When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
LTX and LSXPutting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.
I have a LQ9 swapped 92 Firebird and I got a new throttle body without the vent tube. My previous therotle body had a vent tube and the vent tube was connected to this part towards the passenger firewall. I'm not familiar with this part circled in the picture, can I cap this off since my new throttle body doesn't have a vent tube?
I tried to do some searching and it might be part of the evap system, but I couldn't get a definitive answer.
Looks like the check valve that the HVAC and cruise need, to keep vacuum stored up for when it goes away during hard acceleration.
Not "vent". Goes to manifold vacuum. You can get that from the plenum or the TB, wherever it's most convenient.
Not sure why they have both the vac supply to the control head, and also the line that works the heater control valve, both connected there. Kinda weird.
Looks like the check valve that the HVAC and cruise need, to keep vacuum stored up for when it goes away during hard acceleration.
Not "vent". Goes to manifold vacuum. You can get that from the plenum or the TB, wherever it's most convenient.
Not sure why they have both the vac supply to the control head, and also the line that works the heater control valve, both connected there. Kinda weird.
Thanks for the reply. Not sure why those were connected there. Looks like I'll be spending some time looking at diagrams and ensuring all the lines are hooked up right because they currently aren't hooked up right.
