Make sure there is a check needle below the main discharge. You can also check the adjustment by measuring (F) which should be 18/64. Please complete the fields below to send your friend a link to this product. Could the float bowl actually be the problem? When Quadrajet carburetors have Carter's basic four-digit identification number before the letter S, the carburetors are aftermarket replacements. Test the needle by holding it down gently with a brass drift punch. 60 pages of great info. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. Do not depress float lip against spring in needle, but let float rest of its own weight. Adjust by bending unloader lip on throttle shaft lever. 1956 Plymouth, Powerflite Transmission Dashpot, 1955 Pontiac Loading or Carburetor Flooding, 1956 Pontiac Hard Starting, Partially Warm Engine. Rotate throttle stop screw E until engine idle at approx 500 RPM. Fuel is puffing out nozzles on primary circuit at idle on primary carb of a dual carb set carbs were just rebuilt what is the cause. New fuel pumps are especially suspect. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. To correct, remove carburetor and turn it upside down. If the secondary throttle plate is staying open, then check the primary shaft dog and spring. This is caused by side strain on throttle lever due to misalignment and maladjustment of the carburetor interconnection rod. The all-aluminum AFB (Aluminum Four Barrel) was a big innovation in 1957, and lives on today under the Edelbrock name. Carter WCFB 4 Barrel Adjust Float. Two ports act as calibrated air bleeds. Once engine speed gets high enough, the carburetor vacuum is strong enough to pull fuel through the main jet and the accelerator pump circuit is no longer used. This is percolation. Run a blunt object around the inside of the leather cup to make sure any coating is broken. They need to be centered in the bowl.Fuel could be leaking around the needle & seat. When I slow down to an idle, my engine runs rough. Secondarys are somehow stuck open (which amounts to a vacuum leak). It's highlighted yellow and will look something like this. There may be a blockage in the accelerator pump circuit which would also make it hard to pump.What is the carburetor number so we can make sure you have the correct pump?Polish the pump well with crocus cloth. Examine the viton tip for any marks.Fuel pump pressure could be too high. The main body is partitioned into two compartments (primary and secondary), each containing a double pontoon float and lever assembly and a needle valve and seat. Carter 2 Barrel BBD Adjustments Mikes Carburetor 21.5K subscribers Subscribe 7.9K views 1 year ago In this video we are going to show you how to do the various adjustments on both the Air. How to Adjust a Carter BBD 2 Barrel | It Still Runs The Carter carburetor has been around for a very long time. Correct by removing any burrs or nicks. 1st check to make sure the fast idle linkage isnt holding the valves open. Adjust by bending the choke connector rod at lower angle (H). Press down on vacuum piston link C until metering rods bottom in the carburetor body. Carter WCFB, 4 barrel carburetor manual. No metering rod gauges are necessary. 1957 Desoto Adventurer Loose Throttle Lever Rear Carburetor. intro Carter WCFB 4 Barrel Carburetor Rebuild Mikes Carburetor 21.5K subscribers Subscribe 51 Share 3.1K views 9 months ago Disassemble & assemble your Carter WCFB 4 barrel. The balance passage also tends to prevent flooding in the event one of the needles should temporarily become stuck open by maintaining equal fuel level between the two float chambers. Carter carburetors fitted with air bleed idle mixture adjustment also have fuel emulsion mixture needles, but these are sealed at the factory to limit the amount of fuel admitted during idle. Other than that, great company to deal with. One caveatits my impression that the float bowl is full because when I disconnect the fuel supply line from fuel pump (to card), it has pressure on the line. In this video I show you how to replace the fast idle spring on the WCFB carburetor. During high speed operation a vacuum exists at the pump jets. Fig. Add a couple drops of oil to the leather. Carter WCFB Build Sheets b. There should now be 9/64 clearance between upper edge of choke valve and inner wall of air horn. Put some fluid in theaccelerator pumpwell and press down on the pump. The Carter WCFB, 4 barrel carburetor metering rods are used to meter the fuel getting into the carburetor bore. Probably around 4- 4.5lbs. Carter WCFB Metering Rods 4,292 views Jul 15, 2018 28 Dislike Share Save Mikes Carburetor 18.7K subscribers https://www.carburetor-part.com is providing this video about the Carter WCFB 4. You need to run wire down all small passages. 