Carb
Thread Starter
|
Posting Guru
Joined: Sep 2006
Posts: 1,781
Likes: 1
Carb
I have an 85 F150 with a 351 HO Winsor. It has the stock 4 barrel holley on it. My problem is that I rebuilt the carb and now im not sure how to dial the carb in because the truck seems to be running rich. I have also rebuilt the engine so I know that its the carb that is causing the truck to run rich. If anyone knows how to dial that carb in that would be great.
More Turbo
Joined: Mar 2002
Posts: 508
Likes: 2
From: Easthampton, Ma.
Is the choke wide open when the motor is warm?
Did you adjust the floats with the motor running as per the rebuild instructions?
Did you adjust the idle mixture screws after the truck warmed up, at idle with the choke plate wide open?
Are the secondary throttle plates shut tight?
Did you follow the rebuild instructions to the "T"?
Steve G.
Did you adjust the floats with the motor running as per the rebuild instructions?
Did you adjust the idle mixture screws after the truck warmed up, at idle with the choke plate wide open?
Are the secondary throttle plates shut tight?
Did you follow the rebuild instructions to the "T"?
Steve G.
Thread Starter
|
Posting Guru
Joined: Sep 2006
Posts: 1,781
Likes: 1
Carb
The choke itself is working right and operating correctly. And I followed the rebuild instructions to the T. I also set the float levels while the engine was running per instructions. However the idle mixture is the problem. Im not really sure how to set them. I know where they are obviously but I have never set the idle mixture before. I am not sure what the right mixture would be. And it does adjust through the front of the baseplate.
Thread Starter
|
Posting Guru
Joined: Sep 2006
Posts: 1,781
Likes: 1
So just play with them once you back them out the 2 1/2 turns?? Cause I believe that thats what I did when i rebuilt it was just run them in and then back them out 2 1/2 turns. And where would I place the vacuum gauge at??
Freshman User
Joined: Sep 2006
Posts: 48
Likes: 0
Any port thats open on the carb or intake , try to get the highest vac reading possible and make sure you have no leaks!
Trending Topics
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
Adjust one side at a time.
All you need to do is, from your initial setting, screw one in slowly until the engine just starts to stumble. Then back the screw out until the engine just smooths out.
All you need to do is, from your initial setting, screw one in slowly until the engine just starts to stumble. Then back the screw out until the engine just smooths out.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Posting Guru
Joined: Sep 2006
Posts: 1,781
Likes: 1
I am down at college right now so I think I am going to wait till I get back home for Thanksgiving before I attempt to dial it in. I just dont want to be stuck down in Bloomington if something for some reason goes wrong.
Postmaster
Joined: Jun 2004
Posts: 3,759
Likes: 0
From: Pleasant Hill, MO
I'm having the same problem, but it tends to dissipate after warm up. I'm suspecting idle mix screws being calibrated wrong, but I'm not terribly sure.
We're working on an 84 bronco with the edelbrock 390 installed.
Like I said, the problem mostly goes away after warm up. When we start it, the engine gets flooded and stalls out. It gradually gets better, but the idle is never 'quite' right.
Ryan
We're working on an 84 bronco with the edelbrock 390 installed.
Like I said, the problem mostly goes away after warm up. When we start it, the engine gets flooded and stalls out. It gradually gets better, but the idle is never 'quite' right.
Ryan
