Ford 3400 running poorly

[Craig 59 641]

Repairing a ford 3400 for a friend. Was running poorly. Wouldn t rev up. Another person replaced the stock Holley carb with ?? Not sure of. Had a gas leak they thought it was carb. So replaced it. Still had a leak. Called me into help. Found leak in fuel pump. Replaced it. Ran better. But had a skip in idling. Ck points. They were worn down gap off. Bought ingnition rebuild kit. Cap,dust cover,points,condenser,wires and plugs. Installed them all, fired up tractor. Ran very nice. Idle fine and rev up. Warm up for a few minutes. Then put in gear to back out of barn. Started to cough & sputter. Not rev up. Ran very poorly. I did not replace the coil. Have one I bought. Not sure if this tractor is supposed to have a internally resisted coil or not. Couldn t find a resistor on tractor. Bought coil 12v with internal resistor. Is this correct for a 3400.
Also when I pulled the plugs they were white as a ghost. Makes me think it s starved for fuel at some point. But ran fine till reverse to back out of barn.
Any ideas we ll be helpful.
Considering to put original Holley carb back on after a good cleaning.

 

[sotxbill]

The 3400 has a resistor wire... to feed the coil.. assuming no one has rewired it. It also had a bypass wire from the starter that gave the coil full voltage when starting. hth.

 

[Eman85]

White plugs, sputters and won't rev up I'd be looking at fuel. First check to see if fuel flows freely from tank then if it's getting to the carb. Still have the old carb? Put it on and see what it does.

 

[Craig 59 641]

(quoted from post at 19:05:48 07/31/23) Repairing a ford 3400 for a friend. Was running poorly. Wouldn t rev up. Another person replaced the stock Holley carb with ?? Not sure of. Had a gas leak they thought it was carb. So replaced it. Still had a leak. Called me into help. Found leak in fuel pump. Replaced it. Ran better. But had a skip in idling. Ck points. They were worn down gap off. Bought ingnition rebuild kit. Cap,dust cover,points,condenser,wires and plugs. Installed them all, fired up tractor. Ran very nice. Idle fine and rev up. Warm up for a few minutes. Then put in gear to back out of barn. Started to cough & sputter. Not rev up. Ran very poorly. I did not replace the coil. Have one I bought. Not sure if this tractor is supposed to have a internally resisted coil or not. Couldn t find a resistor on tractor. Bought coil 12v with internal resistor. Is this correct for a 3400.
Also when I pulled the plugs they were white as a ghost.
Makes me think it s starved for fuel at some point. But ran fine till reverse to back out of barn.
Any ideas we ll be helpful.
Considering to put original Holley carb back on after a good cleaning.

Well ck gas tank pretty clean no rust. Plastic filter fell off petcock. Put back on. Fuel flows to fuel pump and into sediment bowl (cleaned bowl) then thru carb just fine.
Engine starts fine. Idle a little rough. Won t rev up quickly with gas pedal or throttle bar.
But if I move carb throttle by hand slowly it revs up nicely.
I mean really slowly. Need some help in a direction to go.

 

[Jim L WA]

Hi Craig, welcome to the forum. Eman85 gave you a direction to go. Put the Holly carburetor back on. Your friend thought it was the cause of the leak, but it wasn't, so there is probably nothing wrong with it.