Misfire after working on the car.
09-12-2018, 08:54 PM
#1
Launching!
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Misfire after working on the car. Changed plugs and wires over the weekend and the car was running fine. Made a 50 or so mile drive, shut off the car and let it sit for a while. When I got back in the car an hour or so later it was misfiring bad under load. Like if I put the pedal to the floor it would miss bad about 2k to 3k rpm. It's like it has a 2 step lol. When driving an you put the pedal to the floor it just misfires and pops and backfires. Put another set of plugs and wires on it today and the same thing. The plugs I pulled out that were only a week old were all black. Only thing I can think of is maybe I jostled something while working on the car maybe. A ground or something?. Cant seem to think of anything. Thoughts? Car is full bolt ons and cam car with a T56.
09-13-2018, 10:02 AM
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Launching!
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No codes believe it or not. But I'm pretty sure I found the problem. The wire loom that goes from the ECU down to the starter, crank sensor....got burned through. The one that had the heat resistant tape or whatever that is on it. It must have been laying on a header tube. The wires look to be ok (i haven't pulled the harness out yet. Just from what I can see with the flashlight) but I'm sure they're not. I have to go through that section of the loom and see. I'm sure the crank sensor wires got damaged.
