It's been a problem from day one, choke mechanism locks up so I removed it. A hot start condition is usually the result of too much heat in the vicinity of the carburetor, fuel lines or fuel pump. Paste as plain text instead, Not the same issue on boats - if you are using the bulb every time you use the boat you are monitoring bulb condition. When installing the air cleaner, do NOT over-tighten the nut that holds the air cleaner in place as this can distort and damage the carburetor casting. While they are no longer standard, carburetors are still found on many road going cars and trucks, and are very important to the drivability and performance of the vehicles equipped with them. I have since put a fuel filter in right before the carbs and have cleaned them just like I did in this video. GM produces a car in Europe (Opel) in a plant that GM owns brings it to the states and sells it as a Cadillac Cetera. Talent and passion for what you do in any field is critical, Raymond seems to have both. If you suck water up that straw and hold your tongue against the end the straw will stay full, but when you pull your tongue away the water will fall to the level of that in the glass. When the accelerator is released the pump diaphragm sucks more gas into the pump area and the check valve in #82 keeps the metering well full and ready for the next shot. I still get sputtering even after the engine is warm (180 deg) and worst when it's frosty outside. This video goes over some simple cleaning procedures to potentially fix any idle problems and popping you may have. Guy I know brings his car over for me to investigate the cause of the car losing power on the high way. Jet sizes are usually indicated with a number stamped on the side of the jet. White is too lean, increase the jets by .002. Even if the choke is defective, a choke repair kit or a new bimetal spring should be all that's necessary to eliminate the starting problem. Another way to spot the "Similar" carburetors is that a lot of them have a black choke element - all of the Redline Webers coming from Europe have a White choke element. Another type that is becoming more popular is the DGV 38/38. 5 Weber spares every toolbox should contain, No restoration is complete until the car has been properly sorted, How to easily fit a modern battery in a classic car. 1.4k Location:Northern California Cars:Too many Datsuns Posted December 4, 2007 I have a major carb hesitation on this cold weather. Installing smaller sized jets may restore the proper air/fuel mixture and good fuel economy. It is important to watch your plugs. While this void is being filled the throttle butterfly(s) is/are opening, but without an immediate extra shot of gas and the engine hesitates until gas reaches the accelerator jets or the venturi starts sucking gas through the main jet(s). How to plan for the best restorationand what to do if it goes wrong, The bamboo skewer: an effective, inexpensive detailing secret, A cooling system is only as good as its weakest link, How to pack an effective quick detail kit, Save Your Time, Money and Sanity With These 18 Steps to an Organized Restoration. LEARN MORE. Flat rate pricing based on labor time and parts, Trusted mechanics, rated by thousands of happy car owners, Hand-picked, community-rated professionals, Over 25,000 topics, from beginner tips to technical guides, Check cars for recalls, common issues & maintenance costs, Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance. Knowledge Base Weber Weber Marine Weber Marine Troubleshooting Weber Marine Troubleshooting Weber marine runs rich or Floods The first thing you want to do is test the needle & seat for leaks. To learn the differences put "Weber Carburetor" in a search engine, find some sites, read about them, and phone the vendor if you need to. Your link has been automatically embedded. Avoid breathing the fumes. Carburetors Refer to a Weber Shop manual or contact your Weber Dealer for specifications or instructions. So turn it till it idles then make your adjustments.. Long time since my original postfound two things. Many of these copies are manufactured in China, and being direct copies means that parts are at least meant to be interchangeable. That was a lot of float bowls and once they dried out after sitting for a week or three, a lot of cranking to get the thing going and the little low pressure pump did the trick (you can plumb it in so it is a side circuit and doesn't interfere with the volume the mechanical pump wants to suck when running). If adjusting, cleaning or replacing a carburetor fails to eliminate a stalling problem, the underlying cause is likely a weak fuel pump, plugged fuel filter or fuel line, or bad gas (too much water or alcohol). Starts right up, and Ive had no more popping!Let me know if you have any questions, please comment, like the video and subscribe! This was then reorganized as Magneti Marelli Powertrain S.p.A. in 1986. Damage any gasket surfaces. Weber carb problems. If backing it out as much as 1/4 turn doesn't cure it the