I was doing some fixes to a few places I put in the queue and finally got around to and I can't seem to find a spot for the vacuum hose that comes off near the coil (its wrapped in wire loom). It has a hose clamp on it too. Anyone recall where this goes?

 

Ba-Da-Bump... I'd like to know this as well, I have the same problem...

 

back of the plenum, driver side? on my 91 Z, there are 2 lines coming from there - the one that goes to the plenum (has an L-shaped connector, no clamp) and a long line that goes up to the heater control valve.

 

Found it, was the 2nd opti vacuum line, I forgot the optispark has two vacuum lines. Thanks for the help.

 

did the car start w/the line unhooked?

 

yep, it would stumble when starting up but I guess the IAC compensated for it. Its running real good now except for this massive vibration I can't find. Im thinking its the dampener.

 

pasky got a question for you. there are two plastic vacume lines that come out of the fire wall on passenger side with some wire near heater hoses. do you know where to connected theses lines?

 

here is a pic the two over the heater hoses.

 

Heya bowtie, I sent you a PM on how you did your heater hose, had a question about that if you could reply please. As far as those vacuum lines. I believe I plugged one up with a vacuum cap and put another on the passenger side intake vacuum port.

 

Z91:

Ok, just hooked up my heater last night (good *** it still works great). I looked at those two vacuum hoses you pointed out and what I did was buy 1 ft of soft vacuum line and a t-valve, I already had a vacuum hose from the LT1 wiring harness hooked to the intake so I hooked both that one that goes to the heater vent (its one of the ones you posted) and the one on the lt1 harness and plugged it into the t-valve and had the valve plugged into the lt1 intake. So both got vacuum from it. The other line (which goes to the black plastic heater valve near the passenger side manifolds/headers) I just capped off with a vacuum cap at autzone I bought for like a buck. You need one of those vacuum lines plugged in, in order to have your vents inside the car working, otherwise all you will get is defrost. Hope this helps.

 

I second that, I drove around a lil w/o it after my engine swap...

...kinda cold

 

thanks pasky. hooked the lines up and works like a champ. i was getting a hhsss sound when i turned the heat on. it was driveing me crazy. ok now i bought a laptop so i can program the pcm. can you still hook me up with the program i need? and where can i find the cable? thanks again. just curious did you find out about that other vacume line you asked about? i'm woundering if i missed that to. i just can't place it.

 

sure thing, PM me your e-maill address. Give Dale a pm, I told him where to buy the cable but I lost the site, he will probably still have it. As far as the vacuum, it was an extra hose going to the opti. I forgot the opti had 2 hoses.