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Old 10-02-2014, 4:23pm   #1
Montehall
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Default ok... Quadrajet guys, question

I figure I've got a fuel leak... somewhere.

any ideas?

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Old 10-02-2014, 4:26pm   #2
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Does it run right?

If it does, dont Fuch with it...
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Old 10-02-2014, 4:30pm   #3
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yeah... it runs fine

but it's ucky looking
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Old 10-02-2014, 4:31pm   #4
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Spray it down with carb cleaner. Clean it up as much as possible. Then drive it. The fuel leak should become apparent.

But, if you're impatient, grab yourself a carb rebuild kit for your specific carburetor, then spend the weekend rebuilding it.

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Old 10-02-2014, 4:36pm   #5
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Quote:
Originally Posted by RED-85-Z51 View Post
Does it run right?

If it does, dont Fuch with it...
Seriously? You would be ok with your engine looking like that?



Oh. And what Snide said.
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Old 10-02-2014, 4:43pm   #6
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go around and tighten all the screws in the body that hold it together, spray it with carb cleaner or throntle body cleaner and watch it to see where it's leaking from. Could be the big inlet fitting.....see if it's tight, and install a new filter and gasket in it while you're at it. .
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Old 10-02-2014, 4:51pm   #7
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Quote:
Originally Posted by RedLS1GTO View Post
Seriously? You would be ok with your engine looking like that?



Oh. And what Snide said.
Nah, id have long ago tossed the leaky erratic qjet in favor of a aquare bore edelbrock or Holley setup. Ive had 3 qjets...my experience is, if by some stroke of luck they actually work right...its best not to go dicking around with them. They are sensitive to the screws being even slightly over tightened, ive got the big all inclusive book of qjets in my library...
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Old 10-02-2014, 4:53pm   #8
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Its also possible you are getting fuel vapor spitting back out the carb..what air filter are you running, what housing.
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Old 10-02-2014, 4:55pm   #9
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I bet you take the top off that thing, while on the car even, and you will find the floats are made of brown plastic crap....they called Niteirlle or some such spelling, they not for shit, as they absorb fuel over time and will not turn off the fuel feed properly.....the condition gets more and more marginal and finally it starts pissing fuel outside especially when stopped....soaking through the gaskets.... I dunno if it's possible to find any brass floats like were made for SOME Qj's over the years....the brass floats never failed....

most smog carbs were calibrated to run SO lean at idle, so it's not a surprise it feels/seems ok ......

Good luck on finding floats.....
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Old 10-02-2014, 6:04pm   #10
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Monte, if you can get ahold of Lars Grismund (he regularly posts at the other place and various other Vette forums) I bet he would be willing to help you. The guy is a carb wizard and has forgotten more than most people know about Q-Jets.

I can dig around for his email if you want...
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Old 10-02-2014, 6:04pm   #11
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It's probably leaking around the fuel filter fitting. I think there's supposed to be a gasket in there.
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Old 10-02-2014, 6:05pm   #12
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Quote:
Originally Posted by chinaski View Post
Monte, if you can get ahold of Lars Grismund (he regularly posts at the other place and various other Vette forums) I bet he would be willing to help you. The guy is a carb wizard and has forgotten more than most people know about Q-Jets.

I can dig around for his email if you want...
[email protected]
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Old 10-02-2014, 6:38pm   #13
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You could have it off the car, cleaned, rebuilt, and back on the car in a couple hrs. tops. If the car has run hot. Parts of it could be warped. Most likely, bad gaskets, gum build up, etc...there is a filter and gasket where the fuel line connects. It should at least be checked and cleaned.
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