(Keep in mind this is only adjusting the idle mixture. I have bought the 1 inch spacer with PVC hookup but did not install it yet since i am waiting to receive the longer carb studs. Been struggling to get my autolite 4100 to idle smoothly. In Texas Auto Zone sells Chemtool in gallon cans, comes with a basket inside for soaking parts. If I wait 10 minutes or more, it struggles to start and acts like its flooded. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Back to the problem with the carb . any of these conditions would cause overfilling or flooding. Good Luck. I appriciate your help. Heat up some water just prior to boiling and immerse the float. On of the beauties of the 4100 is the engine can run with the top of the carb off, this allows watching the floats and needles and seats, to see if it is flooding or the fuel level is too low, there is also a wet float setting, that is take about a 1/8" from the edge of the fuel bowl because fuel creeps up the side. Back them in 1/2 turn and you're done. Fuel line restriction non injection fuel line can get eaten by ethanol and/or collapse inside. Currently, it idles at about 800 RPM. 4. The baffle you refer to is used to keep the heat in the choke thermostat. When it does start in this situation the engine struggles to stay running. If your problem persists, you need to do the fuel system capacity test, like Joes72/65 said 1 pint in 20 seconds of cranking. Fuel might be leaking past the threads. . 1 - 7 of 7 . In December 2002 I took five of them in a local speed shop and put them on Superflow 1020 flow bench. Your C5AF-AC is from a 390, automatic car with PCV system and its original jets were as you indicate: 49 and 60. However, it can be disheartening when your seemingly healthy tomato plants suddenly have dried-up blooms. in looking and listening to my carb yesterday, i feel that i need to set my air fuel mixture.still running a little rich. Go to NAPA or wherever and buy them for something like $2 each. (Probably more like 250 more, actually if you assume about 350 for a new Bogolly or Edleflood.) 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! In the world of tomatoes, there are countless varieties that offer unique flavors, textures, and growth habits. Check any vents on the carburetor top. I also have had a hesitation off idle. It needs to be big enough to fit most of the carburetor, or you will grind too much off of one end. Refer to your instruction sheet to get the float level measurement. It currently starts hard. The Autolite 4300 carburetor was introduced for 1967 as an immediate replacement for the 4100. The fuel is boiling over and causing the engine to flood. When slowly increasing RPM to let's say 2000 RPm and holding it there, car will run for 4 seconds then start to loose power and stall. Come join the discussion about restoration, modifications, NOS parts, troubleshooting, VIN codes, and more! Sent from my iPhone using Tapatalk 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. JavaScript is disabled. It is an Autolite made by Holley for Summit. Be sure there is a check ball and check weight. The 4100 from Pony carbs costs almost twice what any of the aftermarket carbs cost. There are several things that make a 4100 4 barrel flood. A forum community dedicated to Ford Mustang owners and enthusiasts. I have used propane around the base of the carb and intake manifold without RPM change. One idle screw not doing anything sounds like the passages are plugged on that side. You can leave it out. I have done complete rebuild of my autolite 4100. is this correct and are they available? I have a 1965 T-bird with a 1962 4100 carb. '65 Coupe, 302, Autolite 4100, C4, 3.00. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! Reply Like #11 03-26-2014, 07:00 PM F-250 restorer. 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). I believe that working PCV valve should open at the vacuum from the engine to the carb spacer but remain closed if you try to push air trough it the other way. Reduce by .002, white is lean and the jets should be increased by .002. See if it drains out. :yup: I expected some leaning but not nearly as much as measured. Enjoy banner ad-free browsing with Vintage Mustang Forums Plus. Add a regulator between the fuel pump and carburetor if necessary. Update - I talked to Pony Carburetors and at first they thought it could be fuel additives. For a better experience, please enable JavaScript in your browser before proceeding. The problem. JavaScript is disabled. If you see gas seeping out of the main discharge, then you found the problem. There is information here on how to. The discharge may be leaking. NAPA or most auto parts have it . As Rex indicated, the extra fuel pressure pushes harder on the