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When i start getting into boost (approximately between 3-6psi), I notice a significant drop in power and what feels like a misfire. No misfires are being logged and the problem just started recently. I have not changed the setup or tune on the truck it just appeared after hitting 10 psi. I performed a calflash of the same tune and the problem is still here. Performed a boost leak test and found no leaks. Any ideas?Attachment 22309Attachment 22310
2001 Silverado 4.8l
Twin 60mm t3/t4 turbos
TH400 transmission
Drive by wire
No MAF/ running speed density 2 bar map sensor(AC Delco 213-1631)
No cats
No EGR
No EVAP
No Secondary Air
Delphi 12613412 injectors (50lb @ 4 bar)
fuel system is a stock return type fuel system
static frp with no reference is 56 psi
What plugs and gap
Ngk 4177 @ .030”
TR6. Spark blowing out? Look at some br7ef for higher boost.
I’ll give that a shot. And replace the plug wires with better ones.
Update, replaced the plugs and found the problem.
Plug wires only have about 100 miles on them. Gonna have to reroute.
Attachment 22321