: Weber install, desmog questions... need help please!!


Danny128
05-27-2002, 07:53 PM
I just started these projects along with new headers and exhaust today and have a few questions.

1) Which hose, of the two, at the distributor go to the carb? What is done with the other one. I think its the vacuum advance thing they are coming out of?

2) Where does the hose coming from the pcv valve go? Does it connect to the L-shaped pipe coming out the very back top of the engine? If not, whate needs to connect to that L-shaped hose? What needs to be done with the hose coming out of the tee right above the pcv, just cap it off?

3) I've been told that some people run one of the hoses to the new air cleaner, which one goes there or does one even need to go there?

4) There were two sensors, it looked like, in the housing where the thermostat is that were connected to vacuum lines. I just removed them and plugged the hole. Is this ok? There was a hose on the right side of the engine coming from the left side that connected to a black cannister looking thing and I capped it off, is this ok to do?

Thanks for your help.

Danny

The Jerk
05-27-2002, 10:23 PM
dam bro i did teh same set up but cant remember for teh life of me what goes where. i know one goes to teh brakes assuming you have vacume brake which im sure you doo. the other goes to teh engine l shapped thing your talking about. teh black thing is the charcol canister which i too capped off cuz i ran no return line. jiMMy

SpaceGhost
05-28-2002, 07:15 AM
Originally posted by Danny128
I just started these projects along with new headers and exhaust today and have a few questions.

1) Which hose, of the two, at the distributor go to the carb? What is done with the other one. I think its the vacuum advance thing they are coming out of?

The one nearest the cap is advance and should be connected. Leave the other off.

2) Where does the hose coming from the pcv valve go? Does it connect to the L-shaped pipe coming out the very back top of the engine? If not, whate needs to connect to that L-shaped hose? What needs to be done with the hose coming out of the tee right above the pcv, just cap it off?

The hose from the pcv goes to manifold vacuum, isn't that where it is connected now? The vent or "L or S" shaped hose in the valve cover goes to the plastic fitting on the air cleaner. Didn't have the T in pcv line so, cap it off.

3) I've been told that some people run one of the hoses to the new air cleaner, which one goes there or does one even need to go there?

See above, the vent from valve cover goes here.

4) There were two sensors, it looked like, in the housing where the thermostat is that were connected to vacuum lines. I just removed them and plugged the hole. Is this ok? There was a hose on the right side of the engine coming from the left side that connected to a black cannister looking thing and I capped it off, is this ok to do?

Yes, capping is optional, they are temp switching valves that pass or block vacuum when they reach predetermined temps. These can be replaced with plugs if you want to clean it up. 1/8" pipe (brass) I believe, just be sure to use thread sealant and don't over tighten, or the housing will crack.

Thanks for your help.

My pleasure.

Danny

Pin Head
05-28-2002, 08:03 AM
Actually, the port on the outside (farthest away from the cap oon the outer part of the vacuum can) is the advance and is the one you hook to ported vacuum (no vacuum at dile; vacuum increases with throttle). the inside port is vacuum retard. No use for this on a de-smogged engine.

SpaceGhost
05-28-2002, 09:53 AM
I'll go sit in the corner for let's say............2 minutes. Thanks Pinhead!

Mr McGee
05-28-2002, 02:08 PM
Some advice a mechanic friend gave me:
"Retard is for Retards"

Danny128
05-28-2002, 02:16 PM
Thanks for the help. The hose from the pcv valve went to the air cleaner assembly that I took off. I'm not sure what manifold vacuum you are talking about.

SpaceGhost
05-28-2002, 02:29 PM
For the pcv system to function there has to be a source of vacuum on the valve to evacute the crankcase pressure. My first hand knowledge of each Cruiser is limited to those I've worked on and of course my own. On the stock 68 F motor it connected to the spacer/riser under the carb which is below the carb, hence the term manifold vacuum. It could in fact connect to a port on the manifold and accomplish the same thing, however it would likely be feeding the oil vapors into a single port or cylinder, which is why it is generally connected before the runners.

Manifold vacuum is highest at idle with peaks just after you let off the accelerator, and is very low above idle. Ported vacuum (not related to the pcv) is above the carb throttle plate and increases from none to max just above idle. It is used to advance the timing if vacuum is present, via the canister on the distributor.

I am not familiar with the connection to the air cleaner you mentioned. Is this stock as far as you know, or has it been modded by a po? The line that goes to the air cleaner should be clean filtered air into the crankcase, not a source for the suction required to make it work properly.

Maybe I need more than the 2 mins already spent in the corner! Can anyone add or correct this?

Danny128
05-28-2002, 03:07 PM
I believe its stock (2F in a 84 fj60). The pvc hose and L-shaped one on top of the engine both went to the air cleaner assembly, thats why I'm having a problem figuring out where they both go. I saw pictures of one guy putting the pvc hose into the L-shaped one and having nothing going to the new air cleaner on the weber. I'm also confused now about the vacuum advance. Several people have told me it was the one closest to the distributor, while someone else just said it was the other one??

Pin Head
05-28-2002, 04:00 PM
Originally posted by Danny128
I believe its stock (2F in a 84 fj60). The pvc hose and L-shaped one on top of the engine both went to the air cleaner assembly, thats why I'm having a problem figuring out where they both go. I saw pictures of one guy putting the pvc hose into the L-shaped one and having nothing going to the new air cleaner on the weber. I'm also confused now about the vacuum advance. Several people have told me it was the one closest to the distributor, while someone else just said it was the other one??

Both the PCV and L shaped hose on the valve cover are crankcase ventilation, but if the PCV is not connected to intake vacuum, it is not "positive" crank case ventilation. The L one goes to the air filter. It connects outside of the filter element so that in the event of a backfire through the carb, you don't blow the pan off.

It is the outer line that is the advance. Just flip the cap off and pull a vacuum on the line and take a peek at which way the plate turns. the outer line turns the plate CCW, which is advance since the rotor turns CW.
HTH

Danny128
05-28-2002, 05:37 PM
Thanks Pin Head,

I'll put the L-shaped one to the new air filter, now where does the pcv hose go?

Pin Head
05-28-2002, 07:39 PM
It goes to the intake manifold from the valve lifter cover plate. Loot for a fitting or a plug somewhere on the intake manifold, usually right under the carb on the side.