Hello everyone, I have 2002 5.4l 4x4 that has some kind of misfire but my question is this. When I turn a key to the ignition position, there are several sounds to be heard. Dashboard lights go on, a fuel pump primes the engine, some relay clicks, some of dash control lights go off and finally, there is some vibrating sound about 1/2 sec at the end. Does anybody know what sound is that? I don't hear that anymore and I think that could be the problem why my truck is limping. Any advice is greatly appreciated. Thanks

 

Have you checked for codes?

 

Yes I did. No codes