all were good except #3, it was lean. I pulled them today and they're all looking the same... lean.
I forgot to add that it's idling like a harley and backfiring at idle, will cruise smoothly at like 4000-5000 rpms. It will run smoothly when it's cold, enough power to still spin 2nd, but at soon as it hits 150 degrees, it's going to barely run
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