Triscuit

Hi im having a problem with my Jackson Racing SC for a B16A2. When the car is on the boost gauge shows -10 instead of -20 vaccum. Is their a hose switched or do I have a vaccum leak? When I try to go into boost it studders and wants to die. I have an upgraded walbro 255 fuel pump, 450 dsm blue tops, and running uberdata. Please point me into the right direction of the problem. Thanks in advance.

Triscuit

I'm wondering if I have all the connectors installed?

RacerXI

Did you just install the blower/injectors/uberdata? Or did it run ok before the uberdata install?

Triscuit

It ran good before but uberdata was always running. I think i might have either connectors switched or a vacumm leak. Maybe my belts are to tight thats why its at -10 vac instead of -20 at idle.

toolowsol

belts wont matter. You have a vacuum tube off or some sort of a check valuve or one way valve on backwards is my guess.

Triscuit

so my vaccum lines could be on wrong?

Triscuit

bump for help!

Triscuit

could a vaccum leak have the vaccum to -10 instead of -20 at idle?

Triscuit

will a messed up throttle body gasket give me a vaccum leak that raises my negetive vaccum to -10 instead of -20 at idle......please someone help a noob out. I've searched already

Triscuit

this is a help bump!

Triscuit

would a new throttle body gasket cancel my vaccum leak?

supercharged98

could be if it was bad or on upside down. i had a bad vacuum leak and replaced the throttle body gasket and that fixed everything. check to make sure you have a check valve on your brake booster and your vacuum lines all hooked up, and all bolts tightened connecting supercharger, goose neck, and so on. and as far as having vacuum lines switched, as long as all your vacuum lines are connect to a port, it doesnt matter which one you have them hooked up to.

The-LS

tell us again what you have in your car when it ran fine, and then what you changed before the problem come up. Sounds like a vac leak

Triscuit

I had a b16a2 with everything else thats on right now except the new 450 dsm injectors. I took off the throttle body to reach somethingso when i was taking it off i could have porbably wripped the gasket.

The-LS

well if you think you have a damaged gasket check that first. I'm assuming you've been running Uberdata fine without problems before this. If you just put in new 450 DSM inj. what inj were you running before and did you change your Uberdata map to run with the new 450cc inj under boost? You can also have a vacuum leak around the new DSM injector(s), check that out while you are doing the TB gasket.

Triscuit

wow never knew you could have a vaccum leak around the injectors yea I scaled the map for 450 inectors in unberdata I just need a day off to see if it is the tb gasket thanks for you help.

The-LS

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ronin EG6 &raquo;</TD></TR><TR><TD CLASS="quote">wow never knew you could have a vaccum leak around the injectors</TD></TR></TABLE>

yea you can, its just like any part that bolts to the manifold... it needs good seal. My buddy had a leak around his inj before because he had the wrong inj. and the gasket/grommet wasn't big enough to seal.

prestonpark

was the 450 inj tuned
and should be ar 20 at idle

make sure u tigten the blower to the manafold tite

Triscuit

I never took the blower off the head so its either the tb gasket or my injectors need to settle so they would seal. Thanks for the info