32/36 Weber DGEV flooding in one barrel only

[76cj7chick]

As CJ said, the CTO switches are currently doing nothing. The have no vacuum unless you provide it from a vacuum source (carb,manifold). They operate on heat changes and open a "valve" inside them to control the vacuum that controls something else.

The fuel filter should be mounted horizontally, with the return line on top. Don't know if this could be causing your problem, or just adding to it.

One pic of your EGR block off plate almost looks like exhaust has been leaking out the bottom. May just be the pic, but it sure looks like carbon on the manifold.

Not familiar with a 76, but the 85 charcoal canister has 4 hoses, yours looks like it only has 2. Maybe running the wrong lines to the ports you have?

Here is a link to info about what does what for post 83 AMC 258 i6 / 4.2l 's, you may be able to get a little info that can help with what goes where on yours.

Table of Contents

Yes the carb you have is progressive, runs on one barrel until you put your foot into it. I did have a problem with mine in that the linkage on the carb was binding a bit and wouldn't open the second barrel. May check yours, might be open when it shouldn't be?

Hey Yellow85cj,

Thanks for the suggesions. I will check to see if my throttle isn't opening all the way... It may be the problem if the float looks good... And I will turn the fuel filter horizontally.. Any suggestions on where to mount it? I've heard not over the intake or engine because it may burst but I do know jeep installed it there originally..
Also, I did finally figure out it is progressive as you stated. If I pull on the throttle lever (with the carb out of the vehicle) the main barrel opens first then the second.. Perhaps, I need a better/tighter throttle cable linkage or bracket?)
Thanks again for your help!

 

[Supertrunk]

WOW! You are fighting a LOT of problems at once. All of which may be hurting you.

First things first, you need to make sure you have no vacuum leaks. That screw in the EGR valve block off plate and pinched off hose both look suspicious. Get all of your hose routing cleaned up and correct. The fuel filter needs to be horizontal, with the smaller bleed line on top, routing vapor to the charcoal canister..

I sent you the carb info, but it's around 5mb, so I also sent a DropBox download link, if you have any trouble, let me know. Read through the rebuild and reassembly section, and a lot more of this will make sense.

To set or check your float you have to hold the top plate vertical like this:



You measure the secondary throttle plate clearance down inside the barrel. You are looking for the clearance between the brass-colored throttle plate and the silver body. You slide a feeler gage down between the two parts. The area is in red in the photo below. Either side will do. Too much, you have a lean condition, not enough clearance and you can have fuel puddeling on top of the throttle plate.

 

[76cj7chick]

Supertrunk, I did all the changes like you suggested.. Put the filter horizontal with the return line up, capped all the vacuum hoses I could locate. Change most my hoses like yours.. And it still floods the secondary barrel.. (I forgot to mention that the gas also comes out between the adapter plate (single barrel adapter) and carbs gasket).. ONly this time not as bad... Perhaps there is a vacuum leak somewhere?

... I am banging my head on this issue...

Does anyone know the stock Fast Idle Screw settings, Idles screw settings on this carb?

I've listed the carb on ebay... If I can't figure out the issue I will sell it.... But if it is something with my vacuum lines then it will be pointless putting back the carter on it..

If anyone knows the proper adjustments (how many full turns on all the screws please let me know) on the carb

.

 

[Supertrunk]

It sounds like you may have two problems.

First and foremost, is the flooding issue. Things to look at are; the floats are too high, something is holding the fuel inlet needle off it's seat, make sure you have a secondary idle jet in the secondary idle jet holder, make sure you have a secondary main jet in the float bowl, make sure you have an emulsion tube in the emulsion well, make sure you have an air corrector jet on top of the emulsion well, sucking fuel through the accelerator pump passage, sucking fuel through the power valve passage. The last two would be mechanical carb problems that would be covered in the manual I sent you. The fast ide and other setting should be there too.

I just emailed you the basic settings sheet that came with my carb, hope this helps some.

Secondly, if you have any gas leaking out between the manifold and the adapter plate, you have a gasket sealing failure will also be a vacuum leak when running. If you have any gas leaking out between the adapter plate and the carb, you have a gasket sealing failure will also be a vacuum leak when running.

Hope this helps.

 

[76cj7chick]

WOW! You are fighting a LOT of problems at once. All of which may be hurting you.

First things first, you need to make sure you have no vacuum leaks. That screw in the EGR valve block off plate and pinched off hose both look suspicious. Get all of your hose routing cleaned up and correct. The fuel filter needs to be horizontal, with the smaller bleed line on top, routing vapor to the charcoal canister..

