Treys_IROC

My car seems to be hitting a fuel cut. I put different pulleys on it for my supercharger and i am now hitting 9.5-10 psi. I have an FMU to regulate my fuel pressure, but my fuel seems to just cut off around 4500 rpms, i only run lean for the second that the fuel cut happens, otherwize im running rich all the way to the fuel cut,and then after the fuel cut

Any Ideas as to what could be causing the problem?

Thanks for any help,

Trey

GreenChevelleSS

very annoying too only happens when full boost and hard pull like in second and third gear...

GreenChevelleSS

wow lots of help here too bad the engines blown up now....

sleepybu

what pump you have and whats your fual pressure when boosting

jocool

I was having a fuel problem as well. I had stock intank pump with the ati inline and when I would reach the top of second gear (somewhere around 5200 rpms my fuel pressure would fall off (it would hit around 70 and then fall off). I installed a walbro intank and hot wire kit, and retained the inline pump. Problem solved, I guess the stock intank pump wasn't enough to feed my inline pump. Another thought is your FMU could be maxing out although your pressure should remain consistant(quit climbing but not drop off)if this was the problem. Just a few thoughts hope it helps.