Hey everyone, new to this so bare with me please. I have a 1997 two door tahoe 4X4 with the 5.7l vortec 350. True dual straight pipes, no cats, glass packs. My problem only happens when the engine gets warm, since its so loud and I often get off work at 6am, i try to be as quite as possible driving through my neighborhood so light acceleration is key, and thats where it happens, sputters seems to be missing and burps out the exhaust, not loud but burps. Also sputturs and seems to miss under medium accel 2500-3000 rpm right before it shifts. Sometimes it will not shift into the last gear in od and runs around 2200 rpms going around 70 mph, sometimes it does this, others it does fine. I have changed plugs, wires, dis cap, rotor cap, tps, fuel fiter. It was throwing cat conv, o2 sensor, misfire #3, and a few other before i changed all those. I reset the brain and service light stayed off for a few days and it ran a little better but service light came back on and problem seems to be getting worse. I will be taking it to be read tomorrow evening to see if the same codes are still present. It runs like a scalded dog when running above 3000 rpms and shifts perfect. The higher rpms the better. Any help would be greatly appreciated. I have read several threads but none have my exact symptoms, Like others here have said, I'M AT MY WITS END......PLEASE HELP

 

Check your fuel pump pressure.

 

Ok thank you, I will do that tomorrow, would that cause the sputter only once the engine is warm? It runs great cold.

 

It starts fine and idles perfect, is sputters at around 1500-2000 rpms in any gear. And in park just reving the engine. Also around 3500-4500 rpms in park it burps randomly.

 

Sounds like the spider injectors to me....not enough fuel or fuel pump slowing down.

 

Did you ever get this fixed mine is doing the same thingr same truck 5.7 vortec