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Engine Idles Only if Choke is Closed.

rodney25

Member
Joined
Nov 20, 2010
Messages
23
Location
New York
Corvette
1975 Convertable
Hello All,

I have a 1975 350 manual shift. Bought a 1604 Edelbrok carb and installed with pressure gauge and pressure valve. Fuel pressure set to 5.5 to 6 pounds. The problem is the engine stalls on idle. If you close the choke down the engine idles fine, but if the choke is open the engine stalls almost immediately. Timing set to 10 BTC. Spark plugs, wire, distributer cap, rotor, coil, fuel pump, filter all changed.

Does anyone have this problem or know what would cause this?
 

LLC5

Well-known member
Joined
Sep 28, 2004
Messages
2,299
Location
Wa.
Corvette
98 black 6spd convert.
Sounds like you have a vacuum leak somewhere. A propane bottle with a hose on it is the safest and easiest way to find it.
 

Tom Bryant

Well-known member
Administrator
Joined
Nov 9, 2000
Messages
7,322
Location
Edgerton, Ohio, United States
Corvette
1959 black 270hp (9/2/69) 1981 Beige L81(10/20/80)
Sounds that way to me too.

Tom
 

Hib Halverson

Technical Writer for Internet & Print Media
Joined
Jan 10, 2001
Messages
13,453
Location
CenCoast CA
Corvette
71 04 12 19
Vacuum leak is the most obvious.

Also could be a carb that is way out of adjustment for idle mixture or is defective.
 

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