carb vacuum help

shauck · 12-07-06, 05:03 PM

minimum vacuum lines totally de-smogged
If no pics maybye somone can tell me where the vacuum lines go from the carb here is whats on my fj has to hook them to

1. dizzy
2. looks like a black rubber shock located on intake manifold near firewall it also connects to brake booster.
3. air cleaner
4. its white on top HAYNES CALLS IT A VCV FOR EVAP (vacuum connect on top)(vacuum connect out both sides, one side has a cap labled 1/8 the other connects to metal vacuum line that runs along firewall) The bottom is black and has a vacuum line running to the black rubber shock thing (#2) This is zip tied to my master cylinderIts the only smog I am aware of AND would like to know what it does? do i need it? and how do I know if it is working. Thanks for the help. I tried a local mech but me with lack of $$ and him lack of cruiser exp we didnt get far

cbmontgo · 12-07-06, 06:49 PM

Are you talking about this part? It is officially called the VCV, and I have no idea what it does. I just ordered one today, because mine cracked off at the outlet and I am replacing my vacuum lines and tuning up my 2F...

It sits directly above the HAC (high altitude cnetriflugervulleram44##a or something); you can see it in this pic.

shauck · 12-07-06, 06:56 PM

yes and with every pic i have no idea where the vacuum lines go there are many on my carb and do not know where to put them

shauck · 12-07-06, 06:58 PM

thats the only HAC HVAC CVC DVC ECT that i have and I have all the outlets capped except the one that goes to the metal tube to the firewall and not sure if tthats correct

cbmontgo · 12-07-06, 07:13 PM

Quote:

Originally Posted by shauck

yes and with every pic i have no idea where the vacuum lines go there are many on my carb and do not know where to put them

Call your local Toyota dealership and have them fax/email you the vacuum piping diagram, or get a 2F emissions manual. It will really help out.

shauck · 12-07-06, 08:07 PM

it have that when you have no smog it makes no sense to me. It sends the lines to valves control boxes etc. I know one of the vacuum comes from the choke breaker back to the top of carb. how about the other one that comes off the other side that looks similiar, in other threads it is much longer vacuum hose do not know where it goes. Heard it might run secondary. Maybye someone knows which ones are okay to plug. I will try to figure out how to post pics on this and label so someone can poss help. Ive SPENT HOURS N HOURS looking through threads

bridge253 · 12-07-06, 11:37 PM

Hey, mine sounds almost exactly like yours 86 completely desmogged, newly rebuilt, wont run. I will post a pic of my carb soon so you can compare. It wants to run but just wont sustain once turned over.

shauck · 12-08-06, 07:35 AM

THANKS, I will post a pic of mine tonight(as long as I can figure out how, it might be able to help you out. Mine runs pretty good, having vacuum lines on correct doesnt cost anything and its pretty important.

soggy60 · 12-08-06, 10:13 AM

The gizmo (VCV) in the pic controls suction from (through) the charcoal canister (via plumbing in the 'direction' of the brake booster), to the intake manifold in the area of where the EGR pipe and PCV hose attach....

kevinmrowland · 12-08-06, 12:21 PM

I think my record is stuck.

You need to get this manual.

Especially if you do NOT have emissions, it does not just show you where things go, it explains how things work, you can not remove things or change the way things work unless you understand what they do.
Trust me it is a great read, very informative.

shauck · 12-08-06, 06:55 PM

Thanks I will get that manual.

bridge253 · 12-08-06, 08:10 PM

what was your engine doing when you couldnt get it started ?

shauck · 12-09-06, 03:52 PM

On really cold mornigs it just keeps turning over. Typically(above 5 degrees) when I first go out as soon as I go to start it gives a little hope then takes about 3 tries at 10 seconds each. Once it starts it runs pretty good but only to about 3000 rpms. I believe its the vacuum on my secondary is not hookd up. I dont know what to supply it with.

shauck · 12-09-06, 05:20 PM

SOOO STOKED Just hooked my secondary to my intake manifold and WWWAAAALLAA my FJ has some power!!! This is my first FJ and the whole time I have been driving no secondary now a little get up and go. Probably why I was getting such good fuel economy. Thanks IH8MUD

Cruzerman · 12-10-06, 07:48 AM

I don't think there is a vacuum line to run the secondary.

brian · 12-10-06, 09:11 AM

Quote:

Originally Posted by Cruzerman

I don't think there is a vacuum line to run the secondary.

there ''is'' but it's all done inside the carb.

Heartworm · 12-10-06, 09:24 AM

I suspect that you have finally got vacuum assist to your spark advance on your distributor, which would increase power. In my desmog, I have a vacuum line going from the ADVANCER PORT on the passenger's side base of the carburetor to the primary spark advance diaphragm (that is closest to the distributor). The outer diaphragm on the distributor is plugged.
There are 4 small ports on the passenger side of the carburetor base. Three of these are on a horizontal line and one is slightly above the most rearward one of the three in a row. The advancer port is the last one toward the rear of the three in the horizontal row.

shauck · 12-10-06, 12:04 PM

Thats what I need. Spelled out for a 1st grader. I will go out and check. I know I have 2 vacuum lines going to my dizzy. So your sayng I only need one and plug the other.

kevinmrowland · 12-10-06, 01:37 PM

Quote:

Originally Posted by shauck

Thats what I need. Spelled out for a 1st grader. I will go out and check. I know I have 2 vacuum lines going to my dizzy. So your sayng I only need one and plug the other.

We need to pick a thread and stick with it, this is getting confusing.

The outer, smaller diaphragm on the dizzy is the High Altitude Compensation diaphragm, it advances the timing another 6 degrees when your HAC valve thinks the truck is over 5,000elv.
If you consistently go from sea level to above 5,000 you can take a vacuum line from that, to an extra VSV that was removed in the desmog and wire that to a switch on the dash (I used a spare defog switch so it has a status light) push the switch and you get manual high altitude compensation.

However, given the problems you are having getting it to run correctly I would say to put that on the back burner for the time being and just plug it.

shauck · 12-10-06, 05:31 PM

did it and its runnig great. I wll see if it starts easy in the morning.