I need advice on vacuum routing. I suspect that I have made a mistake routing my vacuum lines. What I've done is kept my vacuum spider but capped off unused hoses.
I haven't been able to get my electric boost gauge wired correctly. Rather than fighting my subpar wiring I bought a cheap mechanical boost gauge as a temp fix and laid it on the windshield so I can see it's readings. What I found is that I have zero vacuum. I've got my MBC set for zero boost. If I raise my RPMs up to 3k I can see a small nudge in the boost. BUT I never see any vacuum at all.
I took the UIM off to investigate. What I'm wondering is what happens if I put the plastic gasket between the throttle body and UIM on backwards? I believe I put it in correctly, but what if? Also, I find it strange that there isn't any gasket or o-ring to seal this. Should I put a thin coat of RTV on it to help seal?
I have it off now, but I had it mounted with this end toward the TB. The port matches the ports on the TB.
The other end facing the UIM. The ports match the 3 on each side of the UIM.
I had the intakes powdercoated. To make sure none of the vacuum niples got clogged I took a hose and put it on each nipple and blew through it. They were all free and open. BUT I found this when I blew through the middle front nipple.
Oil...so I"m guessing my vacuum routing is wrong. But it also seems like it could have been wrong for some time now. Maybe I'm wrong but should my TB be this coated in oil?
Middle nipple on the UIM corresponds with the middle steel hose on the spider.
That steel hose eventually ends up at the purge control valve
One of the two hoses coming off the purge control valve goes to the middle iron
The other I have feeding back into the spider here
And then comes back to the bottom steel hose and I have that feeding back into the bottom nipple on the UIM
What have I done wrong?