I'm in a bad way guys. I tried everything I could think of so I took it to the shop....they can't figure it out either. The truck starts, but has no power, backfires, sputters, then eventualy dies. The only thing we can find is it throws a code 42 which is Electronic Control mod....If I remember correctly. You can clear it, but it comes back immediately. I have changed all the electrical: wires, plugs, distributor, coil, etc. and tried many different timing setting. The shop has changed all questionable sensors, wires and even the computer...NO LUCK. Any ideas guys? Anyone ran into this? Please help! PS. 1995 chevy K2500 with built 454, hypertech chip, many mods, but it was done 6 years ago and ran great...uptil now.