Finally!!!
Thread Starter
|
Posting Guru
Joined: Feb 2004
Posts: 1,354
Likes: 0
From: Jackassville
Finally!!!
Finally today I started my motor for the first time in about 5 months. I had to pull it out to put the plugs in properly, they were backwards. It started after only a few cranks. This thing is really powerful. It has exceeded my expectaions and then some. Its really hard to control the throttle, everytime I step on the gas it peels out and accerlates really hard. This thing rocks! All of my hard work has finally paid off and I can enjoy it. My oil pressure is hovering around 30 psi but I think my gauge is off and I have more then that. Also there are no oil leaks. I do have a slight problem though. I am running a Holley 600cfm 4bbl Vacum Secondary carb. I know nothing about carbs at all. Whenever I accerlate hard, it stumbles/hesiates, then revs all the way to redline. I plugged all of the vacum ports on the carb. How do the secondarys work on the holleys? Do the back 2 barrels open from inteneral vacum or is there an exterior vacum line on the carb do open up the secondarys? I know its a dumb question but I really know nothing on carbs at all.
You cant beat the old FE's, I am not kidding this thing is extremly powerful, and its not even broken in yet!
You cant beat the old FE's, I am not kidding this thing is extremly powerful, and its not even broken in yet!
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Great job! Now the fun begins! 
The secondary diaphram picks up vacuum from a port in the primary throttle bore. The air going by the port creates a vacuum, which pulls the diaphram up, overcoming the pressure of the spring, and thereby opening the secondary throttle bores. Therefore, the secondarys open as a result of airflow, not manifold vacuum like their name may imply.
That doesn't sound like your problem though. I think its the accelerator pump. Take the air cleaner off and, with the engine off, manually actuate the throttle while looking down the carb. Have the choke fully open obviously. You should see a small jet of fuel squirting into the primary (not secondary) throttle bores as you open the throttle.
Refresh us on the specifics of your build again, if you would.
The secondary diaphram picks up vacuum from a port in the primary throttle bore. The air going by the port creates a vacuum, which pulls the diaphram up, overcoming the pressure of the spring, and thereby opening the secondary throttle bores. Therefore, the secondarys open as a result of airflow, not manifold vacuum like their name may imply.
That doesn't sound like your problem though. I think its the accelerator pump. Take the air cleaner off and, with the engine off, manually actuate the throttle while looking down the carb. Have the choke fully open obviously. You should see a small jet of fuel squirting into the primary (not secondary) throttle bores as you open the throttle.
Refresh us on the specifics of your build again, if you would.
Thread Starter
|
Posting Guru
Joined: Feb 2004
Posts: 1,354
Likes: 0
From: Jackassville
Okay Im running a Crane 901, Melling Timing set, Melling pushrods, Holley 600, Dynomax headers, 64 Ford Intake 4bbl, Stock Rotatating assy, Melling HV oil pump, high strength oil pump drive shaft, stock 66 heads.
Thread Starter
|
Posting Guru
Joined: Feb 2004
Posts: 1,354
Likes: 0
From: Jackassville
The accerlator pump is fine I took a look at it and it it is squirting fuel niciley. This is a newly rebuilt carb, so Im hoping everything in the carb will be in good condition. Also, I am at about 6,000 ft, what jet size should I be running? The dude that sold me the carb said it had #66 jets in it, is this the right size jet for this elevation? I am wondering if maybe my jets need to be change to solve the stumbling problem.
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
I dont think its the jets. If they were too lean it would ping at WOT. Now I'm thinking its too flimsey of a vacuum secondary spring. What this does is allow the secondaries to open too soon, creating a lean condition since the secondaries have no accelerator pump. Basically, you need to change (or have changed) the secondary spring. Any good auto parts store or speed shop will have a spring set. When I was running the Holley 600 vacuum secondary on my 360 I always used the purple spring. I tried the yellow one and it seemed to bog a little before it took off. They should have a chart on the back of the package as to what springs are applicable for what type of vehicle.
Elder User
Joined: Jan 2004
Posts: 867
Likes: 0
From: Eastern Pa
When you say that you accelerate hard, do you mean from idle or from a cruise mode? It could still be in the accelerator pump and squirter area, or the secondary springs as Rusty suggests. It would not be uncommon to have to little of a shot of fuel from the pump and squirters. There is also a pump cam assortment Holley sells to change when the pump shoots it's load. You can even get different squirters, of if you have a wire drill set you could open up the ones you have. I would start with the secondary springs, then the pump cam if that doesn't work, then either enlarge the squirters of even go to a 50cc pump if it will fit your model of carb.
Thread Starter
|
Posting Guru
Joined: Feb 2004
Posts: 1,354
Likes: 0
From: Jackassville
Thanks for the response rusty and tastyklair, Im thinking that it is a weak spring like rusty suggests. I tried everything today to get the flat spot out but no matter how much tuning I did that darn hesiatation was still there. My other theroy is the accerlator pump is clogged with some dirt or something. I am contacting the dude that rebuild the carb tommorow to ask him about it. This flatspot, or heasitation comes on very quickly, after the flatspot though it screams all the way to redline, I have not been able to floor it yet, just too much wheelspin and loss of control. When I get it registerd and back on the road ill be able to see what its really got. It has much more power then I antictaped, its very addictive.
Trending Topics
Posting Guru
Joined: Jul 2003
Posts: 2,232
Likes: 1
From: Colville, Washington
You also need to make sure there is NO clearance at idle between the accelerator pump cam and the lever on the bottom of the acc. pump diaphragm assembly. It might not be squirting at the right time. I don't think it would be clogged or you would have a very poor pump shot.
Great news tho!!!
Great news tho!!!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic 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
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
And also If when you had problems with it before and it back fired thru the carb..you might have a blown out power Valve in the metering block?? And double check your timing..and Like Putt said you want the Pump arm touching the The pump..but with NO pressure being on it.... Good Luck!! I know its been a long time waiting!!
Russ
Russ
Thread Starter
|
Posting Guru
Joined: Feb 2004
Posts: 1,354
Likes: 0
From: Jackassville
Thanks for the help guys. I contacted the carb builder and he told me to try some stuff. I adjusted the little nut that controls the accerlator pump thing. It solved it. This thing is running perfect now and hauls ***! What a blast! All that work, time and money has paid off, I have a powerful daily driver that doseant leak anything, doseant tick, and doseant smoke, and I can keep up with the best of em. Next Goal: Pay off the loan for this thing, I owe my parents about $300. Im gonna get a part time job so I can still go to school and work at the same time.
Thanks for the help this is the biggest acomplishement of my life.
Thanks for the help this is the biggest acomplishement of my life.
Thread
Thread Starter
Forum
Replies
Last Post
ollirrap
1973 - 1979 F-100 & Larger F-Series Trucks
5
Dec 18, 2012 09:38 AM
F 250 6 liter
6.0L Power Stroke Diesel
2
May 29, 2010 07:14 PM
4doorford
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
11
Jul 16, 2009 06:24 PM
sklinemansk
1973 - 1979 F-100 & Larger F-Series Trucks
6
May 17, 2009 07:06 PM
FERacing66
Fuel Injection, Carburetion & Fuel System
1
Jan 7, 2005 02:19 AM