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Engine Help identify ports on Rochester varajet 2 carburetor for 2.5L iron duke

Engine Help identify ports on Rochester varajet 2 carburetor for 2.5L iron duke

jhur

Jeeper
Posts
9
Thanks
2
Location
The South
Vehicle(s)
'81 CJ5
Hey all, my 81' CJ5 only starts if I spray primer on the carb and I have to feather the gas for a while or else she dies. When I attempt to drive around it starts to sputter and backfire so I've been trying to learn about what could be wrong. Starting with replacing vacuum lines, many of them are worn or disconnected. I've tried to label alphabetically so someone could reference and hopefully tell me where it's supposed to go.

I confirmed the electric fuel pump is delivering fuel to "G" on the pictures, is this the correct port for the fuel? I ask this because I don't think it's getting enough fuel as when I pull on the accelerator when the jeep is off I read on here that you should see gas squirt in the bowl but nothing. If I pour a little gas in the carb and crank it she fires right away and then dies.

I also found the vapor canister in the engine bay completely disconnected so I just set it aside but I'm assuming one of the ports goes to that.Inked_1.webpInked_2.webpInked_3.webpInked_4.webp
 
Solution
I would say that to start you need to do a complete rebuild of the carb. Since you have no fuel squirting when the carb is opened the accelerator pump is bad.

Get a rebuild kit and just clean and replace the item's as instructed in the kit.

As for the vacuum lines, vacuum hose is cheap so replace them all. Don't forget a new fuel filter and PCV valve also.

'A' should not be open, I believe 'E' is plugged (not drilled), 'F' is your bowl vent (it should be ported to the air cleaner), 'G' is fuel inlet from the pump, 'H' is the electric choke, 'I' is your valve cover breather and I added a pic of the PCV valve location. Not sure about 'J', 'K' 'L' but I am looking.

Does Texas have smog inspections? It might best to de-smog the CJ...
I would say that to start you need to do a complete rebuild of the carb. Since you have no fuel squirting when the carb is opened the accelerator pump is bad.

Get a rebuild kit and just clean and replace the item's as instructed in the kit.

As for the vacuum lines, vacuum hose is cheap so replace them all. Don't forget a new fuel filter and PCV valve also.

'A' should not be open, I believe 'E' is plugged (not drilled), 'F' is your bowl vent (it should be ported to the air cleaner), 'G' is fuel inlet from the pump, 'H' is the electric choke, 'I' is your valve cover breather and I added a pic of the PCV valve location. Not sure about 'J', 'K' 'L' but I am looking.

Does Texas have smog inspections? It might best to de-smog the CJ and the engine looks like it could use a bit of degreasing :) ... :chug:

pcv.jpg
 
Solution

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