1955 Cadillac Idle Air Mixture Circuit WCFB Carburetor Cutting Out on Left Hand Turn It should not be opened up. As the accelerator is released and the primary throttle plates are closed to the idle position, the upward movement of the pump plunger and attached spring bracket exerts tension on the spring and tends to stabilize the float in a level position. Carter WCFB Rebuild kits: Rebuild Kits. Be sure these ports are clear. If not, then find the check ball and make sure it is loose. Most of the single step rods were steel. One of the butterflies is open about 1/8 with the carburetor dis assembled. The setups data is the same. Place the choke housing toward the left and remove upper right main body to throttle body screw. This can be done by looking at the impression on bowl cover gasket. Make sure the pump relief check is clean. The download link can be found on your order confirmation email which you will receive as soon as you complete the order. Fast, secure e-book download. Measure float height as illustrated above. Use a brass drift punch. All These Part Numbers Interchange Into Our Part No. Carter WCFB Accelerator Pump Adjustment The accelerator pump is used to provide an extra squirt of fuel when you step on the gas. They work fine when I push hard down on the piston. Can't find the answer you're looking for? A bushing (sorry dont have size) can be permanently installed in the choke vacuum passage in main body casting provides a more positive seal at this point, and prevents fuel from leaking into this passage on left turns and stalling the engine because of too rich a mixture. Install the pump connector rod (D) in the outer hole, long stroke. I have taken this carb a part and rechecked floats adjustments and blown out passages with compressed air thank you. You should feel some pressure and fluid should not be bypassing the check needle. Your friend will receive an email from you with a link to our site. Refer to the Adjustment Data Table for adjustment dimensions. This restricts the flow of fuel. 2: Carter AFB idle mixture and speed adjustment screws. You are flooding (getting too much gas in the float bowl), caused by these types of problems. Place universal pump travel gauge T109-117S (if you happen to have one as they are not available) inverted on edge of dust cover boss of bowl cover. Blowing out passages will not get them clean enough. With choke valve held tightly closed, take slack out of linkage and tighten clamp screw on choke lever. Check any vents to make sure they are open. DO NOT apply any pressure on the needle. *New Accelerator Pump5. The mixture screw may be bent, or damaged. . 3: Holley 4150 idle mixture and speed adjustment screws. Coat threads of screw with sealing compound and install it. Carter WCFB 4 Barrel Accelerator Pump Circuit Carter BB Carburetor Assembly Part 1 of 2 Rochester Quadrajet Idle Tube Removal Tunning Rochestor Quadrajet 4 barrel Carburetor Mark Osborne. 41-108N Carter 2818S Carter 3059S What Has Been Done to This Carburetor?1. Access our free Idle Speed and Mixture Repair Guide for Chevrolet Corvette 1963-1982 through AutoZone Rewards. To prevent fuel from being drawn through the pump circuit, the passage to the pump jets is vented by a cross passage to the carburetor bowl above the fuel level. Can't find the answer you're looking for? Carter WCFB, 4 barrel metering rod adjustment instructions. The vacuum piston is no longer produced and can only be found as a NOS piece, or used. *New Main Body Gasket8. Manufacturer CARTER : Brand CARTER WCFB : Model Carter 4 BBL WCFB : Item Weight 12 pounds : Country of Origin USA . Make sure the ball rattles. Adjust by bending lip of float, not float arm. *New Airhorn Gasket7. Then close throttle. This E-manual is pictured with the Carter WCFB carburetor with the upper auto choke. Carter WCFB Adjustments Metering Rod Adjustment Back out throttle screw so that the throttle valve