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07-28-2011, 12:44 PM
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#1 |
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Registered User
Join Date: Jun 2008
Location: Knoxville, TN
Posts: 4
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2GV carb flooding
I have a 1970 C20 with Rochester 2GV carb that is fllooding my motor out. It will start sometimes but when it does it won't rev up and just coughs and spits. I noticed fuel coming out all over the carb, let it evaporate and just cranked it a bit. Fuel first started coming out the butterfly shaft on both sides so I thought something is pouring gas all over them. A flashlight showed the venturi boosters dripping heavily down onto the throttle plates. They even did it when I just injected gas into the fuel line; that's with no cranking, so no pump pressure or engine vacuum to get fuel flowing normally. What is this probably caused by? Thanks
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07-28-2011, 12:47 PM
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#2 |
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Registered User
Join Date: Dec 2009
Location: Ste. Genevieve, MO
Posts: 526
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Re: 2GV carb flooding
Sounds like your float isnt shutting off the valve....has it always done this, or just started?
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07-28-2011, 04:38 PM
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#3 |
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Registered User
Join Date: Jun 2008
Location: Knoxville, TN
Posts: 4
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Re: 2GV carb flooding
Well I actually replaced that because those nitrophyl floats can get saturated over time and not 'float', but that didn't fix it. The needle and seat looked fine, too. It seemed to start doing this suddenly. One day it ran fine then a few days later... crap!
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07-29-2011, 06:44 AM
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#4 |
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1969 Custom 30 wrecker
Join Date: Sep 2001
Location: Pottsville, Pa
Posts: 2,611
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Re: 2GV carb flooding
Could be just the tiniest fleck of something got under the needle and is holding it open. It doesn't take much.
I'd check there first.
__________________
Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10 |
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07-29-2011, 01:26 PM
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#5 |
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Registered User
Join Date: Dec 2009
Location: Ste. Genevieve, MO
Posts: 526
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Re: 2GV carb flooding
Yea Id take that carb back apart and really inspect the float and needle.
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07-29-2011, 01:48 PM
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#6 |
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It's all in the timing
Join Date: May 2009
Location: Lake Mary,Florida
Posts: 600
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Re: 2GV carb flooding
Did you just replace the float or rebuild the entire carb?
__________________
The Dude Abides. ---------------------- I aint sayin, I'm just sayin. |
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07-29-2011, 03:17 PM
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#7 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,207
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Re: 2GV carb flooding
The only way for fuel to flood like that is it is getting by the needle & seat. Like the guys say you probably have a tiny particle of dirt in it. Make sure the float is set right & the fual pressure is not excessive.
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07-29-2011, 03:40 PM
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#8 |
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Who's got steelies?
 
Join Date: Feb 2006
Location: Morrison, Oklahoma
Posts: 1,026
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Re: 2GV carb flooding
Did you set the float level when you installed the new float?
__________________
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