MartinZ28
Newbie
I own a 1997 chevy 1500 with a 5.7 i have had this issue for a month now. The truck starts up fine and drives around fine in parking lots, when i get on to a mine road it hesitates and has no power. When i do give more gas it backfires a few times and i let off. When i smash the gas it hesitates and backfires it goes but it burbles the whole time i’m going full throttle. I usually do all the work myself, i installed longtube headers around 4 years ago now and left the egr tube cut hanging around the engine block. I honestly don’t think that is the issue as well as not having o2 sensors. recently changed fuel filter, fuel pump, spark plugs and wires, cap, rotor and egr .all with in a years time frame. I’ve taken it to a mechanic, one refused to look further in because no o2 sensors, another shop said everything looked fine. If any one has any ideas please let me know.