Motorcraft 4350... AGAIN!!!
Thread Starter
|
Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
Motorcraft 4350... AGAIN!!!
How do I get rid of that hesitation? It almost backfires when I start out! I have to use some finesse to keep it from 'KAPOW!"
Rebuilt carb, factory specs, 172 jets, 3500+ feet above sea level, float @ 1 inch as per specs.
Mark
Ford started it; Ford will finish it!
Rebuilt carb, factory specs, 172 jets, 3500+ feet above sea level, float @ 1 inch as per specs.
Mark
Ford started it; Ford will finish it!
Senior User
Joined: Mar 2002
Posts: 141
Likes: 0
Motorcraft 4350... AGAIN!!!
I may be wrong, but I've never seen a 4350 without the rod conecting to the accelerator pump lever, I've had quit a few of them and I've work in a parts store for about 12 years. If yours doesnt have one, then thats probly why you have the hesitation. You have to have a working acc. pump, and every one I've ever seen is externally operated. Check out this link, its an exploded veiw (not very good) of a 4350, on the left near the top it shows the acc. pump lever and the rod/throttle link.
http://www.ifsja.org/tech/fuel/4350.shtml
http://www.ifsja.org/tech/fuel/4350.shtml
Thread Starter
|
Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
Motorcraft 4350... AGAIN!!!
That link is the exact picture that came with my carb kit. It doesn't have that link at all on the carb, and I don't see any place where it could bolt on. Has anyone heard of a carb like this???
I should have grabbed another one from the junk yard with those parts on it. There was a sale of all carbs for $6.99 each! There was a Lincoln there with the 4350, and the other parts were on that particular one also. My carb doesn't even have the throttle position solenoid, as shown in the pics... Sure makes driving more difficult!
Mark
Ford started it; Ford will finish it!
I should have grabbed another one from the junk yard with those parts on it. There was a sale of all carbs for $6.99 each! There was a Lincoln there with the 4350, and the other parts were on that particular one also. My carb doesn't even have the throttle position solenoid, as shown in the pics... Sure makes driving more difficult!
Mark
Ford started it; Ford will finish it!
Thread Starter
|
Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
Motorcraft 4350... AGAIN!!!
If you want, I could take a couple pictures of the 4350 for you to look at. I saw another just like it in a pickup without that hardware also.
Mark
Ford started it; Ford will finish it!
Mark
Ford started it; Ford will finish it!
Senior User
Joined: Mar 2002
Posts: 141
Likes: 0
Motorcraft 4350... AGAIN!!!
I checked your carb number, I think you are missing the linkage because it should have it. You might try getting it from a salvage yard or something, and it will fix your problem.
Trending Topics
Thread Starter
|
Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
Motorcraft 4350... AGAIN!!!
https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=5043&.jpg
I think I found it! Not used to seeing it there. My other carbs all have an arm and fulcrum right out front... This one with the plastic nut is to the side!
Anyway, someone confirm that for me from the pic?
Now, when looking into the carb throat while pulling throttle linkage, I see fuel coming from only one jet on the passenger side of the carb, not the driver's. I am pretty sure this is not normal???
I rebuilt the carb and blew it out with compressed air, but there must be something blocking that jet. How can I clear it out?
Could this be causing a temporary lean condition when I accelerate? Not enough fuel from the accel pump? Only going into one venturi instead of two??? And, to adjust for more fuel, do I just lengthen the pump stroke to get more fuel?
Mark
Ford started it; Ford will finish it!
I think I found it! Not used to seeing it there. My other carbs all have an arm and fulcrum right out front... This one with the plastic nut is to the side!
Anyway, someone confirm that for me from the pic?
Now, when looking into the carb throat while pulling throttle linkage, I see fuel coming from only one jet on the passenger side of the carb, not the driver's. I am pretty sure this is not normal???
I rebuilt the carb and blew it out with compressed air, but there must be something blocking that jet. How can I clear it out?
Could this be causing a temporary lean condition when I accelerate? Not enough fuel from the accel pump? Only going into one venturi instead of two??? And, to adjust for more fuel, do I just lengthen the pump stroke to get more fuel?
Mark
Ford started it; Ford will finish it!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic 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
Senior User
Joined: Mar 2002
Posts: 141
Likes: 0
Motorcraft 4350... AGAIN!!!
Thats the rod. You efinatly need to fix the carb so that it pumps gas out both sides, that will be your hesitation problem. As far adjusting the pump, if i remember correctly, you back off the nut for more fuel, if you play with it you'll get it right.
Thread Starter
|
Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
Motorcraft 4350... AGAIN!!!
Yessir, that is what I did... Backing off on the nut increases the pump stroke... It drastically improved the hesitation, thanks!
I only wonder about that other jet... I may just pull the carb and try to get a small wire inside the jet to clean it out. Do you think my new gaskets will squash enough again so I don't have to replace them?
Mark
Senior User
Joined: Mar 2002
Posts: 141
Likes: 0
Motorcraft 4350... AGAIN!!!
It depends on how long its been since you put a kit in it. I've been able to re-use them before as long as they dont tear. I would definatly fix it, with one jet you are only loading 4 cyclinders with fuel, so as rich as you are having to adjust it, you might have problems with fouled plugs on four holes.
Thread Starter
|
Cargo Master
Joined: Apr 2001
Posts: 2,364
Likes: 3
From: Eustis FL
Motorcraft 4350... AGAIN!!!
I have maybe 25 miles on the new carb kit... About two weeks old.
I think I will pull it this weekend to try to clean that jet out...
Mark
Ford started it; Ford will finish it!
I think I will pull it this weekend to try to clean that jet out...
Mark
Ford started it; Ford will finish it!
Thread
Thread Starter
Forum
Replies
Last Post
68_PoolvilleTX
1967 - 1972 F-100 & Larger F-Series Trucks
4
Sep 22, 2002 11:09 AM
trinogt
Fuel Injection, Carburetion & Fuel System
2
May 9, 2002 01:38 AM