hey guys need a little input. not too long ago i installed a new summit brand carb on my 383 stroker. it ran great. never had a issue. shortly after i took the car to a body shop to get the front end touched up after a little boo boo and when i got it back it runs like garbage. it starts fine, but if i let it run with the fast idle for maybe a minute or two and kick it down, it stumbles unless i give it a little gas and when i put it in gear, it wants to stall. sometimes it does depending how long i let it warm up. could something have gotten into the carb when it was at the body shop? i asked the painter if he had maybe accidently bumped something under the hood and he assured me he didnt and i trust him because he is a friend of mine. could maybe the needle and seat have dirt or some sort of debris stuck in it? i thought maybe it was the carb gasket, i replaced that and it still does the same thing. any input will be greatly appreciated. thanks fellow car buffs!
summit brand carb
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In a word, yes. I am not familiar with these carbs, they are based on a discontinued Holley design. I suspect they have air bleeds, and othe features that could become contaminated. I suggest disassembly, cleaning, and reassembly. I hope you're successful insolvent this.
PatM
PatM
thats what i thought too. i mean its the only reasonable explanation right?
Well I will be taking it apart tonight after work and hopefully once I clean it and put it back together it'll run like it did. I'll let you guys know how it works once I do. Thanks for the insight guys. I've never taken apart one of these carbs before so wish me luck! Lol!!
thanks for the tip man. i will do that. too bad brake clean isnt a good solvent to use because i have enough of that i supply summit racing haha
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Carburetor cleaner
Check out this carb. cleaner. You dip all the parts. My cousin used it the soak his motorcycle carburetors. He said it worked great. Berryman Chem-Dip Carburetor and Parts Cleaner: Automotive : Walmart.com
Check out this carb. cleaner. You dip all the parts. My cousin used it the soak his motorcycle carburetors. He said it worked great. Berryman Chem-Dip Carburetor and Parts Cleaner: Automotive : Walmart.com
Brake cleaner may be adequate, depends on what is clogging up the carb.
The Berryman's was recommended to me as well, it cleans some stuff okay but I have never found it to be great at cleaning anything.
Well I took it all apart and cleaned it. I mean really cleaned it, I think. And I put it back together and it still runs like poop. Not as bad but still poop. Maybe I didn't clean it enough? Of maybe there's something else wrong. I dunno. The engine is on craigslist right now. In tired of this engine. It's given me nothing but problems since the first time I started it. So I got me a LS 6.0 liter sitting in my garage from a truck. That bad boy will be going in next 
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67 Posts
did you call the people at summit? sometimes they are pretty helpful(sometimes not) but I have the same (street/strip racing 600 cfm carb?) on my Ford 302- I had problems with the air/fuel mixture needles-adjustment- at first- they were a little touchy- but I am interested in knowing why yours went bad all by itself- not very comforting- its a brand new carb after all- well good luck-
Well last night I cleaned that SOB really good and it was still running bad but it got a little better. So just for giggles I checked the timing. Because I had a feeling there was no way this carb was junk. And sure enough, the timing was WAY off! Why it was off I have no idea. Maybe my painter lied to me? I don't know. But it runs 200% better now.
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some times strange things happen at "The Shop"- every time I have to leave mine- something is messed up when I get it back- it sucks- I guess thats why I have such a crappy paint job- I did it in the front yard hahahaha- but at least nothing happened on that job hahahaha
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