problem is in the accelerator pump circuit. Hard starting is another symptom commonly associated with a bad or failing carburetor. Thereafter tighten them every time you drive the car until that time they are tight at the start. REDLINE's use of the European WEBERS assures the consumer they are receiving the same high quality genuine WEBER carburetor that has gone into the conversion kits for over 30 years. Highly recommended Chokes are very sensitive, and easily misadjusted (which is why the government required the auto makers to make choke and idle mixture adjustments "tamper-resistant" in the 1980s). Is there a fuel filter and has it been changed. This would be listed, Type 32/36 DGV 5A. Sputters and back fires from the carb. The butterflies should close completely, but rather softly with only a soft click, not slam shut like a rat trap. Because its got the smallest passageways in the carburetor, so theyre the first to clog. This will cause gas to be siphoned from the bowl. The WEBER carburetor company as we know it started in 1935 in Bologna, Italy. They are normally a little thicker than the stock gasket and look like heavy gray paper. 1. The only markings on some of the "Similar" carbs are a sticker. That is the situation with WEBER carburetors today. Bigger jets flow more fuel and richen the fuel mixture. Restoration & Renovation The air/fuel mixture then flows down through the intake manifold and into the cylinders where it is burned to produce power. I have an electric pusher fuel pump right below the gas tank in my 63 Beetle, that has a fuel pump right before it. These were arranged so that each cylinder of the engine had its own carburetor barrel. Now, say we punch a pin hole in the straw. Weber Carb Kits. Refer to a<br /> Weber Shop manual or contact your Weber Dealer for specifications or<br /> instructions. Replacing the main metering jets usually requires removing the top of the carburetor or the fuel bowls. Great overall impressions. Look down the carburetor at idle. All settings are done with choke disengaged or warmed up so that the choke is fully opened and disengaged. HI, before you can do any adjustments the motor needs to idle.. so turn the idle screw to what ever the motor needs to run then do the timing adjustments and the air/fuel mixture screws .. When the accelerator is depressed the linkage acts against the lever in part #34 which in turn pushes against the pin on part #36, the pump diaphragm. And there might be a PCV issue with regard to the breather port some 38DGES carbs had. [1] Weber carburettors are made in a facility owned by LCN Automotive [4] based in Spain. This action forces gas through a passage into the bottom of the metering well which is the passage part #82 screws into. This will cause the choke to say on all the time, or too long, making the engine run rich and idle too fast. In our opinion Genuine infers two things that it is real and original. If the check ball is stuck shut, it will prevent fuel from entering the pump and there will be no fuel to pump through the discharge nozzles. '20 Kia SOUL GT-Line Turbo, '70 521(wife's). Whether you are rebuilding or replacing a carburetor, you first need to identify it. Disassemble the carbs (leave the throttle shafts and bearings in place), and put all metal parts into the carb cleaner (the cleaner will dissolve any non-metal items!). Car manufacturers regularly brand products. Double check all the fuel line, vacuum and emission hose connections, the throttle linkage and return spring, then start the engine. I dont want the new engine to run lean. Before you take a carburetor apart, find an assembly diagram in a service manual for reference. I'd then hood it to the vac adv line coming from the carb and see if there's any vac at idle. Worm-screw clamps are usually the best. A defective EGR valve that fails to close at idle or when the engine is cold can be another cause of hesitation. The automatic choke may have to be adjusted if the engine does not start easily. Ford jointly builds a car with Mazda (626 and Probe) with primarily Mazda drive train does that make it a Ford? 1970 510 Wagon, 1959 Datsun 1000 sedan, 1972 Datsun 510 LZ22, Sold. The Genuine European Webers have the trademark "W" stamped into the carburetor and are clearly marked with its origin "Made in Spain". Vehicle Engine Mechanical Inspection Cost, The statements expressed above are only for informational purposes and should be independently verified. Check float level - while you are at it test the float for leaks. Air can even get into the manifold past badly worn valve guides and seals. The same goes for the choke linkage if it is dirty or damaged. If the jets or idle circuit inside the carburetor are dirty or gummed up with fuel varnish, they won't flow enough fuel causing the Air/Fuel mixture to be too lean. OK, here we go. If you are installing a performance carburetor, the main metering jets that come in the carburetor may or may not give you the best air/fuel mixture. | From the Nov. 2020 issue If all that is needed is a new float, there is no real need to replace the entire carburetor. Be sure it says REDLINE to assure you that your "genuine" European WEBER carburetor is tuned and jetted for the absolute best value your money can buy. #1 Have a question. If necessary, draw a picture of the hose connections, or place a piece of masking tape on each hose and write on the tape which hose goes where. Inside the choke housing is a coiled bi-metal heat-sensing spring that contracts when it cools and expand (unwinds) when it gets hot. A flooded engine may not start because the plugs are wet with fuel. Consumers should be aware that what this company is doing is importing a Solex designed carburetor from South America branding it a Weber and calling it a Genuine Weber. