so i had my car out running today and i hit boost 2 3 gears and boosted fine when its cold then when the motor gets warm it sorta cuts out after 5000 rpm is it cause its running lean and i need to turn up the fuel its running at 45 psi and rasies to 50 or do i need new plugs do you think?

 

Lets hear a little more info about your setup

 

its tuned with a fmu 12:1 255 pump 265 mazda speed injectors

 

Got a boost gage? Wideband?

also if your running a 12:1 disc in ur fmu, im guessing its rising to a lot more than 50 like you said, do you have a gage on that or something? and the 255 pump could be making it even worse because it could be overpowering the regulators.. just my guess but i bet its going rich..

do you know how much boost you are running? what turbo setup?

 

no i have a afpr before the fmu and i think its a vaccum leak on one injector there are those little back grommets in the head thats cracked and its losing vaccum does anyone have any of the grommets?