close completly. Did the old gasket get removed? Kit looked complete but I ordered the wrong one based on the pump and of course with it being opened, it cannot be returned. You cannot go wrong with Mikes carburetor in any way. Tyler's Forgotten Car Rescue 22,933 views. If not then clean it and try again. Metering rods for the WCFB have been out of production for several years now. Free shipping for many products! With the thermostatic coil housing gasket and baffle plate removed, crack throttle valve and hold choke valve closed. Adjust by bending throttle connector rod at upper angle (B). The ends of the connector rod should point to the throttle arm side. When the piston is frozen you may have to drill a small hole in the bottom of the float bowl, just under the piston and hammer it out. Carter WCFB 4 Barrel Carburetor Float System. 5:04. cm448. This is an electronic rebuild manual, no physical copy will be provided. Complete service manual: Comprehensive factory service information (341 pages) for the Carter WCFB carburetor. The manual says to back out the throttle stop screw and hold the fast idle cam in the "choke open" position, then screw in the throttle stop screw until it just contacts the throttle lever arm, then give it another full turn. Carter WGD Adjustments Float Level With bowl cover assembly inverted and float resting on pin in seated needle, and with gasket removed, the distance from the bowl cover to the top of float should be 7/64. At idle you are at maximum vacuum which makes the metering rods drop down into the main jets. The balance passage also tends to prevent flooding in the event one of the needles should temporarily become stuck open by maintaining equal fuel level between the two float chambers. Someone has installed it improperly. Will Carter introduced the world's first 4-barrel carburetor, the WCFB (Will Carter Four Barrel) which raised air-flow to unprecedented levels. The Carter WCFB carburetors have a square-ish body with a rectangular air horn that protrudes above the air. I have a 1952 Buick Roadmaster and just rebuilt the Carter WCFB carb, and I'm setting the idle according to the factory manual. Carter WCFB 4 Barrel Carburetor Float System Adjusting the WCFB float level and float drop. Adjust by bending the connector rod at the lower bend (E). WCFB Carburetor Cutting Out on Left Hand Turn. Founded by William Carter in 1909, the Carter Carburetor Company produced units such as the AVS, AFB and 385-CFM WCFB for dozens of years. Check throttle linkage to make sure that primary throttle valves come to full wide open position. Float adjusted wrong check float level.Float leaking heat up some water and immerse the float. This check prevents excessive pressure in the discharge passage during acceleration. If the fuel bowl is not filling up enough to fill the pump well, then look at a sticking float needle. Recheck unloader settings with carburetor on the engine. With carburetor installed and engine warmed up. Check your auto manual for the spec, but somewhere around 4-5 lbs would be good.Be sure the power piston is not frozen in one position. (note) The metering rods will fit into the jets loosely. Carter WCFB 4 Barrel Carburetor Float System, Engine wont idle, or dies after the choke is opened, or runs better when choke closed. If hard starting still exists change the choke setting to one point lean. Older kits 30-70s. The bowl vent is used to vent the float bowl, otherwise a siphoning of the gas can occur. On the WCFB the check ball is usually at the bottom of the pump well. Sometimes scraping around the edges with an awl will remove the staking. Be careful removing the intake check retainer. BBS) and were basically an on/off condition similar to the function of a power valve. Solid fuel has the 2 tubes pointing up. Fig. Why Doesn't Adjusting Idle Mixture Screws Make any Difference? 