I had been driving for 2 hours stopped truck. THe next morning the truck started fine and I drove about 1.5 miles and I felt the first hesitation and then another. I drove another miles and it started to get worse. When I take my foot off the gas the RPM would rev high and low and go dead.
I recently gave it a tune up. I changed the spark plugs, oil, air filter, fuel filter. The fuel pump was replaced about 6,000 miles ago.
I have checked the fuel pressure (it is 55lbs.), fuel injectors look good, timing is fine, EGR is fine, checked for vaccum leak, fuel pump, and rechecked spark plugs and fuel filter. I don't know what it could be...Can anyone think of anything else or ran into a similar problem before.
Thanks.