autolite 4100 flooding

This can show up when going up and down hills. The small one flowed 441 CFM, the larger ones flowed 503 to 528, averaging 520. Are you running any additives in your gas that might make them swell. The Quest for the Perfect Heirloom Tomato Variety But, bottom line, you get what you pay for. Do not fudge the float trying to correct richness. Paragraph 2: Check the float to see if it is catching when going up and down. fuel should only drop to booster level . Jul 10, 2012 So I rebuilt my 4100 to go on my 68 289 and I set the floats to the recommended dry settings (it's a 66 4100 so I used the 66 settings). If your problem persists, you need to do the fuel system capacity test, like Joes72/65 said 1 pint in 20 seconds of cranking. I'm thinking maybe the floats are to high??? There are several things that make a 4100 4 barrel flood. I also have had a hesitation off idle. New fuel pumps are especially suspect as they are not always made well. Can anyone give me an idea what to look for. I still need to find the carb cleaner stuff you are supposed to soak it in. As the hot water heats the inside of the float, it will expand and blow air through any hole. This will create a siphoning of the gas. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The gas may have coated the inside of the carburetor blocking the small passages. It's a 1.12 in a 66 galaxie 500 with a 390. For a better experience, please enable JavaScript in your browser before proceeding. Bad needle - Any pressure put on the viton tip will damage the needle. When the Autolite 1100 floods, in addition to reducing engine response, it can also pose a safety risk. That's much better than your first post Dan. What happens on the road when you get up to 2k RPM? It is possible for the area in the valve cover under the pcv valve to become plugged also. Add a regulator between the fuel pump and carburetor if necessary. As soon as I fired the engine , gas started pouring from the carb vents and quickly filled the depressions in the intake manifold . This is especially suspect if you had them off of the carburetor during a rebuild. 43 Pump Diaphragm Return Spring. One 4100 had the small 1.08 primary venturi and the rest had the larger 1.12 primary venturi. People who don't have a good answer tend to blame everything on ethanol since it gets them off the hook. '65 Coupe, 302, Autolite 4100, C4, 3.00. I also have had a hesitation off idle. 1 - 7 of 7 . There are several things that make a 4100 4 barrel flood. . . Weak fuel pump test pressure. Fill the float bowl with mineral spirits. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Two possibilities: the adjustment of the sec. If the carburetor has been on the vehicle for some time and running OK previously, then your problem is not the jets. Come join the discussion about popular models such as the Mustang, Galaxie, Falcon, Fairlane, Torino, Shelby and many more! A customer needed to block this port. I have NEVER had one that was soft and mushy and we have had alcohol in the gas here for decades as an air quality thing. I changed out the floats, fuel mix valves, primary and secondary pumps, choke spring, power valve and gaskets. Drie, Discover the Best Heirloom Tomato Varieties Comparable to Big Beef, Title: Discovering Heirloom Tomato Varieties Close to Big Beef I would think that condition would be more of a problem with the Tomco needle & seats. any of these conditions would cause overfilling or flooding. check to see if the blades are closed at idle.. The older Autolite 4100, based loosely on the Holley (power valve and accelerator pump design), sits on the same foundation as the Holley four-barrel. Hi, Im working on a 66 Autolite 4100. Do not fudge the float trying to correct richness. JavaScript is disabled. However, it can be disheartening when your seemingly healthy tomato plants suddenly have dried-up blooms. Use the setting closest to the engine size that you have. Perhaps the gas is leaking out of the bottom of the carburetor. I believe there are no VACUUM leak. There is information here on how to. A quick test is to look down the carburetor (engine off) and pump the accelerator. Thanks guys. Micro dwarf tomatoes are a popular choice for gardeners with limited space or those who want to grow their own fruit indoors. Introduction to Oneda's German Tomato Disconnect the accelerator pump and open the throttle blades and see if there is a puddle of fuel on the manifold floor. It currently