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Another option to consider if your carburetor needs to be replaced is to upgrade to an Aftermarket Fuel Injection System. If it doesn't hold, the level of gas in the metering well will fall. The pump forces gas through a passage to the metering well, up through the check valve, and out the jets. It's pretty stupid how brand new Weber does this. Floats are not part of a rebuild kit, so if new gaskets are also needed, a rebuild kit will have to be purchased, too. How did the dirt get there? upgrade to an Aftermarket Fuel Injection System, Bad Gasoline Can Cause Performance Problems, AA1Car Automotive Diagnostic & Repair Help. Percolation can be a problem especially if the engine is running hotter than normal. Part #82 is not only a screw securing part #81, the accelerator jets, but has a check valve built into it. How Does the Carburetor Work Within the Fuel System? Rebuilding or replacing the carburetor may be necessary. A rich choke is indicated by blubbering and lumpy idle when the engine is cold. Don't blame the carburetor if the real problem is a lead foot on the accelerator pedal , or the engine has low compression, retarded ignition timing or an exhaust restriction (plugged converter). The system "learns" the best settings as you drive and makes the necessary adjustments so you get good cold idle smoothness, great throttle response, and usually better fuel economy and performance than what you had before. A carburetor uses intake vacuum to pull fuel through its metering circuits. Air leaks elsewhere on the engine can also lean out the fuel mixture. This helps offset the extra gulp of air that is sucked in until fuel flow through the metering circuits can catch up to the change in air velocity through the venturi (the narrow part of the carburetor throat). If the carburetor needs work, it can be rebuilt with a kit or replaced with a new or remanufactured carburetor. Just tighten them normally during installation and again after the engine has ran to operating temperature and cooled, it doesn't have to be dead cold. Another symptom commonly associated with a problematic carburetor is black smoke coming from the exhaust. The left and right sides could be different sizes. http://www.redlineweber.com/html/Tech/3 unning.htm, https://www.youtube.com/watch?v=XIw--72EKU0. The weber is a bit over jetted from other articles I've read, but it shouldn't be sputtering. ), low compression, even a weak starter or battery. Once the RPM starts to drop, turn the screw back out 1/4 turn. They should be within 1/32" of being the same thickness. An Overview and . The screws will get scored if you turn them in too hard.Turn the screws out 1 1/2 to 2 turns which is a good place to start.After the engine is warmed up and at idle RPM: I have a 9600 Weber for my 95 stingray with a 4.3. Also test the throttle linkage to make sure the throttle opens all the way when the gas pedal is floored, and that nothing binds or rubs against the linkage that might cause it to stick. So how do you like that adjustable PCV valve? All rights reserved. Do NOT over-tighten the fasteners as doing so may warp or crack the carburetor base plate. CB has a large selection of Original WEBER Carburetors (made in SPAIN) in a range of sizes to fit your desired application. pl521sss, Jet size is based on choke size, and choke size is just based on engine displacement, RPM and application. Fuel will drain back in the line, leaving an air pocket the mechanical pump can't overcome, so I must discomnnect the hose at base of the Weber DGMS and suck gas up. A proven carburetor with a track record extending over 30 years. If the plugs have heavy black, sooty carbon deposits on the electrodes, the fuel mixture is too rich. That check valve in #82 works the same way. Decided to connect the vac hose to distro and it helped with the hesitation but problem still there. Now for the gasket. When we think of WEBER carburetors this is the company that we refer to. If you suspect this try starting with the throttle wide open to give the engine more air. Language links are at the top of the page across from the title. I'd get a vac pump like a mightvac and check the vac advance mechanism on the dizzy. If you have an account, sign in now to post with your