Might be a dumb question but I have a nipple in my LIM that is exposed. Not sure if it is supposed to be capped or not. Running a Microtech LT10s, 1600cc secondaries, and 850cc primaries, Aeromotive FPR.
Suspect nipple is circled in pic.

 

yes, vac leak...search for a vac diagram to see where it goes...we need more info...emissions? no emissions?

 

if you running no emissions and no vac rack just cap it off. either way it is def. a vac leak.

 

Running with no emissions. I just didn't know if it was fuel related, and I don't think it is so I was concerned on whether to cap it or not.

 

Looks like it's left over from the removal of the solenoid rack, i've got 2 nipples left over from that and no vac leak. Just cap it up if you're not sure

 

it is for the fuel vapor purge valve in the rats nest(orange connector). That cap is for a vac line that went to your secondary fuel rail. Just cap it off if rats nest is removed.

 

wait, that line went to a line in the rats nest going to the purge solenoid, the other goes to your fuel rail, all in all will cuase a vac leak. Damn RATS NEST!!

 

This might help

 

That nipple is where the FPR is supposed to be connected...