Setting float level and running question
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From: Culpeper, Virginia
Setting float level and running question
I'm using my 79' while I chase a miss in the engine on the 96'.
I noticed it was running super rich, and realized I haven't ever checked the floats to see if they are close.
This is a 4150 4bbl on a 460.
I got the truck warmed up, then parked it level and turned it off.
Pulled the sight plug, and after the intial surge as the bowl emptied, it appeared high.
I could lightly bump the truck, the fuel would run out the sight plug hole, where I thought it should slightly trickle if it were just below the hole.
So I gave it the adjusting nut a tiny twist, tightened the screw, ran the motor, shut it off, pulled the sight plug, it appeared to hover just below the sight plug hole after it purged.
I did the same for the rear bowl.
I now notice when I drive and try to accelerate hard, or keep momentum up a hill, I get studder.
I'm thinking the bowls should be a touch higher.
Thoughts before I do this when I get the truck home today?
One of the gaskets seems weepy also, if I pull the bowl to fix the gasket, is their a baseline dry float level to be set?
Thanks
I noticed it was running super rich, and realized I haven't ever checked the floats to see if they are close.
This is a 4150 4bbl on a 460.
I got the truck warmed up, then parked it level and turned it off.
Pulled the sight plug, and after the intial surge as the bowl emptied, it appeared high.
I could lightly bump the truck, the fuel would run out the sight plug hole, where I thought it should slightly trickle if it were just below the hole.
So I gave it the adjusting nut a tiny twist, tightened the screw, ran the motor, shut it off, pulled the sight plug, it appeared to hover just below the sight plug hole after it purged.
I did the same for the rear bowl.
I now notice when I drive and try to accelerate hard, or keep momentum up a hill, I get studder.
I'm thinking the bowls should be a touch higher.
Thoughts before I do this when I get the truck home today?
One of the gaskets seems weepy also, if I pull the bowl to fix the gasket, is their a baseline dry float level to be set?
Thanks
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From: Culpeper, Virginia
Mmmm. Guess I missed that part in the book.
I had the motor running at one point and turned it off due to gas pouring out of the bowl.
Can I assume that the reason for the gas dumping out the sight plug was too high a float?
I had the motor running at one point and turned it off due to gas pouring out of the bowl.
Can I assume that the reason for the gas dumping out the sight plug was too high a float?
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From: Culpeper, Virginia
OK.
I at first thought it was a pressurization thing, but I know zip about carbs.
I just know she has run rich for ever, and needed to check the floats.
So I should be able to pull the sight plug, and start it without fuel dumping out if my floats are close eh?
We'll give her a shot.
I at first thought it was a pressurization thing, but I know zip about carbs.
I just know she has run rich for ever, and needed to check the floats.
So I should be able to pull the sight plug, and start it without fuel dumping out if my floats are close eh?
We'll give her a shot.
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From: Louisville,Ky.
Yep, open them up one at a time and start it up. Adjust the float down until it quits running out of the sight hole. I always adjust mine so that the level stays just below the site hole when running.Do the front one first, then the rear.
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From: Culpeper, Virginia
Was goofing with this last night.
Boy I tell ya, I had them adjusted way to high. I need to block the draft coming back off the fan, it's hard to tell exactly what it's doing.
I think I got the front bowl real close, but it started pouring as I was tinkering.
Finish it tonight.
Boy I tell ya, I had them adjusted way to high. I need to block the draft coming back off the fan, it's hard to tell exactly what it's doing.
I think I got the front bowl real close, but it started pouring as I was tinkering.
Finish it tonight.
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From: Culpeper, Virginia
Thanks.
I tinkered some more, and think I'm damn close.
It seems to stumble a bit off idle if I jam on it, but I don't normally drive it hard anyway.
If I drive it normal, seems to do just fine.
I blocked off the fan's draft and it made it much easier to see where the level was.
I have my idle mix screws at about 1 1/2 each side. I used a vac gauge and set it to the highest smoothest reading at idle.
I can't find my carb book anywhere, so I think this is vaguely right.
Thanks for the help.
I tinkered some more, and think I'm damn close.
It seems to stumble a bit off idle if I jam on it, but I don't normally drive it hard anyway.
If I drive it normal, seems to do just fine.
I blocked off the fan's draft and it made it much easier to see where the level was.
I have my idle mix screws at about 1 1/2 each side. I used a vac gauge and set it to the highest smoothest reading at idle.
I can't find my carb book anywhere, so I think this is vaguely right.
Thanks for the help.
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From: Louisville,Ky.
My 01 went to trade-in land. I can't stand having a newer vehicle that has been wrecked and repaired (someone backed into the driver side doors after Christmas and it had to be repaired) and my 77 found a new home in Indiana.
You can buy larger squirters (the piece where the gas sprays into the carb with a Phillips screw in the top of it) that will have a little larger holes in it. Your's will have a number stamped in it.
You can buy larger squirters (the piece where the gas sprays into the carb with a Phillips screw in the top of it) that will have a little larger holes in it. Your's will have a number stamped in it.