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03-21-2013, 10:30 PM
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#1 |
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Registered User
Join Date: Jan 2008
Location: san bernardino
Posts: 4
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Carburetor trouble
I have a 1970 Chevy C10 p/u with a 2 wheel drive, 350 engine w/quadrojet carburetor. I am having trouble adjusting the carburetor. Can anyone help?
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03-21-2013, 10:48 PM
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#2 |
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Registered User
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,982
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Re: Carburetor trouble
Can you be more specific? What kind of problems are you having?
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03-21-2013, 11:00 PM
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#3 |
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Registered User
Join Date: Jan 2008
Location: san bernardino
Posts: 4
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Re: Carburetor trouble
popping in the carburetor on acceleration
Last edited by djfugate; 03-21-2013 at 11:24 PM. |
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03-25-2013, 06:33 PM
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#4 |
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Registered User
 Join Date: Nov 2006
Location: Virginia's Eastern Shore
Posts: 91
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Re: Carburetor trouble
Do you know the carb's history, that is, do you know if it is all original, or replacement? Does it have the original greenish goldish finish, or has it been blasted? Does it have a remanufacturer's sticker on it?
If it is all original you are ahead of the game. The QJ is a very application specific, complicated critter, and you really have to know your stuff to competently troubleshoot/repair them. They've gotten a bad rep in the past due to things done to them that shouldn't have been, even by those that supposedly were knowledgeable pros. What is the number on the carb? (It reads vertically about the middle of the drivers side secondary.) If your carb is original I'd stick with it if I were you. If you do I highly recommend getting at least one good book on the subject. The one by Cliff Ruggles would be a good start. Sounds to me like you might have lean misfire. It's always a good idea to make sure your ignition system is right before you start playing with the carb. |
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03-25-2013, 07:44 PM
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#5 |
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Proprietor of Dale's Corner
Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,245
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Re: Carburetor trouble
Or a floating exhaust valve
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man R.I.P. FleetsidePaul |
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03-25-2013, 07:49 PM
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#6 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
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Re: Carburetor trouble
Could also be timing. Make sure your timing is nailed down before troubleshooting a carb.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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03-25-2013, 08:24 PM
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#7 |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Carburetor trouble
Good advice by all above.
Study as much as you can on it before digging into it and giving it a good cleaning and installing a kit in it. There's a lot of good reading on the net and even on youtube. But, first check all the easy stuff starting with exhaust leaks and vacuum leaks. Check around the base mounting gasket for leaks. Ignition timing and ignition components as mentioned above are also an easy check. If plugs or points are bad you may get popping or misfiring in the exhaust. Other things that can get a little more difficult are bad valves and on high mileage small blocks of the early era, is a worn camshaft.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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03-25-2013, 11:34 PM
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#8 |
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Registered User
Join Date: Sep 2011
Location: New Melle, MO
Posts: 104
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Re: Carburetor trouble
Ignition timing or weak ignition system can share these symptoms. Try checking the timing, and a good tune up never hurts.
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