Carb Problem
#1
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Car: 82 Sport coupe
Engine: 355 semi roller
Transmission: TH-350 B&M ratchet shifter
Axle/Gears: 3.73 Eaton Posi
Carb Problem
I have an edelbrock 600 carb. If i crank the motor too long and it doesn't start, fuel pressure builds up in the bowls and it squirts fuel long after i quit cranking. What is wrong?
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Car: 82 Sport coupe
Engine: 355 semi roller
Transmission: TH-350 B&M ratchet shifter
Axle/Gears: 3.73 Eaton Posi
Re: Carb Problem
mechanical fuel pump, filter, edelbrock 600 carb
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Car: 82 Sport coupe
Engine: 355 semi roller
Transmission: TH-350 B&M ratchet shifter
Axle/Gears: 3.73 Eaton Posi
Re: Carb Problem
it's coming out on top of the carb, everywhere. Why is my carb building this kind of pressure?
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The carb doesn't build fuel pressure. The fuel pump gets fuel to the carb via pressure, but the fuel in the carb should be at atmospheric pressure. If it's coming out of the carb, it's because it is overflowing, which 9 times out of 10 is a problem with the needle/seat float valve continuing to allow fuel into the carb when it should be shutting off the fuel flow. As stated, dirt in the needle/seat is a common culprit.
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Car: 2000 SS, M6
Engine: Modified LS1
Transmission: T-56
Axle/Gears: 3.42
Re: Carb Problem
The above is all true, but you may want to have a look at the fuel pump
pressure.
If the pressure at the needle/seat valve is more than about 9 PSI, the float
can be forced down and cause the needle to lift away from the seat.
Check that the fuel return line (if equipped) is not pinched.
pressure.
If the pressure at the needle/seat valve is more than about 9 PSI, the float
can be forced down and cause the needle to lift away from the seat.
Check that the fuel return line (if equipped) is not pinched.
#9
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Re: Carb Problem
BTW- Edlebrock's are notorious for not tolerating high fuel pressures. Most people say 5 PSI is about it before problems start. At 7 you're apparently just ASKING for trouble with them.
I don't use them much so I won't say I've got personal experience with it, but I've seen many people post problems similar to this over the years and my general take on things is they are more "touchy" about fuel pressure than other carbs- even QJets, which also can't take high fuel pressures.
I don't use them much so I won't say I've got personal experience with it, but I've seen many people post problems similar to this over the years and my general take on things is they are more "touchy" about fuel pressure than other carbs- even QJets, which also can't take high fuel pressures.
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Car: 2000 SS, M6
Engine: Modified LS1
Transmission: T-56
Axle/Gears: 3.42
Re: Carb Problem
pressure at idle. It's no wonder that most engine's I've tuned with Edelbrocks
have had rich idles.
#11
Re: Carb Problem
BTW- Edlebrock's are notorious for not tolerating high fuel pressures. Most people say 5 PSI is about it before problems start. At 7 you're apparently just ASKING for trouble with them.
I don't use them much so I won't say I've got personal experience with it, but I've seen many people post problems similar to this over the years and my general take on things is they are more "touchy" about fuel pressure than other carbs- even QJets, which also can't take high fuel pressures.
I don't use them much so I won't say I've got personal experience with it, but I've seen many people post problems similar to this over the years and my general take on things is they are more "touchy" about fuel pressure than other carbs- even QJets, which also can't take high fuel pressures.
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