Originally Posted by
30 RUM
Quick question for you guys, working on an 03 6sp manual for a friend. Truck has SB64mm charger, 90hp sticks, twin pumps, and studs, when working on a max effort tune I get a pop, and or cylinder miss in 3rd (some times 4th) gear around 2500 rpm. 5th and 6th gear pull fine. Fuel pressure is following along as it should, and the tune does not show that it is pulling fuel (mm3) or rail pressure. I have tuned countless 06-07's with EFILive and never had one do this. I have maxed almost every limiter, and it has not helped. The truck feels like is is hitting an air limiter, but we don't have any air tables for the 03's, and it's not pulling fuel?? Usually when you hit a limiter it shows in pulling fuel, but I'm not seeing it in any of the 20 or so logs. They look as if everything is fine. At the moment I'm running around 45-50% timing not deg around 2300rpm to 3400rpm @ 100mm3-140mm3 of fuel, do the 03-04 motors not like as much timing do to the different pistons? Any help would be greatly appreciated.
Thanks
Sam