1: Carter WCFB idle mixture and speed adustment screw location. Back out throttle stop screw until throttle valves seat in bores. This allows air instead of fuel to be drawn off the pump jets. 1956 Plymouth, Powerflite Transmission - Dashpot The dashpot has been eliminated. I have repeated multiple times with same results. Carter used metering rods with a single step, 2-step, 3-step, and 4-step. It will be very helpful as I try to improve my performance and emissions of my 57 Corvette street machine. There should be a retainer keeping the check ball in place. Gasket between bowl and base is installed backwards (easy to do). As the throttle is opened the pump moves down the pump well forcing the intake check closed and forcing fuel out the main discharge. A stand pipe is provided at both needle seats as an additional trap for foreign material that might prevent the needle valves from seating properly. The item you are trying to purchase is currently out of stock.Please enter your name, email, and phone number below. Download was not the correct rebuild instructions for my WCFB carburetor, and the correct version was not available. Watch on. Because the float is maintained in a level position, needle valve bounce is minimized and excess fuel entry into the bowl is prevented. This restricts the flow of fuel. The adjustment of the pump is important in order to get the required fuel. The metering rod adjustment should be done after the pump adjustment. They sometimes need trimming. *New Float6. Make sure the air cleaner gasket does not block the bowl vents. How to clean the Jeep Carter BBD carb Idle jets - Duration: 7:14. See figure 9F-2. Press down on the vacummeter link (H) until the metering rods bottom in the carburetor body (J). The flat surface of the pump arm should be parallel to the straight edge. Air Bled has the venturi tube pointing down into the bore. Fuel enters the primary side of the carburetor through a strainer screen at the fuel inlet and is directed to the primary needle valve and seat. Piston force is too much for linkage. Adjust idle screws D to produce a smooth idle of correct speed is obtained. The adjustment of the pump is important in order to get the required fuel. Adjusting the WCFB float level & float drop: The main body is partitioned into two compartments (primary and secondary), each containing a double pontoon float and lever assembly and a needle valve and seat. FREE to our customers that buy a rebuild kit. Both valves should be closed. The single step rods were used on some of the price leader carburetors (i.e. Outside top of early Carter tool box with correct decal. Float drop not set, or fuel pump pressure too low. Each float on the float assembly should be at the same height and centered so that they dont rub the side of the float bowl. They are staked in the hole. With engine running, check for an air leak at front left corner of carburetor between throttle body and bowl by squirting carb cleaner at this point. In this video we are going to show you how to do the various adjustments on both the Air Bled and the Solid Fuel type of BBD carburetors. Turn knurled nut of gauge until finger on gauge just touches top of plunger shaft (A). Using the exploded view on reverse side as a guide, disassemble the carburetor far enough to permit thorough cleaning and inspec tion o! With bowl cover assembly inverted and float resting on pin in seated needle, and with gasket removed, the distance from the bowl cover to the top of float should be 7/64. Rochester and Carter replacement parts are interchangeable. Quick test to see if the accelerator pump is working. The accelerator pump circuit resides on the primary side of. Master Technician Tool Set (early, circa 1935, for 1923~1935 Carter carburetors all makes - most tools then current) Carter Master Technician Tool Set about 1951. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Disassembly2. These diagrams include: Fig. The main body is partitioned into two compartments (primary and secondary), each containing a double pontoon float and lever assembly and a needle valve and seat. The fuel is also conducted through a passage in the air horn to the secondary needle seat. Gasket removed. Measure from center top surface of pontoons to air horn. Hold a straight edge across top of dust cover housing, next to the pump arm. Hold in place and carefully tighten metering rod arm set screw (G). Fuel enters the primary side of the carburetor through a strainer screen at the fuel inlet and is directed to the primary needle valve and . 