Sudden Engine Problem - 351w
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Right, but "new" doesn't mean "setup" or "adjusted"... Carbs are not plug and play, they will work, but float height can come back to bite ya.
Even if the float height is set "in the ballpark" or bench setting the fuel height is what counts. That's why I suggested starting from scratch. Don't take anything for granted when troubleshooting.
Did you replace fuel pump recently? Fuel filter? The whole carburetor and engine running right is predicated on the fuel pressure and volume being within limits. If it's out of spec, or erratic it will be a source of constant sorrow.
Even if the float height is set "in the ballpark" or bench setting the fuel height is what counts. That's why I suggested starting from scratch. Don't take anything for granted when troubleshooting.
Did you replace fuel pump recently? Fuel filter? The whole carburetor and engine running right is predicated on the fuel pressure and volume being within limits. If it's out of spec, or erratic it will be a source of constant sorrow.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Yes but again what I'm getting at "Plenty of fuel" may really be "way too much".
With troubleshooting, like many things, slow is fast. Don't guess, measure.
Don't take anything for granted, especially these days when new parts are often defective. Not trying to beat up on you, just point out what happens when we "assume" that, because a component is new, that it is serviceable.
The "remanufactured" carburetor I bought a couple years ago cost over $200 and arrived with jets sized for altitude of 15,000 feet. I live in Iowa. The float level looked OK but the actual fuel level in the bowl was close to flooding.
Be sure to have a fire extinguisher handy in the truck at all times by the way.
With troubleshooting, like many things, slow is fast. Don't guess, measure.
Don't take anything for granted, especially these days when new parts are often defective. Not trying to beat up on you, just point out what happens when we "assume" that, because a component is new, that it is serviceable.
The "remanufactured" carburetor I bought a couple years ago cost over $200 and arrived with jets sized for altitude of 15,000 feet. I live in Iowa. The float level looked OK but the actual fuel level in the bowl was close to flooding.
Be sure to have a fire extinguisher handy in the truck at all times by the way.
Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
Did you remove the site plugs from the front of the fuel bowls while it was running? That will tell you a lot.
As for the floats, they're generally pretty simple, and make a big difference in operation if they're not set right.
Remove the fuel bowls and hold them upside down. The line on the float should be parallel with the bottom of the fuel bowl. Use the nut/screw on the needle/seat to raise or lower them accordingly.
As for the floats, they're generally pretty simple, and make a big difference in operation if they're not set right.
Remove the fuel bowls and hold them upside down. The line on the float should be parallel with the bottom of the fuel bowl. Use the nut/screw on the needle/seat to raise or lower them accordingly.
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Junior User
Joined: Jun 2007
Posts: 67
Likes: 0
The garage replaced the plugs as they had gotten all fouled, they told me to go buy a edlebrock carb. and bring it to them, the holley was not working.
But then, in the end, they had to replace the control module.
Runs better then ever now though, for sure. Thanks for all input. This forum is great!
But then, in the end, they had to replace the control module.
Runs better then ever now though, for sure. Thanks for all input. This forum is great!
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