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93 SC400 supercharged

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i was driving my car for about an hour down the expressway. Started running really rough about a mile from my destination. I managed to limp it to where I had to go. Now it barely starts and won’t respond to throttle barely, sometimes if I catch it at half throttle it will rev up smooth. I have a 92 I’ve been using for parts. I’ve changed ecu, cam sensors, crank sensors, all relays, and re-timed the belt. The car is lowered and did rub through harness on lf , but I fixed wires properly and relocated. If I move the harness it doesn’t change. I’m e mechanic and I can’t figure this out. I checked spark, test light didn’t light up but it got me, it’s getting spark. Any help would be greatly appreciated.

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