I have a 1988 F350 4x4 with a 5.8l 351W. Anytime I drive the truck I have a hesitation on light acceleration but not when I put the pedal down. I ran the test for trouble codes and it tells me I am running rich (which I can smell). The check engine light comes on after about 20 minutes of steady driving or 10 minutes of stop and go. I have replaced several parts within my EGR system (EGR valve, EVP sensor, EGR vacuum solenoid) with no help. I thought that I placed the vacuum lines on the EGR vacuum solenoid backwards so I swapped them and all it did was make the truck idle lower. I have no vacuum leaks and my hoses are good. I am stumped with this and I want to know if anyone has had a similar problem. Any help would be appreciated.
JPF snipped-for-privacy@earthlink.net