Discussion Starter · #1 ·
Hello, I have been here before for help, but this time I come with something completely different. About a month ago, I was doing maintenance of my truck (i.e., Brake lines and such). I have replaced the fuel filter (hadn't been replaced in a long time), spark plugs, spark wires, vacuum lines from the top of the block, and I have cleaned the fuel tank as well because it had bad fuel in it. There was no rust found in the tank. I have no idea at this point why it is still misfiring. I have eliminated the possibility of it being the ignition coils because all of the cylinders have amazing spark. I am wondering if the fuel injectors are the reason for this. What else could I check? I am not super knowledgeable about how to read a basic obd reader. I have read the codes and only one shows is a PO303. I erased the codes and just letting it idle for a bit turned the code back on. What can I do?