needle valve making it more difficult to close. Bad needle - Any pressure put on the viton tip will damage the needle. If it keeps happening, then you probably need to clean the gas tank. I can also hear some exhaust detonations. from 14 to 15:1. It would be nice to have the baffle, but they are often left out because they are unavailable. I had a similar problem with a Holley 4 barrel, the secondaries were dripping fuel after shutdown until the bowl was almost empty and causing a flood. I have used propane around the base of the carb and intake manifold without RPM change. This is an Autolite 4300 (or a variant) made from '67 and up..prior to that the Autolite 4100 "shoebox" was the 4V you got unless it was (usually) Holley equipped. Today I changed out the inlet needles and seats on my Autolite 4100. Most likely the float level is not correct. .Add: dont forget the floats . This will usually stall the engine. http://www.fordmuscleforums.com/galaxie-pages/472338-autolite-4100-1-12-c4af-dg-rebuild.html. Here is a list of things you can check, not in any order of importance. Hi, Im working on a 66 Autolite 4100. With the top removed, you could see both floats completely submerged and fuel dripping from the booster venturis. Immerse the float. In fact, the 4100, depending on how you size . JavaScript is disabled. Black 1967 Fairlane GTA convertible restoring to stock. A forum community dedicated to vintage Ford Mustang owners and enthusiasts. Did you install a new kit? . Too much fuel in the float bowl. You are flooding (getting too much gas in the float bowl). Get. I am still not sure what the float level should be as the engine in my 1975 truck came out of car? Happens often on classic cars because they sit so much. Lead Driver. The carb is very clean and appears recently overhauled. eschober. Oct 08, 2007 #1 Been struggling to get my autolite 4100 to idle smoothly. flip over sideways and be loose in the seat. They don't all of a sudden change size. 41 Pump Cover & Lever Assy. However, some gardeners prefer heirloom tomatoes due to their historical significance, seed-saving capabilities, and diverse characteristics. A good re-builder will re-surface a carburetor flange when rebuilding. This issue can occur even if you've been watering them properly, using fish emulsion as fertilizer, and maintaining healthy plant growth. I rebuilt the unit with an overhaul kit from Mike's Carburetor so everything inside is new. Set to specifications. When warped fuel can slop over the bowl edge and into the carburetor bore. 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. throttle plate opening will nor effect fuel drip out of booster , if it did you would be able empty the bowl just by pressing on the (motor off) gas pedal . . Sounds to me like you got a set of crappy needles from Pony. Latrobe, PA (Mister Rogers' neighborhood), http://arrc.epnet.com/autoapp/9060/9060CH5_Carburetor_Assembly.htm, http://www.mustangmonthly.com/howto/mump_1012_autolite_4100_carburetor_installation/index.html, (You must log in or sign up to reply here. I used a 1" phenolic spacer under the carburetor to insulate it from the heat of the intake manifold. Do not fudge the float trying to correct richness. It has the spring mounted in the choking case. If you got 2 in the carburetor kit, then put the larger one in the main discharge. . 67 Coupe 289 - TCI C4 w/2k stall; Holley 4150 570cfm; Performer intake; mild cam; Pertronix HEI; 302 heads; Roller Tips; Hedman Tri-Y headers; H-pipe w/Flowmaster 40's; 9 in posi 3.50; 205/50-17F; 225/50-17R. A warped carburetor body will cause this problem. Unfortunately, I am pretty sure it also works the other way in hot weather to lower AFR on unusually warm days. The result is that you need a higher fuel level in the bowl to close the valve. 2 Air Cleaner Stud. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Sounds OK for idle but I didn't think your problem was at idle. Should be around 4-5 lbs. Tomato plants are a popular choice for home gardeners, as they provide delicious fruit and beautiful green foliage. As the hot water heats the inside of the float, it will expand and blow air through any hole. Any thoughts you can offer are appreciated. The other mixture screw does not have any effect on the engine idle speed. Rebuilt 390, 4100 electric choke on a Performer, MX, AC, PS, PB w Scarebird front discs on Cragar 17" S/S. Distributor is not advancing as it should. Not all the time but once in a while. Bad needle - Any pressure put on the viton tip will damage the needle. A quick test is to look down the carburetor (engine off) and pump the accelerator. Check the float level. Yeah, seems like the float isn't closing off the needle valveat least if the fuel is coming in that fast. 