Carburetor help again !!
Posting Guru
Joined: May 2004
Posts: 2,161
Likes: 1
From: Prince George, B.C.
Sounds more like the fast idle to me, the electric choke could need adjustment and also the fast idle screw. Is it better when it warms up? I'll pm you with my e-mail and you can send me the pics of the linkage and I'll see what I can find.
Thread Starter
|
Senior User
Joined: May 2005
Posts: 447
Likes: 10
From: Jacksonville IL
Don't seem to me to be the fast idle. There is a metal piece where the linkage from the gas pedal connects and the spring to retract connects. On the bottom of the metal piece is a screw protruding out. Very close to it is another metal piece, which actuates either the acelerator pump/jet/needle (I don't know!!) or the choke. Now, this metal piece seems to rest on the screw, thus keeping the choke open. When I hit the gas pedal, the screw withdraws (obviously) and the metal peice that actuates the accelerator moves down on a hinge, thus increasing. When the gas pedal is let go, the screw than locks the metal piece (actuating the accelerator) in place !!
Once I get PM, I will send pictures. I will also call up Edelbrock tech guys.
Once I get PM, I will send pictures. I will also call up Edelbrock tech guys.
Posting Guru
Joined: May 2004
Posts: 2,161
Likes: 1
From: Prince George, B.C.
Close the choke, so it is on fast idle, and turn the screw out till it is at about 1000-1200 Rpm or so it sounds clost to that anyway and all should be well. You may have to turn the PM function on in the User CP section.
Last edited by 351M; Jun 2, 2005 at 02:08 PM.
Thread Starter
|
Senior User
Joined: May 2005
Posts: 447
Likes: 10
From: Jacksonville IL
Guys ! More info ! I think it is actually the fast idle system. When I first start, the fast idle screw rest on the fast idle cam and the rpm is high. When I hit the gas pedal, should not the screw back off from there? It seems like choke is not opening back up, thus making the cam sit where it is when I hit the gas pedal. How long does it normally takes before the choke opens up?
351M, I got your PM. Will send you pictures after I take them tonight.
351M, I got your PM. Will send you pictures after I take them tonight.
Posting Guru
Joined: May 2004
Posts: 2,161
Likes: 1
From: Prince George, B.C.
It shouldn't take long for the choke to open, usually no more then 5 min. Is it hooked up to power and ground? If so it may be set too rich, you can loosen the 3 screws around the black part and turn it to the leaner side, so that there will be less spring pressure on the plate and it will open quicker.
Thread Starter
|
Senior User
Joined: May 2005
Posts: 447
Likes: 10
From: Jacksonville IL
It is hooked up to a 12V power and ground. Power activitates only when ignition key is on. I see some marks on the black part and I can see that is more towards rich. But here is my concern. Today at parking lot of my work place, the truck started idling high when I first started. I waited about a minute and it will not go down. So, I put it on gear and drove all the way home with it idling very high. That tells me something is wrong. I would imagine the choke will open up as soon as I hit the gas pedal.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
well where did you hook the 12 volt wire from it needs to be off the alternator stator wire for it to work right
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
Posting Guru
Joined: May 2004
Posts: 2,161
Likes: 1
From: Prince George, B.C.
Not always, I have had a few engines with different types of chokes, One Dodge had a Quadrajet with the same style choke as you have, you could redline that engine and just lift off the gas instantly and it would still fast idle, yet once it was warm enough for the choke to open it was fine. I have also had older dodges that had the other style, well type I think, if you even lightly touched the gas even seconds after starting it it would go off fast idle and stall. Try leaning the choke out and see what happens. Also if you have the truck off, take you finger and push the choke plate open, then at the same time push the throttle open and let it go, if it is indeed the fast idle, then that will kick it to slow idle and when you start the truck (without touching the gas) it should idle slow.
Thread Starter
|
Senior User
Joined: May 2005
Posts: 447
Likes: 10
From: Jacksonville IL
The Edelbrock instructions said that it should not be off the alternator and so I did not explore that route at all. However, I made very sure that my source had constant 12V when the ignition is on with a multimeter. The source seemed to be where a electric choke was once hooked up.
I will try to lean the choke out and see what it does. How much lean should I go?
I will try to lean the choke out and see what it does. How much lean should I go?
Posting Guru
Joined: May 2004
Posts: 2,161
Likes: 1
From: Prince George, B.C.
I usually do it by feel, I will do it till it has just enough pressure to close the choke plate, just prop the throttle open and turn the choke till it hangs open and then adjust it till it just closes and if you like go a bit tighter then that. It may not be the right way but that is how i do it.
Thread Starter
|
Senior User
Joined: May 2005
Posts: 447
Likes: 10
From: Jacksonville IL
Hi ! Got the problem fixed !! It was my stupid mistake. I did check a 12V source, but there was a 5V source right by it. I connected to the 5V source instead of the 12V source. When I reconnected to the correct source, it is running as fine as it can be !!Now, I am keeping my fingers crossed to get better mileage than before. I am looking for 10 - 12 miles a gallon.
Regarding the PCV valve, there is two outlets in the valve. One hooks to a 3/8 hose while the other is small - maybe 1/4 in size. The 3/8 hose hooks up the intake manifold behind the carburetor. The 1/4 outlet is not hooked up to anything. The intake manifold is from Holley - was not able to see the part number because of dirt ! I will clean and get that. Is this setup good?
Regarding the PCV valve, there is two outlets in the valve. One hooks to a 3/8 hose while the other is small - maybe 1/4 in size. The 3/8 hose hooks up the intake manifold behind the carburetor. The 1/4 outlet is not hooked up to anything. The intake manifold is from Holley - was not able to see the part number because of dirt ! I will clean and get that. Is this setup good?
Posting Guru
Joined: May 2004
Posts: 2,161
Likes: 1
From: Prince George, B.C.
I need to see pics of the front and rear of this setup, there should be a vacum port on the intake behind the carb that hooks to the brake booster, and then the one on the front of the carb that hooks to the pcv. Both will probly be about 3/8" then the vacum advance goes to one of the small ports on the front of the carb.