At the suggest of another mechanic, we did a compression test and learned cylinder #5 has....none. Or, 10 pounds anyway. Head gasket seems to be the issue. Thanks again.
Okay but can you give me an amount what you paid for rocker arm problem as we do have a misfire on one cylinder but also told EGR wiring problem, so we figure if its not the problem after we do this with our bogging and power and overheating than we would like to see how much more its gonna cost us! As we have already replaced so many other things thinking they would help, We too was told our head gasket. Praying its not. Thanks for your help!