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07-29-2010, 08:26 PM
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#1
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Join Date: Mar 2007
Location: clarksburg
Posts: 151
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rough idle, bogging down
for the past week the maro has been idling low at about 500 rpms and very rough. today i found that the screws that keeps the carb cover on the carb were loose and gas was leaking out so i tightened them. now when i go to accelerate the car bogs at around 1100-1400 rpms.
could the carb just need to be tuned or could it be timing or vacuum?
it is a 2 barrel Rochester. any ideas would be appreciated, thanks 
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07-29-2010, 10:32 PM
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#2
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Admin.
Join Date: Aug 2005
Location: Hamilton, NJ
Posts: 20,149
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"screws that keeps the carb cover on the carb"?
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07-30-2010, 10:50 AM
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#3
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Join Date: Jul 2008
Location: Columbia
Posts: 928
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Lots of screws on them there things. Have a pic?
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07-30-2010, 12:03 PM
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#4
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,213
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If the screws that hold the carb together were loose you probably lost a gasket as well. Any vacuum leaks will cause it to run poorly. You might want to pick up a rebuild kit for the carb and start from there.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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07-30-2010, 12:07 PM
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#5
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Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
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Quote:
Originally Posted by BonzoHansen
"screws that keeps the carb cover on the carb"?
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I thought the same?
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07-30-2010, 03:27 PM
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#6
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,213
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Rochester 1 and 2bbl carbs have screws that hold the top on, it's not like a Holley. I've rebuilt a few of them over the years, you just have to be careful and use the correct gaskets. Usually the rebuild kits have gaskets for multiple years so you need to look at your old one carefully. I've also flipped a gasket around by mistake and it won't run too well when that happens.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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08-01-2010, 08:29 PM
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#7
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Join Date: Mar 2007
Location: clarksburg
Posts: 151
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replaced all plugs, plug wires, distibutor rotor and tuned the carb and still hesitates. doesnt idle rough anymore though
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08-02-2010, 07:44 AM
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#8
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Hippy Mod, Bergermeister Meisterberger, Moderator
Join Date: Aug 2004
Location: Ewing
Posts: 6,213
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Check all your vacuum hoses to make sure none are cracked. The hesitation could be extra air getting in somewhere and throwing off the mixture before the pump shot. Did you check the float level to make sure it's set correctly?
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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08-05-2010, 08:35 PM
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#9
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Join Date: Mar 2007
Location: clarksburg
Posts: 151
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Quote:
Originally Posted by JL8Jeff
Check all your vacuum hoses to make sure none are cracked. The hesitation could be extra air getting in somewhere and throwing off the mixture before the pump shot. Did you check the float level to make sure it's set correctly?
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no, ill have to take a look
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