No fuel in Carb Window?

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bsmith123

bsmith123

Joined
Oct 9, 2007
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Location
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I have my FJ running off a gas can at the moment and i ran out so I went out and filled the can and I seem to be having a prob now

The carb was just rebuilt by FJ40 JIM and the engine ran fine about 20 minutes before running out of gas


I have pressure in the line at the carb but the window is not filling up

I put a good ground on the solenoid wire and the hot wire is from the coil +


I can hear the solenoid click and feel the case click when I turn the key on

What the??

I had a little trouble once before but I put some gas in the carb and ran it and when I shut it off I could see the bowl fill and the float rise


Now no gas is coming in at all


the float is at the bottom of the bowl now

ideas?
 
If the float is at the bottom there's good chance your needle that the float pushs against it stuck closed. The solenoid has nothing to do with fuel getting to the bowl. Tap the top of the carb where the fuel line with a wood mallet and see if that doesn't unstick it. If it does you may be getting some junk from the fuel line in the carb.:cheers:
 
tap

I did tap around the top behind the fuel line and around the general area----do I need to open it up and have a look? the fuel line from the filter to the gas can is new but from the filter forward is old so maybe?
 
A little more info would help are you using fuel pump? Do you have gas under pressure at the carb? Crack the fitting in the fuel line to be sure before taking the top of the carb off. If you do then I guess you need to check the needle valve.
 
fuel to the carb

Yes I have pressure in the line at the carb---take the line loose and fuel is under pressure and sprays

the pump is OEM mech--- I didn't mention the type of pump because it is working okay

so it is poss that the float is at the bottom and a needle is stuck in the shut off position?

What is the function off the solenoid I thought that had to be on to allow fuel in ---just based on some post somewhere---didnt see the reason why when there is a float?
 
dirt dauber

Grant,

Funny you should mention that---That did turn out to be the prob on an aircraft pitot tube I worked on a while back--airspeed was jacked and the little buggers had crawled down the pitot tube!:lol:


I'll be checking the flow out of the line just to be sure it is not low even though I am getting pressure.

This is pretty straightforward I think since I can see exactly what is happening---I was hoping not to have to tear into the carb that was just rebuilt though:bang:
I'll know soon enough---the big prob is going to be the clutch --I have to get this ready to ship overseas when I move and time is getting near!
 
The first thing to do is pull one of the 14mm bowl drainplugs on the front of the carb, draining the gas out of the bowl. See how much is still in there, and if there is any silt flowing out.

Next try the quick way to unstick a stuck-up F inlet needle valve:
Remove 14mm plug on top of fuel inlet.
Poke straight down the middle w/ the blunt end of a 1/16" drill bit. that will push straight down on the needle, causing it to fall down on to the float as it should.

Reconnect fuel line and install top plug.
Crank engine and verify that gas comes out of bowl plug.

If yes, install bowl plug and crank it up.

If no, then remove top plug and crank engine, see if gas comes out of top plug.
If yes, then something is blocking needle.
If no, then diagnose fuel delivery to carb issue (pump, lines, filter...).
 
Thanks Jim

Thanks Jim,

I am pretty sure of the fuel deliv since it is spraying when I crack the line but I know you can build up pressure in a nearly clogged line so I will check flow too.

I was hoping there was a way to unstick it without disassembling the carb so that's just what I was hoping for

It seems to be running really sweet and accel sounds nice---just this little thing to sort out
 
Don't mean to hijack but I'm in the same situation.

I am getting fuel from the fuel pump and it does fill the bowl. The selenoid or fuel cut-off does seem to be opening..I can feel it click and move when it gets power. It will run when I pour gas down the carb (very nicely actually) but it will sputter out when it burns that up.

Will this needle valve trick work? I'm not the greatest with carbs.

Some history...the thing had been sitting for 5 years. I drained the fuel tank first, put on new fuel lines and filters. For some reason it is not spraying any fuel. I don't want to rip apart the carb...but do you think it is clogged jets or the needle valve.

Again it does pump fuel and I can watch the fuel bowl fill up 3/4 full in the window almost immediatly.
 
No, the needle valve is working, because the bowl has gas in it. The problem is getting the gas from the bowl into the throat of the carb.

If it sat for 5 years, the gas that was in the carb has turned to jello inside the small passages. It is probably a gunked up jet or emulsion tube. Time to strip & clean.
 
Thats what I was thinking. Is it possible to take the top cover off the carb and take out the jets and clean them along with some carb cleaner clean out the rest of the bowl and passages...just for a temporary fix. I'm shipping the car out of country and don't have a lot of time before it is leaving just a week hopefully. Just looking to get it running before I leave.
 
addicted56 said:
I'm shipping the car out of country and don't have a lot of time before it is leaving just a week hopefully. Just looking to get it running before I leave.
Click to expand...

I have a little more time but it seems we are in the same boat and the same business:)

I hope to have mine running again next w/e I am sure the carb fix will go all right and have another priority for now
 
I got mine running today. The embassy mechanic that I paid to basically use his tools sucked. Tried convincing me the fuel pump was no good for 20 minutes. Finally I just grabbed his tools and dove into the carb. It was so gunked there is no way anything was flowing. I still can't get the secondary to flow and the primary isn't perfect. But every jet, plunger, spring, float, you name it was caked or rusted. I cleaned it the best i could with some gas, some keyboard compressed air and a paperclip. It will start with it choked half way and runs fine after that. The accelerator pump isn't quite right though I do see it squirting fuel. I think the secondary is still completely clogged. I just couldn't get it to squirt out any fuel. Again everything was completely gunked shut so I'm happy I got it good enough to run for the first time in 5 years...a few seconds of smoking and everything was fine. Drove around ok too...just had to work with it to really accel.

I found a reputable mechanic that I'm going to drive it to and have it rebuilt.
 
running

Just a suggestion--If it is running good enough to ship it you could wait till you get there and send it to FJ40JIM. He desmogged mine and it runs great now
 
bsmith123 said:
Just a suggestion--If it is running good enough to ship it you could wait till you get there and send it to FJ40JIM. He desmogged mine and it runs great now
Click to expand...

Only difference is it will cost me around 30 bucks here including parts...you just can't beat that. I wish I had time to get it reparinted as well.
 
clearing the carb

Well today i got back to the point of starting her up again. Took the fuel line off and blew in the carb with some air and thought I saw a little junk. Blew on it and the needle was shutting it off for sure--no flow.

Sucked on it and a couple little rusty bits came out (YUK) and I felt the needle unseat and she fired right up and ran good! I guess it was worth the price of eating a couple chunks of rusty gas soaked bit:eek:


Well kind unsophisticated but it worked.

all new fuel line, filter and a new tank sitting in the garage---that's next on the agenda
 
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