I have a 2010 F150, and I have a Random misfire, it throws a P300 code, P304,P302, and other random misfire codes I'll clear the codes and the truck will run ok then a few weeks later the trucks start running bad again. I've done a few test, and few other things, I replace the COP, and plugs, cleaned the MAF, and the Throttle Body, then tested the fuel injectors electronics, checked out good. I did a fuel pressure test and the fuel pressure went to 58psi, I turn the truck off, the pressure dropped to 48psi, then dropped to 42 after about 10 minutes then after about 30 minutes was at zero. I have no visible leaks does that mean I have fuel injector stuck open? It does smell like its running rich.


Any help would be good..