Nelson Tune.... Round2

[casey23]

Well had a chance to check my fuel pressure at the rail. Idle it sits around 58-60psi when im driving around its 60-63psi. So im stumped besides the O2 sensors I have no clue lol.

again what is the exact problem?.. what are the mods to the truck??.. Your throwing drivers side o2 sensor codes?...

[GMCtrk]

Uhh...of course it's not the tune. You said in the other thread it sounded like something rattling around in the engine. It sounds like you have a hole in one of your pistons or a valve bouncing around in there.

[GenIII_4Ever]

Uhh...of course it's not the tune. You said in the other thread it sounded like something rattling around in the engine. It sounds like you have a hole in one of your pistons or a valve bouncing around in there.

Truck runs better now swaped out the burnt plugs. And took it on a 450mile round trip last week. Ran pretty good but still is a little weaker than normal on the low end.

[farmtruc]

...but still is a little weaker than normal on the low end.

Probably because your truck doesn't have the supercharger on there anymore.