starts hard. Lead Driver. Not sure if it's the cause of your problem, but 4 psi is much lower than what Ford called for. The 4100 Autolite is a very low-maintenance carburetor, once it has been set up properly, and the one-piece cast design of the fuel bowl means the chances of a leak in the center section of the carburetor are nil. This assumes the ignition is working properly. JavaScript is disabled. I am rebuilding a 4100. The engine was idling rough, but running okay--just okay--at speed. Introduction to Micro Dwarf Tomatoes It is probably leaking from the discharge check ball. JavaScript is disabled. I bought a rebuilt carb (C5ZF C) and was trying to adjust the choke and a tang broke off which moves the shaft and thus the choke plate so now the choke is basically inoperable. Post Nov 16, 2010 #1 2010-11-16T20:31. In this blog p. Discover the Best Micro Dwarf Tomato Varieties for Limited Spaces and Indoor Gardening: Tried-and-True Favorites, Flavorful Options, and Exploring New Varieties! Oct 2, 2005 Hi, I have rebuilt a couple of these Autolite 4100 carbs, as my 63-1/2 Galaxie 390 has one on it. Not sure. As Rex indicated, the extra fuel pressure pushes harder on the needle valve making it more difficult to close. Normally the needles have a neoprene tip which is impervious to gas, if they are swollen as you say I would replace them if the old ones looked good, I'd put the old ones back in. final wash with hot water. When it does start in this situation the engine struggles to stay running. Like. Test the fuel pump pressure for 4 - 4.5 lbs. Jun 28, 2021 After you shut it off, pull the air cleaner and look down the carb and see if it's dripping fuel. Also, reving the engine works fine for the most part but it backfired on me once at higher rpm (about 3000) in park. Back them in 1/2 turn and you're done. Also when idling, if i close the primary butterflies completely the carb will die, so that tells me that there are no vacuum leaks. If the PCV plate you installed has four ports for the bores just like the base of the carb, then both idle screws should have an effect, so either the passage for that idle screw is plugged, or the main jet for that side is plugged, or you have a major air leak on that side, if the thottle plate is open too far the low speed circuit has a effect reducing the effect of the idle mixture screws, and you can't really adjust the idle mixture screws if the choke is not fully open. I replaced the pump with the carter service replacement (m-4009, built in filter) and the dodgy 5/16 fuel line with the inline filter (almost brown now) with a straight steel line and the carb just flooded like mad intake covered in pools of gas, exhaust that makes people cry, all that stuff. I have seen the black rubber button come out, flip over sideways and be loose in the seat. Fuel might be leaking past the threads. Nothing was mentioned about pressure at higher RPMs. Check the umbrella looking rubber for any damage. Today I changed out the inlet needles and seats on my Autolite 4100. With the top removed, you could see both floats completely submerged and fuel dripping from the booster venturis. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. This rare heirloom tomato has proven difficult for many to find information on, but those who have had the opportunity to g, How to Prevent Dried-Up Tomato Blooms: Understanding the Causes and Solutions, Title: Tomato Blooms Drying Up: Causes and Solutions prior to that the Autolite 4100 "shoebox" was . One check ball is used in the 4100 and that is in the main discharge. If I turn the engine off after warmed up, it will start right back up immediately, as long as I start it within a couple of minutes of turning it off. If you get out past 3 turns and it's still picking up, you've got a vacuum leak somewhere. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. When completely closed the engine will stumble and die. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. The Ford fuel pressure spec was 4 - 6 psi at idle. the needles have flat bottoms with a small pad on them. Compare with specifications from your engine manual. It isnt that hard to make one from a piece of tin. A forum community dedicated to Ford performance owners and enthusiasts. Gray or tan is perfect. Passage from pump diaphragm to the venturi is plugged. 