carb warm up? stall?

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Jan 12, 2013 | 11:47 PM
  #1  
hey guys, my camaro is my first carb. I bought it recently with a holley 650 in it, she's a nice engine. Well it's roughly 25 degrees where I am and it seems like if i pass roughly 2500 rpm and the car hasnt been running 10 minutes or so she shuts right off. Is that normal?? i'm used to fuel injection where I can just get up and go.

she does need a tune, thats pretty obvious. But, i'm just stumped. I tried to merge into traffic before I warmed her up and she cut right out. 82 z28 with a 350 swapped in guys. thanks
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Jan 13, 2013 | 08:16 AM
  #2  
Re: carb warm up? stall?
Do you have a functional choke system on the carb? It's purpose is to richen the mixture when the engine is cold. Without it starting and running in cold weather can be a pretty miserable experieince until things warm up.
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Jan 13, 2013 | 11:38 AM
  #3  
Re: carb warm up? stall?
Quote: Do you have a functional choke system on the carb? It's purpose is to richen the mixture when the engine is cold. Without it starting and running in cold weather can be a pretty miserable experieince until things warm up.
I believe its supposed to have an electric choke but it seems like there isn't one at all. that would explain it but i didn't think it could affect it that much
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Jan 13, 2013 | 11:59 AM
  #4  
Re: carb warm up? stall?
Quote: Do you have a functional choke system on the carb? It's purpose is to richen the mixture when the engine is cold. Without it starting and running in cold weather can be a pretty miserable experieince until things warm up.


funny enough damon im from philly but im out in the mountains near pitt right now
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Jan 13, 2013 | 08:54 PM
  #5  
Re: carb warm up? stall?
I have a similar problem. My qjet will start right up in the morning (15 degrees) but I need to hold it at at least 1000 rpm or it will die. Let off the gas and it shakes and bucks like crazy. I have to back down the driveway holding it at 1k and a foot on the break. But once I get the car into second gear it drives normal and the problems are gone. No idea what's causing it
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Jan 13, 2013 | 09:13 PM
  #6  
Re: carb warm up? stall?
Quote: I have a similar problem. My qjet will start right up in the morning (15 degrees) but I need to hold it at at least 1000 rpm or it will die. Let off the gas and it shakes and bucks like crazy. I have to back down the driveway holding it at 1k and a foot on the break. But once I get the car into second gear it drives normal and the problems are gone. No idea what's causing it
i was told it could be the pcv valve, here's hoping. simple thing can cause so much hell.
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Jan 16, 2013 | 05:09 PM
  #7  
Re: carb warm up? stall?
mine, when cold, dies as soon as i put it in drive if i use manifold vacuum on vacuum advance, no way i can get a 14:1 AFR at idle on manifold vacuum without it stalling as soon as i put it in drive after warming up for a minute or two but on ported vacuum idles great in drive even at 15:1
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Jan 16, 2013 | 06:10 PM
  #8  
Re: carb warm up? stall?
Quote: mine, when cold, dies as soon as i put it in drive if i use manifold vacuum on vacuum advance, no way i can get a 14:1 AFR at idle on manifold vacuum without it stalling as soon as i put it in drive after warming up for a minute or two but on ported vacuum idles great in drive even at 15:1
well mine still dies if cold, I think its a choke issue. I was looking at my carb and the electric connector clip looks broken off labeled choke.
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Jan 17, 2013 | 07:59 PM
  #9  
Re: carb warm up? stall?
If you don't have 12 volts wired to the choke then there's your problem. Get your choke working properly and you'll be good to go.
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