I sent you the carb info, but it's around 5mb, so I also sent a DropBox download link, if you have any trouble, let me know. Read through the rebuild and reassembly section, and a lot more of this will make sense.

To set or check your float you have to hold the top plate vertical like this:



You measure the secondary throttle plate clearance down inside the barrel. You are looking for the clearance between the brass-colored throttle plate and the silver body. You slide a feeler gage down between the two parts. The area is in red in the photo below. Either side will do. Too much, you have a lean condition, not enough clearance and you can have fuel puddeling on top of the throttle plate.

Hey SuperTrunk... You may be on to something about the secondary plate... It is solidly CLOSED! I just need to figure out how to open it slightly like the primary barrel... Thanks again for your continued help...

 

[Supertrunk]

Out of the box, the screw on mine was loose, and out of adjustment. It also did not have any thread locker on it to keep it from vibrating loose in the future.

The screw can be accessed from below while attached, but it's easier to take the carb off, turn it over, remove the black steel screw, slather it with blue medium-strength Loctite, replace it, and set the adjustment to (0.05mm / 0.002").

Just to try it, a small flat-bladed screw driver inserted below here will let you turn it:



Read through the shop manual I sent you, and there'll be better instructions.

Hope this helps.

 

[76cj7chick]

Out of the box, the screw on mine was loose, and out of adjustment. It also did not have any thread locker on it to keep it from vibrating loose in the future.

The screw can be accessed from below while attached, but it's easier to take the carb off, turn it over, remove the black steel screw, slather it with blue medium-strength Loctite, replace it, and set the adjustment to (0.05mm / 0.002").

Just to try it, a small flat-bladed screw driver inserted below here will let you turn it:



Read through the shop manual I sent you, and there'll be better instructions.

Hope this helps.

Got it. Thanks. I adjusted the screw and will start it tomorrow. Please keep your fingers crossed

 

[76cj7chick]

GOOD NEWS! I adjusted the secondary throttle plate and NO more FLOODING!
Only issue I have now is after I start the jeep, it doesn't like to start immediately after...

I'm thinking its the adjustment screws...
But then again... I checked all my jets and they aren't what Weber recommended...
Anyone know if the jet size will cause this issue?

Here are the sizes I have in the Weber:
MINE: Original Specs:
----------32/36 DGEV /AV

Primary Main Jet:
175 -------- 140

Secondary Main Jet:
170 -----------140

Primary Air Corrector Jet:
160 --------170

Secondary Air Corrector Jet:
160 --------160

Primary Idle Jet:
060------- 060

Secondary Idle Jet:
050 -----050

Needle Valve:
2.50MM-------2.00MM

The first numbers are what I have... The second are what weber recommends.. And YES, this is a NEW weber.... :0

Would the differences cause any issues with starting?
Anyone know?

AGAIN :ty: for everyone for continued help in this headache...

By the way... I also adjusted the float.. It was WAY too high...

 

[76cj7chick]

Hey Yellow85cj,

Thanks for the suggestions. I will check to see if my throttle isn't opening all the way... It may be the problem if the float looks good... And I will turn the fuel filter horizontally.. Any suggestions on where to mount it? I've heard not over the intake or engine because it may burst but I do know jeep installed it there originally..
Also, I did finally figure out it is progressive as you stated. If I pull on the throttle lever (with the carb out of the vehicle) the main barrel opens first then the second.. Perhaps, I need a better/tighter throttle cable linkage or bracket?)
Thanks again for your help!

Hi Yellow85cj,

I went ahead and put a metal plate between the intake and rubber thingy with the screw in the top... I hope that it's okay.. I would have removed the rubber thingy that has one of the vacuum ports and screw but couldn't since the bolts were quite long and didn't have threads all the way down...
Also, checked the throttle.. And it may not have been opening all the way made some adjustments and (gapped open the throttle plate and no more flooding.)..
But now it just won't start immediately after I shut it down... May just need to tinker with the idle speed and mixture screws... Thanks for your help...

 

[76cj7chick]

So it looks like the carb float and idle mixture screw are adjusted correctly... Still am having a hard time getting the idle screw and choke set...
:dunno:

SO I decided to sell the carb (listed on ebay and craigslist)... I am asking $50 less than what I paid... Which I ONLY was able to install this spring... The price is not set in stone... I am willing to negotiate some too...

Who knows maybe you're that rare person that likes carbs...

:rock::ty:
I appreciate everyones help! And I have LEARNED A LOT! But still am having a hard time figuring the idle and choke settings and decided to go with efi...
So THANKS again everyone for your help!