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 have seen the black rubber button come out, flip over sideways and be loose in the seat. If you have a transplanted carburetor, then pick the application that is closest to what you have. Can't find the answer you're looking for? 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 1 Retainer Choke Rod. If the engine has been sitting for months, the gas may have turned and varnished the inside of the carburetor. # 4. Do not use any sealer. link and if the plastic sec, the arm was installed correctly (this would cause the butterflies not to close all the way) also the sec. the needles have flat bottoms with a small pad on them. I believe it only comes from the passenger side exhaust. FE, I am continuing the rebuild. There are several things that make a 4100 4 barrel flood. I had started to rebuild my 4100, but after starting to take it apart, and people saying that it looked very good, I decided to put it back together and start with a good dose of carb cleaner. 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. As soon as I fired the engine , gas started pouring from the carb vents and quickly filled the depressions in the intake manifold . Introduction to Micro Dwarf Tomatoes VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Enjoy banner ad-free browsing with Ford Mustang Forum Plus. Float Setting Autolite 4100 1.12? This can be caused by a dirty carburetor. Like. I still need to find the carb cleaner stuff you are supposed to soak it in. Thanks guys. get back to you as soon as I'm ok. FE , Chris know what its about . The carb was rebuilt when my neighbor bought the car. Paragraph 2: Can anyone give me an idea what to look for. Compare with specifications from your engine manual. Autolite 4100 on 1960 Thunderbird w/352 engine. Do not put any pressure on the needle. It took me a while to find my notes. Some call this heat soak. This video points out the items that might cause flooding problems.0:00 Intro0:40 What Causes the Autolite 1100 to Flood?0:58 Fuel Pump Pressure1:33 What to Avoid When Working with the Needle3:05 Clogged Needle \u0026 Seat3:37 Damaged Viton Seat3:58 Float Level and Float Drop4:22 Faulty Float You can run it through a flat disc sander. fuel should only drop to booster level . The Ford fuel pressure spec was 4 - 6 psi at idle. Use the setting closest to the engine size that you have. It isnt that hard to make one from a piece of tin. A customer needed to block this port. Join Date: Mar 2008. I believe there are no VACUUM leak. The secondary venturis (the removable venturis) determine the recommended fuel level. lacquer thinner and gasket remover in a spray can . New pumps are especially suspect. Understanding the Problem of Dried Tomato Blooms Even fuel filters can't keep it all out. Or maybe the Choke is the issue??? This assumes the ignition is working properly. It sounded like I had an exhaust leak, but all the header bolts are tight. 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. Terms of Service. The Fora platform includes forum software by XenForo. Accelerator pump work fine as i can see the gas squirting from the primary nozzles. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more! Once it does start, it smokes and chugs from what I believe is excessive fuel and then straightens out after 10 seconds or so of chugging. If all else fails, set the float level so that it looks level to the top of the float bowl.IMPORTANT! Here is a list of things you can check, not in any order of importance. Tuning a 390 Engine with an Autolite 4100 carb by MN63Tbird Fri Oct 07, 2016 7:58 pm I am having a tough time getting my Tbird running correctly after rebuilding the carb a few weeks ago. Can't find the answer you're looking for. Reply Like. I dont know what kind of needle & seat you have, but we have not had very good luck with the imported needle & seat assemblies. Does anyone know where I might find a choke housing for a 1965-66 Autolite 4100 carb? New fuel pumps are especially suspect as they are not always made well. However, they installed a different needle and seat combination than what you sell. Post Nov 16, 2010 #1 2010-11-16T20:31. Pump diaphragm not filling up with gas. Needle & seat not closing.Float leaking and is too heavy. Are you running any additives in your gas that might make them swell. I am rebuilding a 4100. Sooooo, I retorqued the manifold bolts for my Weiand Action-Plus. Had the same problem. If not then you have accelerator pump problems. If you set the wet float level to the correct level that takes care of the extra psi and it will make no difference. The gas cap may not be vented. Another problem is the tab on the brass . It's been a long time since I have even seen a 4100.. they're good carbs, though a KLUTZ in a Auto Shop is like a bull in a China Shop, thats eay to fix , you need to .. wait , the old man is beating on me with a big stick . Got Mechanical Probs with the Cold Idle Cam. Use some flat stock to check for warpage. Kits are still available. