Long story short, someone poured bleach in my gas tank. I didn't know know that it happened so i started the car and it died after about 20 seconds of running. Noticed my gas door was pried open, bleach all over the floor next to it, and the cap to the bleach bottle. I drained the tank, replaced the fuel filter, "upgraded" the injectors to 4 pintile mustang injectors with the same flow rate, replaced the fuel pump to a off brand walbro 255, put fresh gas in, and replaced the spark plugs. Starts but runs horrible. Only stays running with throttle input. Sounds like it's running on less than 4 cylinders. It's also backfiring from what seems to be right under the intake manifold, like an actual pop and flame, something i'v never seen before. I was guessing maybe the timing chain skipped a tooth and now the timing is off, resulting in a backfire, but i checked the compression and it's good and even for every cylinder. I'll take as much help as I can get, i'm very stumped. Thanks!
Stomp test shows code 1215.
Stomp test shows code 1215.
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