1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

rebuilding the carb

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Old 12-31-05, 03:01 PM
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rebuilding the carb

ive recently been rebuilding the carb on my 81 gsl, and finally got it complete and put it back on the car. i turned the key to look at the gas levels in the windows and they were slap full. we adjusted the floats acorrding to the rebuild kit (5/8 i believe it was). any suggestions, thanks for any help.
Old 12-31-05, 03:07 PM
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Shoot thats not good. Is the throat of the carb filing with gas? Did you replace the needle and seat that came with the kit? Uh... it is possible that a piece of girt got into the needle and seat while you were reassembling it I suppose. Are both of the glasses full or just one? I would rule out a problem with the needles if they are both full. You may have excessive fuel pressure in that case. Is the fuel pump stock? If its aftermarket you'll need a pressure regulator. Otherwise the fuel pressure will force the needle and seat open and flood it.
Old 12-31-05, 03:14 PM
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all carbs r different, that is just a starting point for setting float level. also check the floats, they could be filling with fuel.
Old 12-31-05, 03:37 PM
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allright, ill check all these things. when you say its a starting point do you mean i need to just use trial and error till i get it where its half way. thanks for all your help.
Old 01-01-06, 01:18 PM
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it appears that the floats are filling up with gas. what do i do, where can i get new ones? i did replace all the needles. thanks
Old 01-01-06, 01:58 PM
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nevermind, it may not be the floats, but there is still a problem. we have the carb on the bench and its off to where you can see the bowls that the floats go in. we filled up the bowls with gas and its leaking. is it supposed to until it reaches a certain level or is there a problem. thanks for you help, i really want to get this thing back running before wed so i can have something to drive to school.
Old 01-01-06, 05:34 PM
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It should be halfway up the windows. Alot of times on new needles they dont seat right away. After its back together and on the car. Tap the top of the carb where the 2 inlet lines are (on the banjo bolts) with a mallet, hammer or screwdriver handle. Dont wail on it, just tap on it to shock the seats. That helps them seat sometimes. One other thing you can try since its apart again, is to put a little grease or oil on the needle tips (both ends) and on the axle that the float pivots on. Oh and brgins to mind a question. What tool did you use to adjust the floats? And check the surface that contacts the needle and make sure it is absolutely smooth. Any nicks, gouges or roughness can cause the floats to hang up. Very common mistake.
Old 01-01-06, 06:36 PM
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I always use a caliper to adjust the floats and never had a problem with my float adjustments on my Nikki carbs. Yeah I agree that a little all purpose grease on the needle tips help them seat properly.
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