82_Camaro

82 CFI Z28. i have a hard plastic vacuum line that in the pics as i was pulling the motor ran across the fire wall. it starts on the pass side and runs to the driver side. i cant for my life figure out where it goes and i believe it may be the reason for my idle problems. anyone have a clue?

ex-x-fire

What picture?

82_Camaro

i put a pic showing the vacuum line and an after pic

tlandoe

What idle problems are you having? And you don't have a picture up. But there are also lines along the firewall that go to the wiper pump that look really similar to the vac lines

82_Camaro

i posted a pic showing it. its the first pic

tlandoe

Ah I see. Lemme look on my car really quick and see what that is... stand by

82_Camaro

thanks

tlandoe

well it plugs right into that little cylinder next to your wiper pump. I unplugged it and it draws less than a pound of vacuum and didn't hurt my idle at all even when I romped on it a little

82_Camaro

Thanks
i looked all over the pump and couldn't find a spot for it. its at work right now cause thats where I've been working on it. ill have to look at it tomorrow. i appreciate it. and i figured out my idle problem. i readjusted my rockers cause i heard a slight tick and after i started it up there was no more up and down in the idle.

ex-x-fire

Make sure your throttle linkage is not sloppy.
You do have to balance the tbi too.
Make sure the egr isn't opening at idle.

82_Camaro

throttle isn't sloppy but ill have to check the egr. thanks

TreeFiddy

The line supplies vacuum to the hvac system, and the cylinder is the vacuum reservoir that feeds it.

Leaving it disconnected would create a vac leak that could affect your idle.

Seven_MPG

I believe that hard vac line operates the vents in the heat/ac system.

82_Camaro

i just looked all over the wiper motor and couldnt find it. if its for the heat wouldnt the heat not work then. because it does. if it is the heat, then where would it go?

LilSki

iTrader: (1)

Wouldn't stop the heat from working but would stop you from being able to change from floor to dash to defrost. It is the vacuum feed that feeds all the vacuum operated doors that direct the air flow of the HVAC system.

82_Camaro

any suggestions on where it would go then?

LilSki

iTrader: (1)

Well my car is an 85 and the CFI cars are quite a bit different. Mine goes up right near the wiper motor where there is a T fitting. One goes to the vacuum ball and cruise control and the other to the HVAC system. I see your vacuum canister is behind the brake booster. My vacuum ball is located in the front bumper.

Also make sure your map sensor is hooked up to vacuum. That looks to be located just to the right of the vacuum canister in your picture.

82_Camaro

well thanks ill have to figure out where the hell to put it if anything ill just leave it hangin. i figured out I'm stuck on defrost because of it so i don't care.

LilSki

iTrader: (1)

If you can't find a place for it you are better off sticking a screw in it and plugging it than leaving it open.

LilSki

iTrader: (1)

I took some pics for you and found the HVAC line actually goes over to the passenger side. But it gets its feed by the brake booster.





Right behind my coil it goes into the harness which ends up going through the firewall.


I hope it helps on your 82

TreeFiddy

I don't know the exact original plumbing, but it should be something like:

Intake vaccum goes to a one-way valve (to keep vac in the canister), which then T's off to the vac canister and the hvac hard plastic line.

If the path back to the intake is left open, you will have a vac leak. If you leave the hard line unplugged, you will have no hvac operation but no other ill effects so long as whatever pipe that goes back to the intake is capped off.

Edit: LilSki posted just before I did - his first pic shows the one-way valve - vac fed from picture left, and T's off to the hvac and canister on the right. In his case though there is no canister (later model), instead a hose goes off to the 'orb of power' in the fender (same function as the canister).

82_Camaro

thanks ill have to take a look. hopefully yours is somewhat the same but i don't have anything like that by the booster. ill have to figure it out. if i can't ill end up plugging it. i really appreciate it though. I'm almost wondering if it was disconnected from before i even bought the car cause i don't even remember disconnecting it and none of that worked in the car anyway. i always thought the doors were stuck in the ducts. ill have to look deeper

$wift

A lil late to answer but for anyone who still has this question, that vac line goes to the EGR Purge control solonoid that has an IN and OUT that is bolted along with the ignition coil I believe this line goes to the out and the in goes to the rear intake connection of the plenum on the passenger side
to be safe look up the vac line routing for the exhaust gas recirculation system and yes this will cause idle problems...hope this helps.