Question about fuel flow in carb

[locknload68]

While trying to get my car to idle right, I noticed that the thing in the middle of the primary barrel (venturi?) was spewing fuel out of it at idle. When revved up, the fuel comes out as a mist, but at idle it's just liquid. Is it supposed to be doing that? If not, what could be causing it?

Here is a pic of what I am talking about. Thanks to A20A1 for the pic.

http://home.woh.rr.com/picshere/images/carb.jpg

[A20A1]

yes the smaller one should bleed a little bit of fuel durring idle.

[locknload68]

I'll see if I can take a video of it cuz it seems like there's way too much coming out.

[A20A1]

Well two things to check are:
- idle speed
- float height

[locknload68]

The fuel level in the bowl is right where it should be. The idle speed is another story.

When the car decides to idle, it jumps between 1000-1500 all the time. Most of the time, once it is warm and off fast idle, it stalls when I stop.

I was thinking that so much fuel coming out of there could be causing the sporadic idling.

[A20A1]

nah the fuel is coming out cause it's swithching off idle and pulling more air thru the booster. If you can get it to idle at 1,000 - 1,100 (AUTO) in neutral then thats okay.

[Mike's89AccordLX]

Maybe it's stalling b/c of a vacuum leak in your vacuum advance diaphram. It sounds like the problem with yours b/c after idle it won't run. What rpms does it stall at? It might just be a vacuum leak somewhere else if it's not the Vac. Adv. Diaphram.

-Mike

[locknload68]

The thing is it doesn't always stall. The tranny is manual. After 3 years of messing with the carb, I have never been able to get it to idle where it is supposed to, it's always around 1500 or so. And I've never had a problem like this in the winter.

The vacuum on the manifold is good, around 20in Hg, if I recall correctly.

I am beginning to think that maybe my brake booster is causing a vacuum leak. Quite a few times I have let off the brake at a stop when the car didn't stall and the rpms jump up. But I can sit in my driveway and push the brake all I want and it won't stall.

Dammit, this is so hard to explain cuz there is no consistency with it, besides it only happening when fully warmed up.

[DanG86LX]

Well, u couldn't say it better yourself:

When the car decides to idle, it jumps between 1000-1500 all the time. Most of the time, once it is warm and off fast idle, it stalls when I stop.

So u treated a "no idle" prob by turning idle screw up ! Bad move man. Now ur throttle is opened enough to cause suction @ buster venturi and WYSWYG jumping idle!
Do what A20A1 suggested: turn idle screw down! This car should idle even at 500rpm, believe me!
If it stops, i agree with Mike(s):
1. Major vacuum leak.
2. Blocked idle passages in the carb

[locknload68]

Originally posted by DanG86LX
Well, u couldn't say it better yourself:

When the car decides to idle, it jumps between 1000-1500 all the time. Most of the time, once it is warm and off fast idle, it stalls when I stop.

So u treated a "no idle" prob by turning idle screw up ! Bad move man. Now ur throttle is opened enough to cause suction @ buster venturi and WYSWYG jumping idle!
Do what A20A1 suggested: turn idle screw down! This car should idle even at 500rpm, believe me!
If it stops, i agree with Mike(s):
1. Major vacuum leak.
2. Blocked idle passages in the carb

Turning the idle screw down any further makes it stall. For 3 years the car has been idling around 1500 because we couldn't get it any lower without porblems. I changed nothing and now it's doing this crap all the sudden.

I'm thinking there may be blocked passages because the car sat for 2 years not running. I don't really have the time right now to rebuild the carb and I'm kinda afraid of screwing it up even worse.

[A20A1]

Well you can have internal vacuum leaks in the carb and that wont affect overall manifold vacuum but it will lower the idle.

Did you replace the vacuum lines under the air box with new ones?

5/32" Vacuum lines

Anyways you can't keep removig vacuum lines and hooking them back up expecting them not to leak... the ends expand and no longer seal.

When you adjusted the idle on the car did you have any on the vacuum lines under the air box removed? or did you lift the air box just enough to get to the screw?

You might want to go over everything, first adjusting your ditributor body without vacuum advanced hooked up... it should be at TDC

Then hooking the advance up and adjusting the base idle / throttle stop screw at the back right of the carb. set to 500

Then put the car in gear and adjust the idle again, but this time you only adjust the idle diaphragm at the front left of the carb. I think you set it back to 500.

Then you turn on the A/C fans and headlights and adjust the A/C idle boost screw...

hmm... I think the headlights and fans are on for the first idle diaphragm adjsutment too... but not the A/C

I know thats not perfect but I'm not sure of the proceedure on the Manual trans cars.

[POS carb]

make sure the power valve has vacuum going to it, if not it will flood at idle usually