Dirty Carb?
Thread Starter
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Mountain Pass
Joined: Feb 2006
Posts: 174
Likes: 1
Dirty Carb?
I am getting fuel to carb but not to the engine. when i pour fuel down the carb it runs. there is fuel pumping to the carb. i think its just gummed up right. This one has not been ran for a long time. I will try a lot of carb cleaner. Any suggestions? Before i rebuild. what are my options? i am hoping to just get it going with no effort. If i have to remove it can i soak it in something? what is the best product to clean it. Gumout?
Thanks Dudes!
Thanks Dudes!
Postmaster
Joined: Apr 2000
Posts: 2,838
Likes: 6
From: SD
Does it have a screw in fuel filter where the fuel line attaches to carb? That may be plugged. If the carb is plugged from sitting, the best option is a carb soak. Most parts stores sell it by the gallon. Or you could have a local repair shop soak it for you. Take it all apart and soak the metal parts, it will eat up the plastic or rubber parts. Canned carb cleaner will work, but soaking is better.
Marty
Marty
Senior User
Joined: Feb 2006
Posts: 113
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I'm a fan of B-12 Chemtool. I use it as a routine injector cleaner in all my vehicles and my lawn mower. You can get it just about anywhere. I believe they package it in a gallon version, too.
Good luck.
Honorable
Good luck.
Honorable
Thread Starter
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Mountain Pass
Joined: Feb 2006
Posts: 174
Likes: 1
this is just a gas saver i am buying for $300 its a 4 cyl 87 sentra. this was trappped in someones basement. when they put up a colum they could not get it out. the car is in showroom condition. i need it to get around when i cant afford my trucks. it has a new fuel filter. fuel pump works and it runs smooth when i add the gas trough the carb. the guy was telling me a new carb costs $400. i figure i can just spry it a bunch to free it up. i need to drive it home.
Postmaster
Joined: Jul 2005
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It could be the float is stuck,
Should have a small window on carburator and you can visually check if the carb has fuel.
Excessive use of B-12 carb cleaner can damage any part which is not made of metal.
If you do a carb rebuild, make sure not to over soak the carburator. A soak of 2 hours should be sufficient. Rinse the carb parts with water after you have soaked the carb in the vat.
here a link http://www.autozone.com/servlet/UiBr...3d8013270d.jsp
- - - - - buck - - - - -
Should have a small window on carburator and you can visually check if the carb has fuel.
Excessive use of B-12 carb cleaner can damage any part which is not made of metal.
If you do a carb rebuild, make sure not to over soak the carburator. A soak of 2 hours should be sufficient. Rinse the carb parts with water after you have soaked the carb in the vat.
here a link http://www.autozone.com/servlet/UiBr...3d8013270d.jsp
- - - - - buck - - - - -
Thread Starter
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Mountain Pass
Joined: Feb 2006
Posts: 174
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Post Fiend
Joined: Jul 2003
Posts: 11,945
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From: Spokane, WA
Off topic but wear goggles when you play with that stuff. I had the misfortune of having a bit of B12 splash in my eyes some time back . . . not a good thing. But it does work well for freeing the gunk.
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Thread Starter
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Mountain Pass
Joined: Feb 2006
Posts: 174
Likes: 1
yeah its funny as hell!
well i did mess with it today had it run for 20 minutes on gumout. they were out of b12. there is fuel in the window. and still is pumping fuel. so i will just try again and if not, then trailer it home and soak it. those carbs have like a million hoses though. and the bolts are underneath. its like doing a engine swap. i was thinking of designing a bladder with something to the inlet and trying to flush it. kinda of like one of those blood pressure things. but this thing is cherry. the tires still have the hairs.
well i did mess with it today had it run for 20 minutes on gumout. they were out of b12. there is fuel in the window. and still is pumping fuel. so i will just try again and if not, then trailer it home and soak it. those carbs have like a million hoses though. and the bolts are underneath. its like doing a engine swap. i was thinking of designing a bladder with something to the inlet and trying to flush it. kinda of like one of those blood pressure things. but this thing is cherry. the tires still have the hairs.
Postmaster
Joined: Jul 2005
Posts: 3,248
Likes: 0
Make sure the tires are not dry rotted (cracked).
Fuel in the window is a good sign. With the air cleaner off, looking down the carb body, press down on the accelerator and observe if the accelerator pump is squirting gas.
Go figure, bad gas in the gas tank will also make the car not run. If the gas smell like turpentine then the gas tank will need to be dropped and flush out the old gas. Replace with some premium gasoline, and the Nissan should be good to go.
If you decide to pull out carb. Mark with numbers all the vacuum hose with tape and emission hoses. Draw a picture, it will help on the installation of the rebuilt carb. If you have a digital camera, take some pictures. One hose hooked up wrong will make the engine run screwy.
- - - - - buck - - - - -
"Patience is a virtue, and so is wisdom"
Fuel in the window is a good sign. With the air cleaner off, looking down the carb body, press down on the accelerator and observe if the accelerator pump is squirting gas.
Go figure, bad gas in the gas tank will also make the car not run. If the gas smell like turpentine then the gas tank will need to be dropped and flush out the old gas. Replace with some premium gasoline, and the Nissan should be good to go.
If you decide to pull out carb. Mark with numbers all the vacuum hose with tape and emission hoses. Draw a picture, it will help on the installation of the rebuilt carb. If you have a digital camera, take some pictures. One hose hooked up wrong will make the engine run screwy.
- - - - - buck - - - - -
"Patience is a virtue, and so is wisdom"
Thread Starter
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Mountain Pass
Joined: Feb 2006
Posts: 174
Likes: 1
i need a light but i did not seem to pump gas down the body. but the pessure was going into it. i am pretty sure theres a clog inside the carb. the tank was on E. the guy put in a few new gallons for me. the tires dont seem dry rotted they were inside. the car was on blocks so there was no pressure on them. they do look dry though but no cracks. i know they are not as good as new. but they are good for now. ill use them up.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Some or all of those vacuum hoses may have cracks in them also. Pull them off and if you find any with cracks either inside or outside replace them ALL. The job is not to bad if you buy several rolls of hose and just replace one at a time. Just one crack can make a tiny vacuum leak that will make cars of that vintage run like hell. You do not want to be tracking down a new vacuum leak every week... 
