Another ole carb issue....
Thread Starter
Intermediate
Joined: Jun 2015
Posts: 39
Likes: 17
From: Earlysville va
Another ole carb issue....
just to give some specs first.I have a 76 Vette with,what I am told I'm is a350 bored to 355.block number states a 82-84 .never know what ya got after someone else has been in there.Getting there,it is a auto and has a 1406 elderbrock .
I has been having problems with stumbling at 1500-2000rpms.I am getting frt lt cylinder plug showing rich condition.Loads up after setting hot,changed pump to all positions and still seems to load up.Adjusted float.This is sure like beating a dead horse,but it is just aggravating.I took it out today on pump arm lower setting and it ran good on open road but initial start up it seems to be loading up and idling rough.I just want you guys thoughts on my next move....thanks
I has been having problems with stumbling at 1500-2000rpms.I am getting frt lt cylinder plug showing rich condition.Loads up after setting hot,changed pump to all positions and still seems to load up.Adjusted float.This is sure like beating a dead horse,but it is just aggravating.I took it out today on pump arm lower setting and it ran good on open road but initial start up it seems to be loading up and idling rough.I just want you guys thoughts on my next move....thanks
Le Mans Master
Joined: May 2007
Posts: 5,018
Likes: 1,118
From: North tonawanda NY
what happens when you adjust the idle mixtures scews in? does the engine react and stall when either screw is screwed in all the way? if not your not idling off the idle circuit anymore...
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
just to give some specs first.I have a 76 Vette with,what I am told I'm is a350 bored to 355.block number states a 82-84 .never know what ya got after someone else has been in there.Getting there,it is a auto and has a 1406 elderbrock .
I has been having problems with stumbling at 1500-2000rpms.I am getting frt lt cylinder plug showing rich condition.Loads up after setting hot,changed pump to all positions and still seems to load up.Adjusted float.This is sure like beating a dead horse,but it is just aggravating.I took it out today on pump arm lower setting and it ran good on open road but initial start up it seems to be loading up and idling rough.I just want you guys thoughts on my next move....thanks
I has been having problems with stumbling at 1500-2000rpms.I am getting frt lt cylinder plug showing rich condition.Loads up after setting hot,changed pump to all positions and still seems to load up.Adjusted float.This is sure like beating a dead horse,but it is just aggravating.I took it out today on pump arm lower setting and it ran good on open road but initial start up it seems to be loading up and idling rough.I just want you guys thoughts on my next move....thanks
You may not have a carburetor problem at all but rather timing and maybe fuel delivery problems. If the timing is correct and your pump is putting out 1-1/2 pints in 30 seconds then the next thing to look at is the mixture screw adjustments; typically 1-1/2 to 2 turns open from gently seated. Gees, it just started hailing; hail stones about 1" diameter. Odd because it was 90 degrees 2 hours ago.
Thread Starter
Intermediate
Joined: Jun 2015
Posts: 39
Likes: 17
From: Earlysville va
You may not have a carburetor problem at all but rather timing and maybe fuel delivery problems. If the timing is correct and your pump is putting out 1-1/2 pints in 30 seconds then the next thing to look at is the mixture screw adjustments; typically 1-1/2 to 2 turns open from gently seated. Gees, it just started hailing; hail stones about 1" diameter. Odd because it was 90 degrees 2 hours ago.
Thread Starter
Intermediate
Joined: Jun 2015
Posts: 39
Likes: 17
From: Earlysville va
I decided to move pump arm back to the middle position and went to church and it ran ok but had to readjust idle.Got home advanced the distributor a tad,I don't have a light yet, smoothed out bait and test drove.Car ran great but still a slight hesitation. gonna get a light next and dial it better. Pretty happy how it ran though,quick as crap..Still wondering if I need to add a fuel pressure regulator....
