My friend's buick Is spewing gas from the carb

"Denver Is Stuck In The 90s" (denver80222) 08/08/2014 at 15:01 • Filed to: None

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what's wrong, is it the fuel pump or the carberator

YSI-what can brown do for you > Denver Is Stuck In The 90s 08/08/2014 at 15:04

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did you check tire pressures?

twochevrons > Denver Is Stuck In The 90s 08/08/2014 at 15:05

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The fuel pump is doing its job. It's likely that the float valve on the carburettor isn't closing. Either the valve is stuck open, or the float has cracked and isn't floating any more.

It's also possible that the pump is producing too much pressure and preventing the float valve from closing. I'd check the valve and float first, though.

Denver Is Stuck In The 90s > YSI-what can brown do for you 08/08/2014 at 15:05

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what does that have to do with the carburetor?

Party-vi > Denver Is Stuck In The 90s 08/08/2014 at 15:06

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More than likely the carb. Is there a return fuel line on his Buick? Just curious. I'm not sure how a bad fuel pump could pump more fuel into the carb.

T5Killer > Denver Is Stuck In The 90s 08/08/2014 at 15:08

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Carb issue most likely the pump diaphragm if I remember my carb troubleshooting correctly.

Decay buys too many beaters > Denver Is Stuck In The 90s 08/08/2014 at 15:08

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Try unplugging it, waiting 10 seconds and then plug it back in.

Yowen - not necessarily not spaghetti and meatballs > Denver Is Stuck In The 90s 08/08/2014 at 15:09

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Fuel pressure is supplied from the tires.

#illshowmyselfout

Yowen - not necessarily not spaghetti and meatballs > YSI-what can brown do for you 08/08/2014 at 15:10

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...or maybe his pilot light went out, the eternal flame that burns off any excess fuel.

Denver Is Stuck In The 90s > Party-vi 08/08/2014 at 15:10

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could you give him authorship I know hammerhead fist punch said he wants him to contribute more but this is kind of an urgent matter and he would have posted this himself if he had authorship

Jcarr > Denver Is Stuck In The 90s 08/08/2014 at 15:12

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Ate something bad? Should go away in ~24hrs. Just make sure it has plenty of oil to stay hydrated. ;)

Denver Is Stuck In The 90s > twochevrons 08/08/2014 at 15:12

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would re building the carb work

Bandit > Denver Is Stuck In The 90s 08/08/2014 at 15:12

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Give me more info. Is it streaming all the time or only when trying to start? Does it run? Could it be timing.

Denver Is Stuck In The 90s > Bandit 08/08/2014 at 15:14

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all the time. We did replace the distributor but that was yesterday and this just showed up this morning

RamblinRover Luxury-Yacht > Denver Is Stuck In The 90s 08/08/2014 at 15:15

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Rebuilding the carb would likely help - most rebuild kits have new gaskets (possible culprit) and new float valve parts (other possible culprit).

twochevrons > Denver Is Stuck In The 90s 08/08/2014 at 15:16

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Probably would. Though, if it is running right otherwise, I wouldn't go so far as to recommend a full rebuild – a replacement float and/or cleaning the float valve would probably fix it.

twochevrons > RamblinRover Luxury-Yacht 08/08/2014 at 15:20

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Gaskets are a good point. I'm mostly used to SU H and HS carbs, where the float bowl gasket only serves to stop fuel sloshing out when cornering. Still, I'm always slightly hesitant to do a full needles-and-jets rebuild on an otherwise-OK carburettor – I'm of the "if it ain't broke, don't fix it" school of thought.

Bandit > Denver Is Stuck In The 90s 08/08/2014 at 15:23

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Hmm. My carb (qjet) spat fuel out the top but only when my timing was off. Sadly I'm not sure what the problem could be. Check the timing and check to make sure all your lines are good. Check the fuel pump by pulling the hose off before the carb and making sure is works as normal. That's all I've got. Sorry I can't help more.

Twingo Tamer - About to descend into project car hell. > Denver Is Stuck In The 90s 08/08/2014 at 15:31

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I agree with the guys saying float valve, that's what it was when my old scooter carb started spewing petrol.

crowmolly > Denver Is Stuck In The 90s 08/08/2014 at 15:32

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Make sure the floats are set correctly and the needle/seat valve is not sticking. And while you are at it check the air bleeds to make sure there's no crap in there.

What type of carb?

baracing > twochevrons 08/08/2014 at 15:34

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The needle might be stuck. But it most likely is an issue with float level. What kind of carb?

theo > Denver Is Stuck In The 90s 08/09/2014 at 17:32

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Sounds like a stuck float in the bowl, this will make it spray the same amount of fuel at idle as it should at wide open. Id replace the carb unless its newish, their a few hundred bucks and can make a night and day difference to the drivability. Also I'm disappointed at how little people know about carbs on here.

Denver Is Stuck In The 90s > theo 08/09/2014 at 17:34

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We figured it out: http://oppositelock.jalopnik.com/introduction-a…

He and I are gonna work on getting the plug back in on monday. It was spewing out the top because we didnt take the entire filter assembly off and the bottom bracket was covering the real issue