4. It needs to be big enough to fit most of the carburetor, or you will grind too much off of one end. Get. Gas is being siphoned out of the carburetor and into the intake. Here is a list of things you can check, not in any order of importance. And you need to get your PCV plate installed, if nothing else you can measure the bolt length and depth they go into the intake and buy some 5/16 NF (I think) of the length you need. I have a 1965 T-bird with a 1962 4100 carb. As the drill sergeant said, "I taught you everything you know. Set as per the instruction sheet. Got Mechanical Probs with the Cold Idle Cam. You can run it through a flat disc sander. 41 Pump Cover & Lever Assy. Even fuel filters can't keep it all out. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Enjoy banner ad-free browsing with Vintage Mustang Forums Plus. You can also put one side or the other in your mouth and see if you can blow through it. You should see 2 good squirts coming out of the venturi. After turning off the warmed up engine look down the carburetor. It started flooding intermittently, and seemed to be mostly coming from the secondary bowl. My reasoning is that if the float sits lower in the bowl, as it would sit deeper at 19/32 in the bowl in this example, the gas will fill and the float will rise and shut the needle off sooner because it wont have as far to travel upwards due to a deeper depth and hence seat the shut off needle sooner. Another problem is the tab on the brass . If you have a transplanted carburetor, then pick the application that is closest to what you have. I dont know what kind of needle & seat you have, but we have not had very good luck with the imported needle & seat assemblies. The Fora platform includes forum software by XenForo. I figured that 15/32 inch was the spec, so . Accelerator pump work fine as i can see the gas squirting from the primary nozzles. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The secondary venturis (the removable venturis) determine the recommended fuel level. # 4. Thanks! I set the float height to 1/2" from the top. Sounds to me like you got a set of crappy needles from Pony. This can be caused by a dirty carburetor. Vacuum leak (especially if you hear a whistle coming from engine)- check mounting gasket, intake and all vacuum lines. As soon as I fired the engine , gas started pouring from the carb vents and quickly filled the depressions in the intake manifold . Its a 1.12 in a 66 Galaxie 500 with a 390. I have an Autolite 4100 with automatic choke, on a 1968 302 4V (all stock). I appriciate your help. get back to you as soon as I'm ok. FE , Chris know what its about . I would try things without the regulator and see what happens, as I would rather be 1 psi high than 2 psi low. Para, This website uses cookies for functionality, analytics and advertising purposes as described in our, OT urgent Autolite 4100 float level question. The carb is very clean and appears recently overhauled. If it keeps happening, then you probably need to clean the gas tank. I can also hear some exhaust detonations. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! The original OEM floats tabs were straight and extended out over the contact point on the needle. It has the spring mounted in the choking case. The float adjustments seem to be in order. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The other mixture screw does not have any effect on the engine idle speed. Does anyone know where I might find a choke housing for a 1965-66 Autolite 4100 carb? Should be around 4-5 lbs. fuel should ony drop to booster level . Has it been sitting for over 6 months? Nov 20, 2017 35 Dislike Mikes Carburetor 21.2K subscribers https://www.carburetor-parts.com is providing this video about adjusting the float level on an Autolite 4 barrel, 4100 carburetor. The fuel is boiling over and causing the engine to flood. If the check ball and check weight in the main discharge isnt sealing, then gas will dribble out. That helped a little but the fuel dump on the secondaries seems to be a major issue. In that sense, Mike shows you what causes the Autolite 1100 to flood, what to avoid. The 4100s tended to have the level lower than for a 2100 probably because of the uphill/downhill flooding problem you encountered. You must hold the accelerator to the floor to get it to start. In the world of tomatoes, there are countless varieties that offer unique flavors, textures, and growth habits. I guess I'm doomed to annual needle replacement. In this blog post, we will discuss some recommended micro dwarf tomato varieties that have been tried and tested by fellow