i have every thing that is on my sig. Its hard to explain. Im not sure wat is going on with it. It just feels like it just flat lines towards teh end of the rpms. my car feels like its in nuetral when it does it. it weird. I was thinking it was something to do with my coil pack or wires .. or maybe even my plugs. i have had my car for about a year and haveent changes the plugs. and i have raced a good amount
ok first thinks to check....plug gap.....i would prob take your plugs down to about 40 with 17#...........second thing.....make sure nothing is vibrating to make and vibrations in the motor and make knock.......thirdly.....make sure you dont have a boost leak anywhere.....that might be a prob
17-18 is max on the stock fuel system.....i have seen plenty of cars that have fmic...tbe...3" intake...18# wastegate....and hard pipes put them right at the 12 mark for afr's....stage 1 would be alittle safer running those boost levels....there will be white on the tips but there should be black up the plug
these are good mods but i cant see a 05 spiking 17 and holding 14-15 fuel cutting.....i would say possibly the k&N sucking closed or boost leak PM me if you need help with a leak test. also overboost fuel cut seems to like to hit around 4000rpms
that fact that hes been running this setup for awhile makes me think its not fuel cut...
i've been running 18 spike 15hold with no clamp for the past month on my 05..my guess is still on the plugs and wires