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09-21-2006, 10:02 PM
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#1 |
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Firefighter
Join Date: Feb 2001
Location: Yellville, Ar, USA
Posts: 1,943
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adjusting a carb
I have a 2BBL that i think is out of adjustment, does anyone have any instructions on how to adjust one? It will run fine and if you gradually give it throttle it does just fine, but if you punch it, it will cut out and then pick back up, it's really bad if it is in gear and you are driving, it just has no power. Please help!!
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'72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA  
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09-21-2006, 11:11 PM
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#2 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: adjusting a carb
Need more info-what brand of carb-new-rebuilt-just start this all at once-tells all you can about it.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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09-22-2006, 01:56 PM
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#3 |
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Firefighter
Join Date: Feb 2001
Location: Yellville, Ar, USA
Posts: 1,943
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Re: adjusting a carb
Rochester rebuilt by Tomco hot air choke
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'72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA
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09-22-2006, 03:44 PM
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#4 |
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Registered User
Join Date: Jul 2005
Location: Kernersville, NC
Posts: 599
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Re: adjusting a carb
sounds like not enough timing to me. chris.
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its a work in progess. 71 c-10 lwb, in the middle of frame off restoration. 69 c-10 swb, drag truck, 406 sbc, balanced, comp 292 cam, ported, polished, gasket matched, and bowl blended pro comp 210cc heads, 2.02/1.60 ferrea valves,1.6 roller rockers, re curved hei with msd 6al box, 2-step rev limter, accel 300+ wires, ported victor jr intake, holley 750 double pumper carb, dynomax 1 5/8 headers, 4 spd munci m-20 with super case and iron midplate, mr. gasket vertigate shifter, 5.38 pro gears with full spool, 33 spline moser axles and c-clip elimators, line-loc, 5 gal fuel cell, holley blue pump.   7.807 @ 88.37mph 1.60 60FT 80 g-20 van, tow rig, cammed 305, th350, 10 bolt 88 jeep wrangler, dd, 258, ax-15 swap, 4.5" lift, 33x12.50's, lockers, 3.55's |
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09-22-2006, 05:14 PM
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#5 |
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I survived Dead Man's Curve.
Join Date: Apr 2006
Location: The Nine-Five-687
Posts: 389
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Re: adjusting a carb
Check your vacuum lines. If it's what I think it is (a back fire) maybe you should consider HEI ignition.
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"The people should not be afraid of their government. The government should be afraid of it's people." "The Hurricane" 1967 Chevrolet C10 350 Eight Cylinder, 700R4 BowtieOverdrive Cherry Bomb... Disturbing the Peace Since 1968. 
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09-22-2006, 06:18 PM
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#6 |
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Firefighter
Join Date: Feb 2001
Location: Yellville, Ar, USA
Posts: 1,943
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Re: adjusting a carb
vac lines new, distributor new, cap new, rotor new, HEI system already
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'72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA
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09-22-2006, 08:19 PM
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#7 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: adjusting a carb
1st thing to do is (WITH ENGINE OFF) look down into carb while you move the gas lever-there should be a stream of gas flowing out of pump holes as soon as you move the lever. If not the pump is bad or the pump lever is adjusted wrong or the rebuilders left a check ball out. If you are not getting a pump shot I would take it back and have them replace it.
__________________
56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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