Stuck on the side of the road

[TroyaCantrell]

So as an update to my earlier post the CJ did not make it home. Currently stuck waiting for the wife to come with a tow rig.

It seems to be starving for fuel. It filters are good, there is pressure is the line all the way to the carb. It's a Rochester 2 jet. Pulled the top off and bowl was dry , assuming float is sticking.

If it sits it will start and run for bit, a load sea to be a problem and sometimes even just parked applying the throttle will cause it to stall.

Any other ideas to try while waiting for my tow??




Troy Cantrell
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Build thread - '66 CJ6 :
http://www.jeep-cj.com/forums/showthread.php?t=15075

 

[BusaDave9]

Is it dieing when it gets hot? Maybe vapor lock.
You were also thinking the float was stuck. Try disconnecting the fuel line from the carburetor and see how the fuel flows when you crand the engine.
Check out this link: http://www.jeep-cj.com/forums/f99/engine-wont-start-troubleshooting-guide-19494/

 

[tarry99]

So as an update to my earlier post the CJ did not make it home. Currently stuck waiting for the wife to come with a tow rig.

It seems to be starving for fuel. It filters are good, there is pressure is the line all the way to the carb. It's a Rochester 2 jet. Pulled the top off and bowl was dry , assuming float is sticking.

If it sits it will start and run for bit, a load sea to be a problem and sometimes even just parked applying the throttle will cause it to stall.

Any other ideas to try while waiting for my tow??

Troy Cantrell
Sent from my iPhone using Tapatalk
Build thread - '66 CJ6 :
1966 CJ 6 build - Jeep-CJ Forums

Do like Dave said and pull the line and see if there is an ample supply of fuel when cranking into a container. I would also put a clear fuel filter in line just before the Carb. What did you do to the fuel tank when you rebuilt that Jeep? was it flushed? Those I believe were bottom draw fuel tanks in that year....... could be some debris in there that's getting stuck once the system is starting to draw............Could be you have a non vented fuel cap on your tank which is creating a vacuum........should be a vented cap for that model unless you have added a vent in the system. Easy test is just drive it slowly without the cap on.
Could be your vent at the carb.?

 

[TroyaCantrell]

Is it dieing when it gets hot? Maybe vapor lock.
You were also thinking the float was stuck. Try disconnecting the fuel line from the carburetor and see how the fuel flows when you crand the engine.
Check out this link: http://www.jeep-cj.com/forums/f99/engine-wont-start-troubleshooting-guide-19494/

Made it home.

Thanks Dave. No, started acting up as soon as I fired it up to leave work. Interestingly it was parked leaning to the driver side and was running fine when I parked it. (Acted up on the way in, posted on my build thread) but ran fine on the final leg to the office and up to my parking spot. The when I tried to leave it would start but die with throttle. Got it going and pointed down hill and it was fine, flat land it was fine mostly, up hill no go.

When I crack the fuel line at the carb there is pressure there, fuel comes out pretty good (just residual pressure) as no one was with me on the side of the road at that time. The filter there at he carb looked good too, even tried without it.

I took the top loose there on the side of the road and the bowl was dry/ very low. I am thinking it is just full of . There is carb cleaner in the fuel now and it could have just clogged up the jets or is sitting in the bottom of the bowl.

I think a cleaning and rebuild kit are in order.




Troy Cantrell
Sent from my iPhone using Tapatalk
Build thread - '66 CJ6 :
http://www.jeep-cj.com/forums/showthread.php?t=15075

 

[TroyaCantrell]

Do like Dave said and pull the line and see if there is an ample supply of fuel when cranking into a container. I would also put a clear fuel filter in line just before the Carb. What did you do to the fuel tank when you rebuilt that Jeep? was it flushed? Those I believe were bottom draw fuel tanks in that year....... could be some debris in there that's getting stuck once the system is starting to draw............Could be you have a non vented fuel cap on your tank which is creating a vacuum........should be a vented cap for that model unless you have added a vent in the system. Easy test is just drive it slowly without the cap on.
Could be your vent at the carb.?

I will do the crank test now that I got it home. The tank is new, old one was shot. Almost literally as j found live .22 ammo under and behind it when it came out. Some of the original fuel lines are still in use hard and soft, the soft were already mostly replaced and I changed the rest. That was the first time it broke down, cracked fuel line.

Pretty sure the cap vents as I have had a tank or so though it already.

Vent at the carb? Where / what does that look like? I will check the books for it too.


Troy Cantrell
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Build thread - '66 CJ6 :
http://www.jeep-cj.com/forums/showthread.php?t=15075

 

[Barry2]

Take the float valve needle out and unscrew the brass seat and see if there is a chunk of crud in there.

 

[TroyaCantrell]

Pulled the carb, holly the bowl had a bunch of in it. There was a bunch around the screen in the corner too.

