Scott 89t2

next week they are all gone well most.

I'm still trying to figure out a couple things. the lines on the back on the UIM. there is brake booster. and one for FPR, one for oil injectors (4 way spliter) and one between primary injectors. is there a 4th? some posts say there is. I only see 3 in my FSM.

also are all 3 / 4 nipples the same? or do they have to go to the right places?


here is my drawing from tonight I am missing anything? the TB coolant line will be gone too with a new TB from BDC.
(is the BAC ok without the coolant line?)

NZConvertible

I see you're getting the manifold pressure signal for the FPR from a different nipple than stock. Double check that that nipple is fed from downstream of the throttle blades. Some of those nipples use passages in the TB spacer plate and TB to take air from the other side of the throttles, so they don't see vacuum.

Rotary Racer

Not to shabby the only thing I would change would be leave your blow off valve where it is and move the vac lines for the presure sensor and pressure regulator to the bottom nipple on the front of the UIM (that is the 3 cluster of nipples facing the front of the car use the bottom one). Have fun

HAILERS

Never seen a series five turbo......on my series four turbo, I have four small nipples, not counting the big one for the brake booster.

Only the bottom one on the series four pulls a vacuum. The others come from the front of the throttle body.

Stock, the bottom one that has a vacuum, goes to the water thermo switch(best I can do at the moment) which feeds the double throttle diaphram.

One goes b/t the oil injectors which is for the fuel injector air bleeds.

A slightly larger one for the oil injector spider.

A fourth one that was capped off. Maybe some thing to do with a automatic transmission????? Never seen a thing going to it.

As the man said, I'd make sure the fpr is going to the one with the vacuum. Then again I'm talking series four, which can get you into trouble. I learned the hard way the series five n/a is quite a bit different than series four on vac lines.

BAC valve does not need the water pipe attached to its side. Does nothing useful, unless you live in an extemely cold climate. I/we think its for deicing purposes for the bac in icy cold weather.