1955 Pontiac - Loading or Carburetor Flooding See figure 9F-2.A float lifter spring, which is connected to the lever arm of the primary float and to a bracket on the accelerator pump plunger, is incorporated to stabilize primary bowl fuel level and prevent float bounce upon sudden stops, or on rough roads (these springs are nowhere to be found). Hold throttle valve wide open and close choke valve as far as possible without forcing. Adjust idle screws D to produce a smooth idle of correct speed is obtained. Adjust by bending throttle connector rod at deepest angle as shown. William C. Carter was born in Union City Tennessee in 1884. Holding the rods down and seated in the bottom (J), revolve metering rod arm until finger on arm contacts lip (K) of vacumeter link. However, it is very similar and I found it very useful. Fuel pump working as it should (pulsates and sprays gas each time cam lobe activates it). Also check for overheating of the engine, fuel lines too close to the manifold, or too much heat in the engine department. The correct way is to use a fuel pump pressure gauge. Anti-Rust "Dichromate" Finish**4. While holding the parts as indicated above, rotate the metering rod arm B until the finger on the arm at D contacts the lug on the vacuum piston link C. Primary & secondary float will probably have different measurements. Enter Carb Number. The ends of the connector rod should point to the throttle arm side. The well should fill with fluid. Contact Us Home Blog FAQ's Technical Help My Account LoginRegister Examples of Carb Numbers search 0$0 Carburetor Parts by Make & Model Scroll to see more Aero Coach Carburetor Parts Alfa Romeo American Bantam American General American LaFrance American Motors Nash Rambler Auburn Audi The metering rods must be installed after the pump adjustment or when leaner than standard rods are installed. A WGD usually has a pump arm like that of a WCFB (IIRC). As the engine gains in RPM, the vacuum drops and the metering rods are pulled out of the main jet allowing more fuel to flow. When that is the case, I bend the accel. This is an electronic rebuild manual, no physical copy will be provided. A stand pipe is provided at both needle seats as an additional trap for foreign material that might prevent the needle valves from seating properly. Carter WCFB 4 Barrel Carburetor Float System. It needs about 4 lbs of pressure. Carter WCFB 4 Barrel Adjust Float Mikes Carburetor 21.4K subscribers 5.5K views 4 years ago https://www.carburetor-parts.com is providing this video about adjusting the float level and. Back out the throttle lever set screw (idle screw) to allow throttle valves to seat in the bores of the carburetor. One is in the secondary venturi and the other just above the throttle plate. With choke valve held closed and fast idle adjusting screw C, or fast idle adjusting tang, on high step of cam. a. but if it runs well you don't really need to make any adjustments. Everyone Has Started an Engine in the . Readjust idle to 500 RPM and fast idle to 1200 RPM On 1955 models set choke two points lean. Other 4 barrel carburetors such as the Carter AVS, Carter TQ, Rochester 4GC, and Rochester Q-Jet have a tensioned secondary spring. Loosen the clamp screw A Press. The piston is brass and can be damaged very easily. Pulloffs : CUFWCFB2 $ 0 . It isn't unusual for the vacuum piston on the WCFB to become frozen in the cylinder where it resides. Rebuilding Carter BBD carburetor part 3 - Duration: 5:04. As for the pump not squirting.I suspect the pump well isnt filling up. Technical Details. Procedure is as follows: with the throttle lever set screw backed out and throttle valves seated in bores of carburetor, press down on vacumeter link (D) until metering rods bottom at (E). Maximum float buoyancy is generally accomplished when the float pontoons are at a 90-degree angle to the fuel valve. The Carter WCFB and AFB designs fit easily beneath the low profile C1 and C2 hoods. What more could you ask for? Find many great new & used options and get the best deals for 19571958 Plymouth Fury Carter WCFB Carburetor *Remanufactured at the best online prices at eBay! Low fuel pump pressure always check you motors manual for the correct pressure. The accelerator pump circuit resides on the primary side of this carburetor. Eckler's Premier Quality Products 57132129 Chevy Carburetor Rebuild Kit Carter WCFB Replacement Kit Includes All Gaskets, Seals, Check Balls, Springs, Accelerator Pump & Needle Valve Read more CARTER 4 Barrel WCFB DUAL CARBURETOR KITS & FUEL FILTERS 1961-65 CHEVROLET 1955-56 DESOTO April 18, 2018 Carter Carburetors Rebuild Kits