351 HO carb
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Never had, or at least didn't notice I had, sooted-up air bleeds. But, that would would drive you crazy as I'll bet it would give weird metering problems. I do squirt brake cleaner through the air bleeds, as well as every other passage, when I rebuild a carb - now I know why!
Thread Starter
|
Junior User
Joined: Nov 2011
Posts: 68
Likes: 0
This is not as simple as I thought, of course. Can't get truck to crank. Acts like it wants to fire while cranking, but as soon as I lay off the starter it dies, again like its starving for fuel. Tried adjusting the primary float level up and down to get to crank, but to no avail.
There may be something else inside the carb that is stopped up. Truck had sat for a year before trying to fix. The primary fuel bowl and filter looked very clean to me, but may have thin film of deposits that could clog passages.
At this point it looks like a removal and full rebuild, which I was hoping to avoid due to the umpteen dozen vacuum hoses and linkages. Any thoughts on other things to check before the carb comes off?
There may be something else inside the carb that is stopped up. Truck had sat for a year before trying to fix. The primary fuel bowl and filter looked very clean to me, but may have thin film of deposits that could clog passages.
At this point it looks like a removal and full rebuild, which I was hoping to avoid due to the umpteen dozen vacuum hoses and linkages. Any thoughts on other things to check before the carb comes off?
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
Can you get it to run if you put a little gas down the carb?
Otherwise, I would check the red wire going to the ignition box.
When cranking, power is applied to the white wire in order to retard the ignition timing.
If the red wire does not have power when the ignition switch is in the run position you will have spark while cranking but it will die when you let off the key.
Otherwise, I would check the red wire going to the ignition box.
When cranking, power is applied to the white wire in order to retard the ignition timing.
If the red wire does not have power when the ignition switch is in the run position you will have spark while cranking but it will die when you let off the key.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
You'll have no bubbles in the emulsion tubes, PLUS, they act as a siphon break.
Without them fuel continues to flow out the boosters.
Ask me how I know......
Without them fuel continues to flow out the boosters.
Ask me how I know......
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
08 - Before you crank the engine after pouring the gas in the carb make sure you put the air cleaner back on. A backfire is likely and can be a disaster.
Jim - I remembered the bubbles, but had forgotten the siphon break bit. Both would be a problem, but the siphoning would be a big one. I've read all about it in the books, but never encountered it as a problem.
Jim - I remembered the bubbles, but had forgotten the siphon break bit. Both would be a problem, but the siphoning would be a big one. I've read all about it in the books, but never encountered it as a problem.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Junior User
Joined: Aug 2008
Posts: 88
Likes: 1
From: Connecticut
I had host of issues with the carb on my 86 F-350. Even after a "proffesional" rebuild the carb still acted up. I finally replaced the carb with a refurbed one from Carburators and more out of Texas.
Carburetors and More
He has the carb you most likely need and his prices are great. I put the carb he sent on the truck and it runs like a top. Plus he'll accept your old carb as a core.
Carburetors and More
He has the carb you most likely need and his prices are great. I put the carb he sent on the truck and it runs like a top. Plus he'll accept your old carb as a core.
Thread Starter
|
Junior User
Joined: Nov 2011
Posts: 68
Likes: 0
Beetle; If I were keeping the truck I would put an inline filter on. But I'm just trying to get it running well enough to sell. Can't afford insurance on more than one truck. But I will miss it when it's gone.
Truck is not ratty at all. Inside of bed is rusty with a crease in the pass side put there by my sister. Top of roof is rusty, but inside is really clean, and truck is tight with few rattles.
Anyone have an opinion as to an asking price if running decent? Standard cab, long bed, exc working 4WD w/locking hubs, 135k original miles. My dad bought this for emergencies when they moved to NC mnts. My Mon went to town one day (below zero temps) and the oil wasn't moving in the engine. Yes, rebuild time. Rebuilt at about 80k. I have been using as a yard truck with occasional towing duties.
Truck is not ratty at all. Inside of bed is rusty with a crease in the pass side put there by my sister. Top of roof is rusty, but inside is really clean, and truck is tight with few rattles.
Anyone have an opinion as to an asking price if running decent? Standard cab, long bed, exc working 4WD w/locking hubs, 135k original miles. My dad bought this for emergencies when they moved to NC mnts. My Mon went to town one day (below zero temps) and the oil wasn't moving in the engine. Yes, rebuild time. Rebuilt at about 80k. I have been using as a yard truck with occasional towing duties.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
Wow Beetle,
Even with the heat shield wouldn't a plastic filter like that Fram G-2 be safer up on top of the intake manifold than sitting under the exhaust manifold?
There's a reason manufacturers use rigid metal lines in those sort of locations.
FWIW, I run a large metal cased fuel filter that points right up at the fuel inlet.
It's for a 2000 Nissan Altima, Fram G5247.
Even with the heat shield wouldn't a plastic filter like that Fram G-2 be safer up on top of the intake manifold than sitting under the exhaust manifold?
There's a reason manufacturers use rigid metal lines in those sort of locations.
FWIW, I run a large metal cased fuel filter that points right up at the fuel inlet.
It's for a 2000 Nissan Altima, Fram G5247.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
Surveyor,
Did you get it to run on some fuel down the carb?
So, you know you have spark in the run position?
The only thing you can really damage in the front metering block is the PowerValve.
Did you get it to run on some fuel down the carb?
So, you know you have spark in the run position?
The only thing you can really damage in the front metering block is the PowerValve.
Thread Starter
|
Junior User
Joined: Nov 2011
Posts: 68
Likes: 0
Jim;
Tried fuel in the carb after replacing valve and filter to prime. Same result as before. Will check spark today. Will also blow air thru front of carb. Have to wait on buddy Mon to check if getting enough gas down carb throat.
There is a small dia tube that sticks up above primay venturi. When I raised the float high gas started flowing out, so lowered float some. Is this an overflow tube?
Tried fuel in the carb after replacing valve and filter to prime. Same result as before. Will check spark today. Will also blow air thru front of carb. Have to wait on buddy Mon to check if getting enough gas down carb throat.
There is a small dia tube that sticks up above primay venturi. When I raised the float high gas started flowing out, so lowered float some. Is this an overflow tube?