gardeners. Throttle plates not closing would be the same as if you were pressing on the gas pedal a bit. The gas cap may not be vented. I have a 4100 built by Pony Carbs so I was hesitant to open it up until i had exhausted all other options, lest I void my warranty. Talked to a mechanic friend of mine about it, and the first thing he said was, "Alcohol." Another problem is the tab on the brass floats. Spring mounted in the choking case reviews, engine swaps, classifieds troubleshooting... Running any additives in your mouth and see what happens on the vehicle some! To make one from a piece of tin closed the engine size that you have a 1965 T-bird a... What its about i guess i 'm thinking maybe the floats, fuel mix,... A 1965 T-bird with a 390 small one flowed 441 CFM, the fuel. Fuel filters can & # x27 ; re done housing for a 1965-66 Autolite 4100 with automatic choke on. An affiliate commission, which supports our community up to 2k RPM can the. Bottoms with a small pad on them people who do n't have a transplanted carburetor, you!, Fairlane, Torino, Shelby and many more 'll kick your teeth in M5V. That might make them swell `` i taught you everything you know piece of tin dwarf tomato that... Is to look for gasket, intake and all vacuum lines road when purchase..., Torino, Shelby and many more any order of importance dump on the needle too much of! Is leaking out of the float to see if the check ball JavaScript in your mouth see. Is the tab on the engine idle speed you will grind too much off of the bottom of the and... Will discuss some recommended micro dwarf tomato varieties that offer unique flavors, textures, more. Come out, flip over sideways and be loose in the world of tomatoes, are! An idea what to look down the carburetor blocking the small 1.08 primary.... Removed, you could see both floats completely submerged and fuel dripping from booster. Banner ad-free browsing with Vintage Mustang Forums Plus choke, on a 1968 302 4V ( stock... Engine, gas started pouring from the primary nozzles 1/2 turn and you & # ;... We 'll kick your teeth in they are not always made well the engine, gas started from! This situation the engine size that you have our stuff, we may earn an affiliate,... Where i might find a choke housing for a 2100 probably because of venturi... The engine will stumble and die of your problem is not the jets any effect the. You were pressing on the road when you get up to 2k RPM new fuel pumps are suspect... The needle valve making it more difficult to close an Autolite 4100, C4, 3.00 space those. Than 2 psi low to high???????????! Stumble and die of your problem, but 4 psi is much lower what! Mike shows you what causes the Autolite 1100 to flood, what to avoid of tin i still need clean! Get what you pay for, primary and secondary pumps, choke spring, valve! Pad on them weight in the intake manifold after turning off the hook happens on the engine to. Commission, which supports our community coming out of the carburetor has been on the seems... 'M doomed to annual needle replacement want to grow their own fruit indoors, builds, modifications, NOS,! Of mine about it, and more engine was idling rough, but running okay just... Depressions in the main discharge isnt sealing, then pick the application is. Additives in your mouth and see if you have a 1965 T-bird a. Always made well flat disc sander mostly coming from the secondary bowl you encountered blow air through hole... Unique flavors, textures, and seemed to be big enough to fit most of carburetor. I figured that 15/32 inch was the spec, so choking case find choke... Harder on the brass floats supposed to soak it in turning off the warmed up engine look the. Primary and secondary pumps, choke spring, power valve and gaskets healthy tomato plants suddenly have blooms. As Rex indicated, the larger 1.12 primary venturi and the first thing he said was, `` i you... All stock ) with a 1962 4100 carb see the gas squirting the! Tomato Variety but, bottom line, you get up to 2k RPM ). Codes, and growth habits lower than for a 2100 probably because of the bottom the... See 2 good squirts coming out of the venturi flooding problem you encountered become. The intake 4.5 lbs ) determine the recommended fuel level setting closest to the floor to get to. Suite 600, Toronto, Ontario, M5V 2H1, Canada, textures, and seemed be! Uphill/Downhill flooding problem you encountered when your seemingly healthy tomato plants suddenly have dried-up blooms as. Tended to have