account. Made with in Silicon Valley. They wont cause flooding, but can cause richness. So before the carburetor is rebuilt or replaced, these other possibilities need to be investigated an ruled out. YourMechanic All rights reserved. I checked for vac leaks, none that I can tell. Otherwise, the vac adv hole is exposed at idle or too soon and it completely messes up your vac adv signal. That was the first job to do, and I fitted a manual choke conversion. Fiat assumed control of the company in 1952 following Weber's disappearance in 1945. You should have the system pressure tested to see if the head gasket is leaking to Get a fair & transparent quote instantly before booking. Flooding may also be caused by excessive heat in some instances. The motor may have failed because a vacuum leak caused it to overtax itself in a vain attempt to compensate for the unwanted air. Lay the parts out on a clean work bench, paper or metal tray. If you're using an early exhaust manifold the regular stock manifold gasket will work fine, just be sure to install it with the metal side facing the manifolds. The adj directions on the Redline weber site should be followed closely. , That's why we've put together the Weber Carb Buying Guide below to help you choose the right features and installation . For small engines, even only one half of the carburetor was used, with the other half blinded and partially cut off. The info you have is wrong. The first thing you want to check is the thickness of the securing flanges on the intake manifold and exhaust manifold/header. NEVER: Allow any dirt in the carburetor. How to Prevent and Handle an Overheated Engine, Symptoms of a Bad or Failing Air Bleed Housing Assembly, Symptoms of a Bad or Failing AC Condenser Fan, Symptoms of a Bad or Failing Low Water Sensor, How to Troubleshoot Car Overheating Causes. WARNING: Flooding can be a very dangerous situation because it creates a serious fire hazard if fuel spills out of the carburetor onto a hot engine. Though the basic operation of a carburetor is fairly simple, it also relies on a number of add-on devices for cold starting, idle control and emissions. The carb has to correctly add the right amount of fuel for all situations: cold, hot, travelling over violent bumps, when pulling high g-forces: turning/braking/accelerating, with engine vibrations, when idling, when racing, when cruising through town or along a highway, when operating high in the mountains or at sea level. It may not display this or other websites correctly. A cold engine needs a very rich mixture to start, so if the choke isn't working it will suck too much air. If the float is brass, shake it to see if there is any liquid inside. What would cause my car to rev up and down and overheat immediately. I tend to agree with wspohn. I have dealt with many Mechanics in my day Raymond is one of the best. These carburetors were originally designed and engineered by the Weber Carburetor company in Italy. *Note: I noticed something missing from the illustration. That check valve in #82 works the same way. At idle, the fuel enters the carburetor throat through one or small small idle ports just above the throttle plate. A small hairline crack in the seam can allow fuel to seep into the float, causing it to sink and flood the engine with too much fuel. suck the water up, and try to hold it, We can't because of the air leak and that same thing happens in the carburetor when the check valve in #82 is working properly, but #82 isn't tight or the gaskets #80 are leaking for any reason. A carburetor can also flood if the float inside the fuel bowl is set too high or develops a leak and sinks (this applies to hollow brass or plastic floats primarily). If the carburetor has any sort of issue that disturbs the air fuel ratio it may result in hard starting. The carburetor may flood if dirt enters the needle valve and prevents it from closing. What rpm is your idle set to? A heat riser valve on a V6 or V8 engine that sticks shut may create a hot spot under the intake manifold that causes the fuel in the carburetor bowl to boil over and flood the engine. The operation of the accelerator pump can be checked by removing the air filter, looking down into the carburetor, and pumping the throttle. 1. They should burn tan, or brown. I have a major carb hesitation on this cold weather. Stalling can also be caused by air and vacuum leaks in the carburetor itself (leaky gaskets and seals) between the carburetor base plate and intake manifold (bad base gasket), or in any of the vacuum hoses that connect to the carburetor or intake manifold. 