i need help!

[jdmekcoupe26]

i did an obx intake manifold on my z6 and it was running really lean so i got a adjustable fuel pressure reg n turned the fuel pressure up a lil bit but its still runnin kinda shitty i have stock injectors and stock rail as well is there anything i could possibly do without having my ecu chipped to make it run better? lemme kno asap thanx ctv

[djkiley]

Gl

[H22SteakSauce]

How do you know it was running lean? You have a wide band ?

[jdmekcoupe26]

nah when i had the stock fpr on before i got the adjustable one i unplugged the vacuum hose to give it the couple extra lbs of fuel pressure n it ran a little better n while i was driving i would shift at 35 or 4000 rpms and my exhaust would back fire and after i did the adjustable fpr the backfiring stopped and it ran alot better but still i can tell its not up to full potential at idle while slowing down for a traffic light ill put the clutch in at when the rpms drop it ll almost stall out on me then at the last second it ll catch itself and bring the rpms back up to normal

[ct tibby]

its a vaccum leak the manifold is not seated right

[Ferio4Life]

i had the same problem but could never figure it out. Gl hope you can find the help

[H22SteakSauce]

Did you make sure there was no left over intake manifold gasket when you went to put the new one on. An intake manifold isn't gonna make that much of a difference in air flow ...My boy had a similar problem in his eg, his issue was an eBay 255 fuel pump...lol

[jdmekcoupe26]

Yea no vacuum leak and.no left over gasket I made sure I scraped it good