Edelbrock carb question
Thread Starter
|
Senior User
Joined: Apr 2012
Posts: 324
Likes: 0
From: Spencer Mountain, NC
Edelbrock carb question
Have an Edelbrock carb on the 351W in my 74 F100. While trying to tune the carb I found that I can completely close the idle mixture screws and the engine still runs. Should shut down due to lack of fuel. Only thing I can figure is the carb is still flowing fuel. My thought is that the fuel pressure is to high causing it to dump fuel. Any other ideas?
New User
Joined: Jun 2014
Posts: 21
Likes: 0
Might try changing metering rods and jets to a smaller size by pulling the top off the carb and or springs. You can just try changing metering rods to start with. I believe 5 to 7 psi is what an eddelbrock calls for do you have a fuel regulator? Hope this helps I haven't messed with them a whole lot but thats my thought
Cargo Master
Joined: Oct 2010
Posts: 3,417
Likes: 32
If you were overflowing the floats you would more then likely have fuel pouring out of your carb. 5 to 7 psi is correct. A stock Ford fuel pump can over pressure an edelbrock carb.
I seem to remember my last edelbrock would run like crap with them closed but not die. Either way you don't run with them closed anyway. Run them in until they stop back them out 1.5 turns. Warm up your truck completely, then tune the idle mixture to highest vacuum at idle. Last adjust your idle speed.
I seem to remember my last edelbrock would run like crap with them closed but not die. Either way you don't run with them closed anyway. Run them in until they stop back them out 1.5 turns. Warm up your truck completely, then tune the idle mixture to highest vacuum at idle. Last adjust your idle speed.
Thread Starter
|
Senior User
Joined: Apr 2012
Posts: 324
Likes: 0
From: Spencer Mountain, NC
I did install a fuel pressure regulator but haven't checked the output pressure. Will do that today. With the engine warmed up adjusting the screws has very little to no effect on idle. Since the engine runs with both screws closed there has to be fuel getting through the carb from somewhere and I can only figure overpressure is causing this.
Cargo Master
Joined: May 2010
Posts: 3,365
Likes: 12
From: NW Indiana
If you have been over pressured make sure to take a big wiff of your engine oil. That can gas up your crankcase oil pretty quick.
Trending Topics
Cargo Master
Joined: Dec 2009
Posts: 3,452
Likes: 2
From: Santa Fe Tx
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
Cargo Master
Joined: Nov 2009
Posts: 2,364
Likes: 117
From: starship enterprise
Might have the idle stop screw open too far. Close the plates down if possible. If this is not an option, like it won't run with plates closed, see if you can open the secondary plates slightly allowing more air, then close the primary plates to allow for proper idle speed. It sounds like your throttle plates are open far enough that it is allowing for fuel to be pulled from the transition circuit.
Thread
Thread Starter
Forum
Replies
Last Post
Dads76XLT
1973 - 1979 F-100 & Larger F-Series Trucks
10
Jul 28, 2017 03:30 AM
dorf dude
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
14
Feb 17, 2013 08:04 AM
Adam805
1973 - 1979 F-100 & Larger F-Series Trucks
11
Nov 8, 2011 06:32 PM