I couldnt think up a witty thread title so here we are. This is a new problem that I dont really know where to start. Truck is a 99 silverado with a 2002 avy 411 pcm running a 3bar OS on a forged 402 with a 2.3L whipple with 127 FIC injectors. It has been tuned for years and runs great, but this issue showed up last week. It died after the burnout at the track, but I was able to restart it fine. Made my run (testing new setup so not WOT yet) but after I let off when I was coasting down the engine completely died. I couldnt restart it so I had to get towed back to my trailer and I loaded up for the night with the winch.
Next day I go to mess with it and replace all the plugs although they didnt look bad. Start right up, backed off the trailer, then I made it 100 yards down the street and when I let off the throttle to coast to a stop sign it died again also. I tried for 10 minutes to get it to start, using the gas pedal to the floor for flood clear in case it was too rich, and even used my methanol kit test button (100% meth) as a semi starting fluid which has worked for me before. Nothing. Engine spins over fine just never fires.
It almost feels like both fuel and spark are being cut (or not activated), but I dont know what would do that. My only 2 clues are I dont have an RPM signal when cranking and it doesnt start, and the cluster immediatley shows "2" on the gear selection regardless of where the shift lever is.
I have checked all wiring and nothing appears burned or frayed. Replaced crank sensor but havent tried the new one yet and I have my doubts thatll fix it. NSS and both connectors to it are very nice, all wire connections are soldered.
I attached a couple logs, the first one is when it died at the track, and the other one the next day when it died and failed to restart. Anyone have any ideas? Thanks
e8 run 5 died.hpl 19-07-21 16-53-51.hpl