Starting old engine- Carb problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sixstring · 09-25-2010, 11:12 PM

So I got my engine that has been sitting for 12 years to crank over. I am having a problem with the carb, its spitting out gas. It seems like its letting the fuel come right through and not "regulating it." The carburator was in a bucket in the truck when I got it, it was pretty gunked up so I let it sit in the parts cleaner for a few hours if that helps any. The idle mix screws were un even as well. Any ideas? Thanks

**LockDoc** · 09-25-2010, 11:51 PM

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I'd say the float is stuck or the needle valve is stuck open. The carb probably needs rebuilt or replaced...

LockDoc

llowlife · 09-25-2010, 11:57 PM

+1 assume that its a Q Jet. Usually the needle gets gunked up and frozen in place. If its been 12 years the accel pump probably won't be too healthy either.

sixstring · 09-26-2010, 01:10 AM

Its a Rochester 2 barrel. I'm going to take the cover of the bowl tomorrow. Hopefully its a quik fix I need do a compression test. Thanks for the replies
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09-25-2010, 11:12 PM	#1
sixstring Registered User Join Date: Sep 2010 Location: Portland Oregon Posts: 45	Starting old engine- Carb problem So I got my engine that has been sitting for 12 years to crank over. I am having a problem with the carb, its spitting out gas. It seems like its letting the fuel come right through and not "regulating it." The carburator was in a bucket in the truck when I got it, it was pretty gunked up so I let it sit in the parts cleaner for a few hours if that helps any. The idle mix screws were un even as well. Any ideas? Thanks

09-25-2010, 11:51 PM	#2
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,645	Re: Starting old engine- Carb problem - I'd say the float is stuck or the needle valve is stuck open. The carb probably needs rebuilt or replaced... LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 09-25-2010 at 11:52 PM.

09-25-2010, 11:57 PM	#3
llowlife Registered User Join Date: Jan 2010 Location: Elgin Mn Posts: 112	Re: Starting old engine- Carb problem +1 assume that its a Q Jet. Usually the needle gets gunked up and frozen in place. If its been 12 years the accel pump probably won't be too healthy either. __________________ In the beginning of a change, the patriot is a scarce man, brave hated and scorned. When his cause succeeds however, the timid join him , for then it costs nothing to be a patriot. I am a revolutionary...so my son can be a farmer...so his son can be a poet. If there must be trouble, let it be in my day, so my child may have peace... 72 short step w/ 388 /4l80e/ and 3.08 gears.

09-26-2010, 01:10 AM	#4
sixstring Registered User Join Date: Sep 2010 Location: Portland Oregon Posts: 45	Re: Starting old engine- Carb problem Its a Rochester 2 barrel. I'm going to take the cover of the bowl tomorrow. Hopefully its a quik fix I need do a compression test. Thanks for the replies Posted via Mobile Device

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