SYO237
SyTy Registry
doing some diacom runs few nights ago with ian flying co-pilot running the laptop...
did some initial runs, saw very good lines as far as boost levels and low knock degrees for having intake temps of around 100 degrees...
went for one last hurrah after adjusting the bleeder for the external WG to get a solid 17.5psi....
spooled up and left hard..... everything was fine, truck came up on boost quick...
upon hitting 17.7 psi on the gauge, the truck completely cutoff while i was still WOT... it was as if the truck was turned off...
i quickly took my foot off the gas and everything was normal...no check engine light, had boost, everything was fine...
upon going back and looking at what went wrong in the diacom file...
injector pulse was good, RPM was good, knock was seeing around 3.8 up until i took my foot off the gas and everything dropped off...
now, when the truck cutoff, NOT WHEN I TOOK MY FOOT OFF THE GAS, you can see on the file everything was running fine... there was an injector pulse and boost.....you can see where i took my foot off, i get a big spike of 8 degrees of knock... possibly phantom knock of the motor settling back down on the mounts, throttle blades snapping shut, etc etc....
the only other occurance of this was the night we installed the WG and playing with boost, i got a cutoff at around 20psi... but shrugged it off as i hit the boost/rev limiter on the chip and the truck shutdown...
what could be causing this sort of cutoff at WOT?
im running a BG Chip... basically a T116 setting off the ultimate...
no egr, no boost flag, no speedo, ic pump runs constantly, 17.5 psi....
all i could come up with is that a plug is being blown out under boost and im dropping a cylinder?
again, truck runs fine after cutoff..... giong out again tomrrow night on diacom to do a few more runs....
ideas?
did some initial runs, saw very good lines as far as boost levels and low knock degrees for having intake temps of around 100 degrees...
went for one last hurrah after adjusting the bleeder for the external WG to get a solid 17.5psi....
spooled up and left hard..... everything was fine, truck came up on boost quick...
upon hitting 17.7 psi on the gauge, the truck completely cutoff while i was still WOT... it was as if the truck was turned off...
i quickly took my foot off the gas and everything was normal...no check engine light, had boost, everything was fine...
upon going back and looking at what went wrong in the diacom file...
injector pulse was good, RPM was good, knock was seeing around 3.8 up until i took my foot off the gas and everything dropped off...
now, when the truck cutoff, NOT WHEN I TOOK MY FOOT OFF THE GAS, you can see on the file everything was running fine... there was an injector pulse and boost.....you can see where i took my foot off, i get a big spike of 8 degrees of knock... possibly phantom knock of the motor settling back down on the mounts, throttle blades snapping shut, etc etc....
the only other occurance of this was the night we installed the WG and playing with boost, i got a cutoff at around 20psi... but shrugged it off as i hit the boost/rev limiter on the chip and the truck shutdown...
what could be causing this sort of cutoff at WOT?
im running a BG Chip... basically a T116 setting off the ultimate...
no egr, no boost flag, no speedo, ic pump runs constantly, 17.5 psi....
all i could come up with is that a plug is being blown out under boost and im dropping a cylinder?
again, truck runs fine after cutoff..... giong out again tomrrow night on diacom to do a few more runs....
ideas?
