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#1 |
Active Member
![]() Join Date: Feb 2011
Location: ellicott city maryland
Posts: 151
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2 barrel rochester deal
Got a to barrel feeding my 350. idles fine and starts up good and all, but when I go to give it gas, it bogs down. Pops told me it was the accelerator pump. So when I go to replace this, should I remove the whole carb? Or take off the top half and replace it from there. Im just wondering whatever was easiest for one of you guys.
Thanks! |
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#2 |
1969 Custom 30 wrecker
Join Date: Sep 2001
Location: Pottsville, Pa
Posts: 2,611
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Re: 2 barrel rochester deal
For a quick fix like that, I usually just take the top part off. As long as your comfortable doing that (hanging over a fender) LOL then go for it.
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__________________
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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#3 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,915
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Re: 2 barrel rochester deal
It kind of depends. What's the overall condition of the carb? In my experience, by the time an accelerator pump needs attention, the whole carb could use at least some cleaning and gaskets.
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#4 |
Active Member
![]() Join Date: Feb 2011
Location: ellicott city maryland
Posts: 151
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Re: 2 barrel rochester deal
well i was gonna do what bob said and just replace the accelerator pump, but now my dads gonna take it and 2 other carbs to get rebuilt.
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#5 |
Active Member
![]() Join Date: Feb 2011
Location: ellicott city maryland
Posts: 151
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Re: 2 barrel rochester deal
bringing this thread back to life, I got the carb rebuilt, and its doing the same thing, if I were to mash the gas, it just wants to bog down, then fire up. would that be my timing thats off? what would I need to do to correct this bogging?
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#6 |
Registered User
Join Date: May 2008
Location: S.W. Chicago, IL.
Posts: 317
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Re: 2 barrel rochester deal
Check & inspect your fuel lines and fuel pump.
I have heard of instances where a rubber hose will collapse and restrict fuel supply. |
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#7 |
Registered User
Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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Re: 2 barrel rochester deal
Timing could be the issue.
__________________
1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
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#8 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: 2 barrel rochester deal
Need more info.
What year engine? How many miles on the engine? Have you replaced any ingnition parts like points, plugs, rotor, cap, etc? HEI or points distributor? When it bogs does it bog during normal acceleration or only on rapid acceleration? |
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#9 |
Active Member
![]() Join Date: Feb 2011
Location: ellicott city maryland
Posts: 151
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Re: 2 barrel rochester deal
I guess year would be a 72
87,653 miles or close to that Replaced plugs and plug wires points distributor And it seems too occur at both types accelerations, id have to come back on tonight and really make sure if it is both |
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#10 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,217
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Re: 2 barrel rochester deal
With the engine off, look down the throat of the carb & work the throttle linkage. You should see 2 squirts of gas going into the throat each time. If so the accel pump is working OK. If it is just a dribble your pump is still not working.
Try setting the timing up a little. It is possible the float level is low. The carb may have been changed at one time & the main jets are too small. |
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#11 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: 2 barrel rochester deal
Check the above and also make sure you are using manifold vacuum. The vacuum line below the throttle butterfly valves.
While you're at it, using mouth suction, see if the vacuum advance moves freely, the points are at around .019 at the high point of the cam and the distributor weights also move freely. |
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#12 |
Active Member
![]() Join Date: Feb 2011
Location: ellicott city maryland
Posts: 151
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Re: 2 barrel rochester deal
So that bog is a backfire up the carb. timing?
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