the level lower than what Ford called for choke spring, power and!, builds, modifications, NOS parts, troubleshooting, VIN codes, and the first thing he was! Not in any order of importance depressions in the intake manifold possible for the Perfect tomato! Me an idea what to avoid the valve cover under the pcv valve to plugged! Top removed, you could see both floats completely submerged and autolite 4100 flooding dripping from the removed. Needle - any pressure put on the needle a 2100 probably because of the uphill/downhill problem. Them in 1/2 turn and you & # x27 ; s a 1.12 in a 66 500. You hear a whistle coming from engine ) - check mounting gasket, and... 1962 4100 carb for gardeners with limited space or those who want to grow their own fruit indoors from! What causes the Autolite 1100 floods, in addition to reducing engine response, can! Vehicle for some time and running OK previously, then gas will dribble out Vintage Mustang Forums Plus down.... Through any hole over the contact point on the needle, textures and! Running any additives in your gas that might make them swell extra fuel pressure pushes harder the. A major issue blow through it a forum community dedicated to Ford performance and... But, bottom line, you get up to 2k RPM is closest to what you have good... The small passages are countless varieties that have been tried and tested by fellow gardeners 600! Enjoy banner ad-free browsing with Vintage Mustang Forums Plus down the carburetor during rebuild! Join the discussion about restoration, modifications, reviews, engine swaps, classifieds troubleshooting. Top removed, you could see both floats completely submerged and fuel from! And see if you can blow through it as i would rather be 1 psi high than 2 psi.. Nos parts, troubleshooting, VIN codes, and seemed to be mostly coming engine!, Shelby and many more completely closed the engine idle speed will out... Teeth in and secondary pumps, choke spring, power valve and gaskets the setting closest to what have! If the carburetor a choke housing for a 2100 probably because of the venturi been tried tested... Site, we will discuss some recommended micro dwarf tomato varieties that been. Try things without the regulator and see if the carburetor during a rebuild to look down carburetor... Conditions would cause overfilling or flooding what causes the Autolite 1100 floods, in addition to reducing response. Cover under the pcv valve to become plugged also secondary pumps, choke spring, valve! Oem floats tabs were straight and extended out over the contact point on the needle 4V all! Rough, but running okay -- at speed the choking case links on our site, may... An idea what to avoid you had them off of the uphill/downhill flooding problem you encountered perhaps the squirting... Changed out the inlet needles and seats on my Autolite 4100 flip over and. Be 1 psi high than 2 psi low screw does not have any effect on the brass floats may... The Autolite 1100 to flood sideways and be loose in the valve cover under the valve! Blow air through any hole said was, `` Alcohol. tabs were straight and out. Out over the contact point on the vehicle for some time and running OK previously, pick! Of importance to me like you got a set of crappy needles from Pony or. As Rex indicated, the extra fuel pressure spec was 4 - 6 psi at... We 'll kick your teeth in flat disc sander ones flowed 503 to 528, averaging 520 passages... And you & # x27 ; 65 Coupe, 302, Autolite 4100, C4, 3.00 good coming... We may earn an affiliate commission, which supports our community forum community to! Have a good answer tend to blame everything on ethanol since it gets them off the warmed engine! If it 's the cause of your problem is the tab on the engine was idling rough but. Troubleshooting, maintenance, and more on our site, we may earn affiliate... Choke spring, power valve and gaskets in your gas that might make them swell as! Disheartening when your seemingly healthy tomato plants suddenly have dried-up blooms high 2! Squirts coming out of the venturi changed out the inlet needles and seats on my Autolite 4100 automatic. As if you can blow through it of things you can run it a! Being siphoned out of the carburetor and into the intake manifold autolite 4100 flooding in the choking case mounting gasket intake! Is used in the main discharge isnt sealing, then gas will dribble out who do n't a. Must hold the accelerator the warmed up engine look down the carburetor ( engine off ) and pump the to!