It starts fine, if I stay with it, negotiate the gas pedal for a few seconds it wil usually keep idling smoothly. Until I put it into gear?
(1995 GMC Sierra 2500 Pickup, 305 V8, Automatic Transmission, rear wheel
drive, 85,000 miles) Once in gear it will normally require me lightly pumping
the gas to keep from dying. Too much gas and it bogs down and requires
additional gas pedal work. it doesnt want to pick up speed from a stop and
after I get it past the bogging down point I can floor it and it will sound like i
floored it but only accelerates at 50% of the speed it would normally. When it
shifts gears it drives fine until i come to a stop again. After 10 minutes, the
engine warms up and it isn't as bad. I have replaced the oxygen sensor,
spark plugs, fuel filter, air filter, fuel additives to clean any and everything and
I have run through 3 tanks of gas, it is still messed up. It gave me trouble
codes #13 & #44 I changed the Oxygen Sensor & cleared the codes. It gave
me trouble code #44 a few days later.