So I'm running the FD UIM and TB with an S5 LIM on my '87 TII.

I just noticed that I haven't hooked up the vac lines for the Secondary Injectors Air Bleeds, I believe these are supposed to see a source of metered air but I am not positive which nipple on the FD UIM is good for this?

Also, I wanted to check and see if I had the OMP vac line hooked up okay. I have it routed to the big nipple on the front of the FD UIM but I have read that it is only supposed to see metered air too.

Pics of nipples on FD UIM:





Thanks,
NJGB

 

Hey NJGreenBudd...... Where did you put the fpr vac line on your fd uim? Mine is running super rich and back fires at start up then dies. Only on my 3rd attemt to get it running she then will fire up and idles perfect at 800.

I blocked off my omp,installed super short bolts with high strength locktite (red) where oil injectors use to be. Ended up running Secondary Injectors Air Bleed back into the lim.

 

Okay, let me correct myself, I had the OMP vac line routed to the smaller nip right above the large one on the front of the UIM. I am actually just going to remove the OMP stuff cause I can't seem to get the linkage to mate to the FD throttle body, I will yank the injectors and lines for now but will probably just cap the vac spider for today and run premix.

The injector air bleeds are what I am most concerned about, where would these go? They are important for atomizing the fuel and help at idle to keep it steady.



The FPR vac line goes to the LIM not the UIM, there is a sideways nipple between the two secondary injectors that you can use.

 

Regarding the airbleeds for the injectors thanks to scotty305 and arghx I have the info I needed. It turns out they are both fed from metered air before the plates but there is no nipple on the FD UIM for this, but essentially plumbing it back into an intercooler pipe prior to cooler would work.

I just drove the car around and tuned it up to 11psi with no real problems, with them all capped. Seems good so far but I will end up hooking up the fuel injector air bleeds in the near future just cause it seems like an alright idea to me. The OMP is going bye byes though, I'll have a set of brand new OMP lines for sale if anyone wants them.