I have had a slight hesitation kind of like cam overlap on the dirty motor. My current set up is an 059 ecu and afm with the 02 sensor. I unplugged the sensor and it ran the same. Funny thing is, the 2.8 motor ran the same way. Is it the fuel pump? Any ideas? This only happens low rpm and when I am on the gas it runs fine.
TIA,
RP