turbo ls vtec misfire

[luda30311]

hey I have a lsvtec turbo and was getting it tuned and on low boost it was fine. put in the race gas and started uping the boost and it would misfire only at high rpm. so I was stuck at 18psi couldn't go any higher because of this so I want to know what could be the issue. it has new plugs and wires on it so anybody can you please help and give me so things I need to check thanks.

[Munky]

gap of plugs? type of plug? what setup do you have? also are your injectors large enough to handle race gas which burns quicker?

[luda30311]

tuner gap the plugs to .25 and there ngk cold plugs. its a ls block with a gsr head stock cams 9.1 pistons and have precision 1000cc injectors

[Munky]

I bet you more than anything your running too rich or too lean under boost, what's air fuels look like at idle and under full boost?

[luda30311]

I bet you more than anything your running too rich or too lean under boost, what's air fuels look like at idle and under full boost?

not sure where the air fuel was but I know he said my fuel pressure regulator was not working right. so if its running to rich it can cause it to misfire? the tuner told me its misfiring at high rpm and it looses signal at the hondata. have you heard of anything like this I need a retune but need to fix the problem 1st thanks