Probs: vacuum confusion, throttle/idle

[hachi]

I've been lurking here for awhile and have seached a lot but finally decided I need some specific help.
I got a free '89 lx a month or so ago from my sisters friend. It had just been sitting in their carport for over a year but looked in pretty good shape so I took it off their hands to see what I could do with it. The main thing with this is that I don't want to get into it much money wise. So here's what's gone down so far.
I had it on the charger for a long time and it kinda wanted to turn over but wouldn't so I hooked it to the SRT and then it really started cranking over. It started finally and went into high idle mode (~3k rpm) but died when it came out of high (dieseled a bit first). So, I knew it would run and was worth more attention to make it good. I replaced plugs, wires, cleaned distributor, replaced some of the really hard vac tubes, and changed oil/filter/air filter.
It starts alright but always dies in normal idle mode. If I rev it up the engine sounds nice and smooth but struggles getting much below 2K. After replacing more vac lines and starring at TONS of insanely confusing vac diagrams from that Russian site and others I found on here I noticed that my carb was missing some of the lines (not lines but actual pipes into the carb w/ bearings stuffed into the remaining hole) and had a few plugged lines. It looks like someone in the past tried some vac removal. Not knowing if this was the prob, or vac leak, or carb gaskets... I just went to the junk yard a took the carb off of a '88 lx they had just gotten that said it "ran good". Anyway, it looked good. I have it in but now I'm really confused about some vac lines. My carb seems to have some extras and I'm confused in general. I'd love it if someone could take some photos of their carb at different angles so I could get some of the routing right.



In this pic you can see the pipe (line?) just over the top of the carb. I have no idea where this needs to go. You can see it in the other pics too.







This section is on the drivers side of the carb down low. All the diagrams I've seen only show one vac line but this has two so I don't know which needs to go where. Other pics are for you to look at my mistakes.

I just need to get this thing put together right before I blame the idle prob on anything else. Also, when I do get it together I'm unsure on the order of adjusting things. I went through that other post that ended up being a distributor prob but I'm still off a bit on adjustment. People talk about throttle adj. but all the pics point out the stop screw and mixture screws. None say THIS is the throttle adj. Is it just adjusted with the bolts on the throttle cable?

If you've made it this far thank you very much for your time.

[A20A1]

Your first missing vacuum line might go to the underside of the air cleaner or it could go to one of the ports near the base of the carb...
What does the number say on the little white tab stuck on the metal vacuum line?


On the A/C Idle boost diaphragm some carbs had two ports others had only one, I'm not sure which side will pull more, maybe the rear port like how you have it hooked up now. You can swap your A/C idle boost from your old carb onto this one and hook it up that way. I'm not sure if plugging the diaphragm is good, since I forget if the two ports are independent or connected, if it's connected then plugging the extra port will be fine, if it's independent then plugging it could cause tiny resistance to the diraphragm movement cuase of the build up of vacuum and pressure as the diaphragm move, but then the diaphragm doesn't move much anyways so I doubt it will hurt that much.

I added the adjustment order for idle in my post here https://www.3geez.com/showthread.php?t=44074

If you want remove the accelerator cable from the carb, it doesn't need to be there to set your idle speed.
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[hachi]

I think the connection behind the carb is #17.

[A20A1]

yeah #17 goes underneath the air cleaner

#3 goes to the base of the carburetor. #3 is next to #7 I think... problem is your #3 is bent wrong... rebending it could cause it to tear the metal...
#3 and #7 both go side by side to the two vacuum ports at the base of the carb.


Don't forget #8 and # 33 which also connect to the underside of the air cleaner.

[hachi]

Ok, #3 was the one I was confused about. This is a pain because the car is parked at my parents home 45min away. So, I set aside a few hours and do what I can here and there.

I think I got all the vacume lines in the right places... I hope. I tried to set the timing but I can't even get it to idle so it's hard to adjust. I had someone sit in the car and try to bring the rpm's down as far as possible ~1200 and I got the timing somewhere in the neighborhood. As the rpm's get down in that range I start hearing a big sucking sound that seems like it's coming from the rear passenger side of the engine bay. So, I guess I have a big leak I need to start looking for. Any ideas on how to find it as fast as possible?

Thanks again.

[A20A1]

well if your car is idling high, using carb cleaner to find a vacuum leak may not work... it needs to have a fairly low idle above 800 rpm, close to 1000 rpm. You might be able to find it at 1200.

Are you running the carb with the air cleaner off the carb?
If so;
Did you plug the vacuum lines you removed when you removed the air cleaner?

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