I've been trying to fix code P0300 multi misfires for over a year. I'll start with when the code started was after i had a tune up including a new distributor. The person who performed it didn't unhook the battery or any sensors prior to turning over ignition and therefore burnt up my ignition coil (replaced). Tune up was a complete failure and after replacing sensors; crank, cam, MAP and, MAF. In addition, I got a new fuel pump, fuel relay fuse, fuel filter x2, oxygen sensors bank 2 (x2 on upstream), new muffler and I just did a tune-up (plugs n wires). Not long after that I had to replace burnt up rotor plug/distributor cap and new distributor and I made sure its timed because i don't think it was timed correctly since the tune up that this prob started. So, here i am moving to the next resolve. Before i put a new fuel pressure regulator in. At this point I'm eager to do it on my own but I'd like to know if i can pinpoint what exact issue is by the details on my scanner. I would think scanner freeze frame details of when misfire occurs could help translate and pinpoint to a specific component. Any feedback is welcomed and thank you.
Jul 16, 2023 at 7:38 PM
