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1984-2001 Jeep Cherokee Rear Leaf Spring (4 Leaf) Pair1984-2001 Jeep Cherokee Front Upper & Lower Control ArSwag Off Road BIG-HIT TJ-YJ Rear Bumper

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Unread 02-24-2014, 02:14 PM   #16
moto450r
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Quote:
Originally Posted by 86cj74.2L View Post
With sediment in your fuel bowl make sure the emulsion tubes are clean.

Soak everything not plastic overnight. Then blow all passages clean with carb cleaner.
I saw some stuff in one of the tubes but when I took the pics it was gone. I'm sure its still in there. What will enlarging the tubes to .037" do? I am not nuttered....errr I mean the Jeep is not Nuttered, if that has anything to do with it.

Tubes measure .032"

(had to put a rag on them so the iPad would focus)





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Unread 02-24-2014, 02:48 PM   #17
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Back to this vacuum thing.... is the gap they say should be .035" measured here? IF so, ummm, I think mine is off by a mile!!!

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Unread 02-24-2014, 03:26 PM   #18
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Both main jets.

One is a 392 and the other is 389. These should be the same size on both sides, FSM says 392. YaY!

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Unread 02-24-2014, 03:38 PM   #19
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The gap is where the plate and barrel (step up piston?) touch. You are showing zero gap from the camera angle.

Section Bd Cooling and Fuel in the FSM has good reference material as well as the carter Service Manuals.

All three are available with links here somewhere.

For some reason my phone is not letting me take a snapshot of the page to post as a picture. I have most of the FSM saved as PDF on my iPhone via QuickOffice Pro
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Unread 02-24-2014, 03:46 PM   #20
moto450r
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Quote:
Originally Posted by 86cj74.2L
The gap is where the plate and barrel (step up piston?) touch. You are showing zero gap from the camera angle. Section Bd Cooling and Fuel in the FSM has good reference material as well as the carter Service Manuals. All three are available with links here somewhere. For some reason my phone is not letting me take a snapshot of the page to post as a picture. I have most of the FSM saved as PDF on my iPhone via QuickOffice Pro
I'll look at the FSM. The instruction sheet shows to measure between the tang and groove of the plates.



The FSM shows the gap is measured like 86CJ said! FSM wins. (and 86cj too).
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Unread 02-24-2014, 04:07 PM   #21
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Quote:
Originally Posted by moto450r View Post
I think the little wire spring on the "vacuum piston assembly" is messed up?
They don't show it in the exploded view of the instructions.
When I opened the top the spring was behind the "right" metering rod and the left side of the spring can be seen laying on the metering rod arm.
How should this spring be routed?



You can see how the misplaced spring has allowed the left metering rod (see the shiny at the bottom) to rub in the tube.



Here is another view of the sprung spring

Quote:
Originally Posted by John Strenk View Post
The left side should be the same as the right side.

I just got sting by this myself only the spring on mine is warped and is always slipping off the needle. When it happens, the needle gets stuck and the engine rpm shoots up to around 3000 RPM.

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Originally Posted by moto450r View Post
I'm hoping I can bend it back into shape. John would you have a picture of what it should look like?

Here is what mine looked like originally:


Setting the float on the jeep is fun.



and use two wrenches
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Unread 02-24-2014, 04:19 PM   #22
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A stiff wire to dig out the emulsion tubes.

The .037 drill bit is a numbered bit. I believe its a #63. Double check.

.092 I thought was the main jet size. I wonder if the 392 is a .092 and the 398 is the .089

There is a chart in the FSM that gives jet sizes per carb. (Auto vs Manual at least).
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Unread 02-24-2014, 04:41 PM   #23
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Both main jets.

One is a 392 and the other is 389. These should be the same size on both sides, FSM says 392. YaY!

Glitch fixed! resized the 389 to .092
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Unread 02-24-2014, 04:53 PM   #24
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I meant 389........

Sometimes the jet bore is not a strait bore to promote atomization. Its cupped with a sharp edge on the top of the hole.
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Unread 02-24-2014, 05:15 PM   #25
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Originally Posted by 86cj74.2L
I meant 389........ Sometimes the jet bore is not a strait bore to promote atomization. Its cupped with a sharp edge on the top of the hole.
Yeah this is a temp fix. I'll be looking to find the correct jet.
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Unread 02-24-2014, 05:47 PM   #26
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Finally got it.
image-3465591286.jpg

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Unread 02-24-2014, 05:57 PM   #27
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At least the metering rods are the same! You can see the bottom one is a bit worn from the spring being ajar.

But of course they are the wrong number! they should be 2384. ARGH!

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Unread 02-24-2014, 06:22 PM   #28
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Quote:
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Finally got it.
Thanks!
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Unread 02-24-2014, 06:33 PM   #29
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Should one of these seals be on the pump shaft? There sure is a big hole between the shaft and carb body. Nothing is shown in the FSM or instructions.

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Unread 02-24-2014, 07:37 PM   #30
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Not that I recall.
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