Hey everyone, Read and searched, but I still cannot find a solid solution or an idea to what my problem is. I have a 2003 6.0L bone stock its a 6 speed. Picked the truck up last week. So far it has been pretty good.. Head gaskets are good, EGR system seems to be working fine. It has started in...

my 1996 ford f250 7.3 psd has 320000 miles on it and somtimes when I press the pedal it goes dead, when I press it the check engine light comes on, when I let off it goes out. Sometimes the O/D off light will flash. I have already replaced the intier pedal. I also have a dp tuner f5 power chip...