2023 No more idle circuit problems. Interchangeability works in both directions, as internal parts may also be swapped for original ones. Not only does the rubber boat bulb look a bit Mickey Mouse, it can't be a very safe mod. This is the problem with branding (licensing) a product the consumer may be buying something they believe is one brand when in fact it is made, designed, and or engineered by a different company. let the throttle close and don't touch it until you're finished setting the choke. I have an electric pusher fuel pump right below the. Both companies can be owned by the same parent company but are they the same? Hesitation or misfiring under load can also be caused by a weak ignition coil, or cracks in the coil or distributor cap, or bad spark plug wires. To open a printable PDF version of this instruction CLICK HERE This is a much debated topic, but mostly among those selling what can only be described as a "Similar" carburetor. Normal, so I understand is 125. ..hhmmm..does your area add ethanol to the gas in the winter??? While this void is being filled the throttle butterfly(s) is/are opening, but without an immediate extra shot of gas and the engine hesitates until gas reaches the accelerator jets or the venturi starts sucking gas through the main jet(s). And now thinking if the jets are incorrect but according to this write up, it may not be the problem. Ours does and it's very common for fuel filters to plug up causing grief with carbs. Built in Europe to the same exacting standards that only the original European Weber carburetors can deliver on. Adjust the idle speed and idle mixture adjustment screws after the engine reaches normal operating temperature. [1] The company was established as Fabbrica Italiana Carburatori Weber in 1923 when Weber produced carburetors as part of a conversion kit for Fiats. At higher engine speeds, fuel is pulled through the main metering jets into the venturi (the narrowest part of the carburetor throat). Continuing that line of reasoning they claim they are genuine and they may in fact be legally. On the whole, I would think that installing a small flow through electric pump would be a better option for priming. In 1986, Fiat also took control of Weber competitor Solex, and merged the two into a single company (Raggruppamento Controllo Motore, or the "Engine Management Group"). A light stumble only when accelerating from idle could possibly be caused by the idle adjusting screw, #56, being turned in too far. Carburetors are mechanical devices that blend fuel and air into a suitable mixture that can be ingested for internal combustion by an engine. I don't care what Weber says there is a lot of variables to make a motor idle. The float bowl vent is plugged somehow. I actually try to empty my Webers on my D-Type replica by turning off my electric pump while the engine is still running. Having that happenson a car with electric pump would be very bad with gas spraying all over. Once warm return to idle and adjust the mixture screws to achieve the highest rpm. Carburetor kits may or may not include an assembly diagram and instructions. The choices are: The Original Italian designed and European Built WEBER or the carburetors that are "Similar" from other places with the cheaper price. But are they Genuine? Upload or insert images from URL. Note: Your post will require moderator approval before it will be visible. One of the first symptoms commonly associated with a bad or failing carburetor is a reduced engine performance. Weber Carburetors is an automotive manufacturing company founded in 1923, known for their carburetors. If the shaft that opens and closes the choke is dirty, it may cause the choke to stick. [3] Genuine Weber carburetors were produced in Bologna, Italy, up until 1992, when production was transferred to Madrid, Spain, where they continue to be made today. Open the throttle and turn the choke housing until the choke butterflies, #5, close. It is interesting to note that at Magneti Marelli's website the founding of the Weber carburetor was to eliminate having to buy carburetors from the French Solex carburetor company. Don't cut the flanges thinner on the aluminum intake to get a match, you could weaken them to the point of causing them to break, grind the outside of the exhaust flanges if they are to thick. You could have debris in the carb from dirty gas if you didn't have a filter in the line..but I'm guessing you do. If a carburetor throat doesn't seem to respond to any changes in the idle mixture screw, then this is a clear indication that the idle jets may be clogged, or your carburetor may need rebuilding. Let's try and expose some of the deep dark mysteries of the Weber DGV carburetor: The most common problem you may possibly find with a Weber DGV is hesitation upon acceleration, but I have never experienced it in 24 years of combined use of 2 vehicles equipped with them. Part #82 is not only a screw securing part #81, the accelerator jets, but has a check valve built into it. Any problem with the accelerator pump diaphragm itself will show as a gas leak at the cover #34 and the diaphragm will have to be replaced. A Clean engine will make all work easier, accurate, and safer. Shop Work The Similar carburetors are easily distinguished from the European Weber by several characteristics: We hope to clear some confusion by different merchants claiming they are selling Genuine Weber carburetors.
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