It looks like the needle valve on the float was good, it still is playable. I will need new gaskets for reassembly for sure and they should come in he kit.

What are the two vents that come up into the carb from the manifold ? They are pretty coated with crud.



Troy Cantrell
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Build thread - '66 CJ6 :
http://www.jeep-cj.com/forums/showthread.php?t=15075

 

[mstar]

Troy, the two holes in the manifold at the carb base are the heat-riser passages.they are usually plugged with carbon.If you have stock exhaust manifolds with the heat-riser valve on the passenger side that is working you could try to clear the passages at the carb.If not just leave them as is.When clean and working they bring warm exhaust up to carb base to prevent carb icing on cold starts.When I rebuilt my Dauntless Buick 225 V6 and had the manifold off I used a drill with 1/4" bit to clear the plugged solid passages.I still have stock exhaust manifolds with working heat -riser so it was worth the trouble.BTW do you have the fuel pump with the return line to tank to prevent vapor lock? I assume the brass filter inside the fuel inlet fitting has been replaced. those get missed sometimes. Mike

 

[tarry99]

I will do the crank test now that I got it home. The tank is new, old one was shot. Almost literally as j found live .22 ammo under and behind it when it came out. Some of the original fuel lines are still in use hard and soft, the soft were already mostly replaced and I changed the rest. That was the first time it broke down, cracked fuel line.

Pretty sure the cap vents as I have had a tank or so though it already.

Vent at the carb? Where / what does that look like? I will check the books for it too.


Troy Cantrell
Sent from my iPhone using Tapatalk
Build thread - '66 CJ6 :
1966 CJ 6 build - Jeep-CJ Forums

Troy.........the vent will be in the Carb. top cover and looks like a small piece of tubing maybe 1/4" diameter mounted vertical that normally is on the bowl side of the cover..........it vents the Carb.bowl so there is no vacuum created while running............. From the looks of that Carb. that should be totally disassembled and dipped in carb. cleaner.........blown out and re assembled. While you have it off I would disconnect your fuel line from the tank and blow it out also.........check the fuel cap for being vented & did you pull the fuel line off the carb and check the fuel pump pulse while turning the motor over?

 

[TroyaCantrell]

Troy, the two holes in the manifold at the carb base are the heat-riser passages.they are usually plugged with carbon.If you have stock exhaust manifolds with the heat-riser valve on the passenger side that is working you could try to clear the passages at the carb.If not just leave them as is.When clean and working they bring warm exhaust up to carb base to prevent carb icing on cold starts.When I rebuilt my Dauntless Buick 225 V6 and had the manifold off I used a drill with 1/4" bit to clear the plugged solid passages.I still have stock exhaust manifolds with working heat -riser so it was worth the trouble.BTW do you have the fuel pump with the return line to tank to prevent vapor lock? I assume the brass filter inside the fuel inlet fitting has been replaced. those get missed sometimes. Mike

Thanks Mike. The vents are gunked up but look to be open, all give them a bit of attention.

When I replaced the tank it didn't have a place for a return line so I removed it. It wasn't from the pump but from the filter. One in two out, and it went back to the tank.


Troy Cantrell
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Build thread - '66 CJ6 :
http://www.jeep-cj.com/forums/showthread.php?t=15075

 

[TroyaCantrell]

Troy.........the vent will be in the Carb. top cover and looks like a small piece of tubing maybe 1/4" diameter mounted vertical that normally is on the bowl side of the cover..........it vents the Carb.bowl so there is no vacuum created while running............. From the looks of that Carb. that should be totally disassembled and dipped in carb. cleaner.........blown out and re assembled. While you have it off I would disconnect your fuel line from the tank and blow it out also.........check the fuel cap for being vented & did you pull the fuel line off the carb and check the fuel pump pulse while turning the motor over?

I will check out the pump with the crank test while it is apart.

I did find that one screw hole that holds the top half on is stripped, the one that holds the choke mount.

Also found that the bottom flange on the carb base on the heat riser side in disfigured a bit. Not sure how big a deal that is.

Oh and I did check the brass filter and it looks clear but I will replace them both again to be safe.


Troy Cantrell
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Build thread - '66 CJ6 :
http://www.jeep-cj.com/forums/showthread.php?t=15075

 

[TroyaCantrell]

So I have a jetting question on this now, got it taken apart and it has .054 jets in it. I always thought it ran rich due to fuel smell in the exhaust but when I checked the plugs they all looked good and clean, no fouling at all.

Are the .054's too big? How do you determine the best jetting setup. We can go from sea level to 9,000 feet from weekend to weekend but I would say more time is spent at lower elevation.

I have seen a couple post about dropping done running .046 or so but they were on a different carb. This still has a Rochester G2.



Troy Cantrell
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Build thread - '66 CJ6 :
http://www.jeep-cj.com/forums/showthread.php?t=15075