Hotrod429429429

I have a 1984 Ford Bronco with the 351w it currently has a motorcraft 2150 carburetor on it that I rebuilt the other day I fired it up and it had an extremely high idle tried to kick it down and the engine stalls out. Tried adjusting high idle screw and does nothing. The air/fuel screws are set 1 1/2 turns out what am I doing wrong ready just buy a four barrel intake and carb and be done with it. Any help is appreciated thanks in advance.

Mailho69

I am sorry, I'm not much of a carburetor wiz, but it sounds like there is an air leak somewhere.
I have always had luck ditching the stock carb and replacing it with an Edelbrock intake (#2181 for the 351w) and a #1406 carb.
The carbs are very reliable and easy to adjust if it is even necessary. They are pretty plug n play right out of the box in my experience.

Chris_1

iTrader: (1)

Been a really long while since I played with a carburetor; seems to me I recall we would turn the screws out 3 1/2 turns to get it to run at idle then adjust from there.
Turn 1 screw in until the engine starts to roll a bit, the out till it starts to roll, then exactly halfway in between. Then do the other screw.
Then go back and do them both again.
If you already have it where it will run at warm idle you just need to adjust the screws from there,
Never turn the screw all the way in hard; that can damage the screw or more likely the bore it sits in.
That's how I remember doing it, and I set up a lot of carbs before EFI showed up.

burnthelight88

Sounds like it may be two issues to me. Check google for a 2150 tuning guide.

Issue one I would guess is your high idle cam. That's why it's on high idle. Its a huge PITA to mess with but doable.

Issue two sounds like once it kicks down you need to adjust some settings as described by the users above.

77Ranger460

I have never had much luck with home rebuild carb kits. On the other hand, I have bought professionally rebuilt carbs from specialty carb shops and have had zero trouble. I bought a Motorcraft 4350 to replace a troublesome 4350 that was on my 460. I bolted it on, set the choke and have had no troubles.

burnthelight88

I rebuilt my first one when I bought this truck and I thought it went easy with the guide and the results are great, but my experience tuning could be better. I paid like $50 for the kit which also covered a brass float.

Google Mikes Carb Parts if you're interested in a rebuild.

77Ranger460

No offense, but the tuning problems you are having leaves me questioning the rebuild.