I'm having trouble with a spark knock and loss of power under hard acceleration. Seems to surge a little also. Idles fine and runs good during normal driving. Here's the mods in case you can't see my sig:
1.5 KB (6 psi)
IMRC deletes
42 lb injectors
255 lph fuel pump
NGK TR6 plugs gapped to .035
MSD coils
relocated IAT
custom tune using SCT chip
Dyno tune was done when I installed the blower in 2013. Haven't had any of this trouble until recently. Haven't tried to pull codes but no check engine light. I have replaced plugs and wires, but problem did not change. I have not tried coils yet but I don't have any spare to swap out. I suspect that may be the problem but I wanted to get everyone's opinion first before I buy another set. I haven't seen my air/fuel lean out on my gauge so I haven't suspected a fuel pressure problem. Any help you guys could give would be greatly appreciated.
1.5 KB (6 psi)
IMRC deletes
42 lb injectors
255 lph fuel pump
NGK TR6 plugs gapped to .035
MSD coils
relocated IAT
custom tune using SCT chip
Dyno tune was done when I installed the blower in 2013. Haven't had any of this trouble until recently. Haven't tried to pull codes but no check engine light. I have replaced plugs and wires, but problem did not change. I have not tried coils yet but I don't have any spare to swap out. I suspect that may be the problem but I wanted to get everyone's opinion first before I buy another set. I haven't seen my air/fuel lean out on my gauge so I haven't suspected a fuel pressure problem. Any help you guys could give would be greatly appreciated.