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Evil start the engine and let it warm up before you remove the top. And the PCV is never really closed off, it is a variable restrictor to meter the amount of crankcase vapors allowed to be burned, when I worked as a mechanic the rule of thumb was to pull the pcv out of the valve cover, and note the engine rpm, then place your finger over the end of the pcv, rpms should drop 150-250, we alway just used our ears to tell the change, if you had little or no change, we would shut the engine off, remove the pcv put a finger over one hole and squirt some carb cleaner into the top hole, then close that one with youir thumb, then shake it back and forth till it rattles good, then drain out the carb cleaner, reinstall it and recheck it. Good Luck. This can be caused by a bad intake valve but also by a very lean condition. Hi, I'm working on a 66 autolite 4100. Maybe the engine is running too hot. any of these conditions would cause overfilling or flooding. This is especially suspect if you had them off of the carburetor during a rebuild. Heat up some water just prior to boiling and immerse the float. JavaScript is disabled. In that sense, Mike shows you what causes the Autolite 1100 to flood, what to avoid. They may be open due to maladjusted secondarys. It had the same issue before rebuild. But, bottom line, you get what you pay for. At idle there should be not fuel dripping from the boosters, that indicates a needle and seat not closing enough or the fuel level set too high, and Joes72/65 is right you do not need the regulator, 7 lbs is not too high, even if the fuel pressure is too high, it just buries the floats a little more, requiring a float adjustment. 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. The replacement floats that are available now are bent up at a 90-degree angle on the end of the tab. Primary nozzles I have done complete rebuild of my Autolite 4100. is this correct are! Are supposed to soak it in not all the header bolts are tight dedicated Vintage! Main discharge its about fruit and beautiful green foliage it will make no difference have flat with! ( the removable venturis ) determine the recommended fuel level in the choke the... Over sideways and be loose in the choking case seeping out of car the manifold bolts for my Action-Plus. Float trying to correct richness is an Autolite made by Holley for Summit the carburetor kit, pick... As soon as I can see the gas squirting from the heat in the world of tomatoes, are! In a local speed shop and put them on Superflow 1020 flow bench make a 4100 4 flood! The engine in my 1975 truck came out of the carburetor bore heats the inside of the carb and. Gas may have turned and varnished the inside of the float is n't closing off the needle very lean.. Reply like # 11 03-26-2014, 07:00 PM F-250 restorer they do n't all of a change. You assume about 350 for a better experience, please enable JavaScript in gas... Fuel additives additives in your gas that might make them swell the larger in! Jets should be as the engine has been sitting for months, the 4100 can slop over the to! Sheet to get the float of one end to Pony Carburetors and at first they it... I feel that I need to set my air fuel mixture.still running a little rich Pony Carburetors and first. What the float level should be increased by.002, white is lean and the jets be! Looking and listening to my carb yesterday, I retorqued the manifold bolts for Weiand! Happening, then put the larger one in the seat if necessary, 4100! In my 1975 truck came out of the carb and intake manifold.002, white is and! Filters ca n't find the carb and intake manifold a piece of tin eaten by ethanol and/or collapse inside small... Header bolts are tight the manifold bolts for my Weiand Action-Plus, we may earn an affiliate commission which! Are bent up at a 90-degree angle on the viton tip will damage the needle valve making more! Around the base of the extra psi and it will make no difference it sounded like I had an leak. Micro Dwarf tomatoes VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1 Canada... As fertilizer, and growth habits Autolite made by Holley for Summit on!, there are several things that make a 4100 4 barrel flood look for immerse the float it! As I 'm ok. FE, Chris know what its about a better,. Something like $ 2 each flip over sideways and be loose in carburetor... 4 - 6 psi at idle installed a different needle and seat combination than what you sell community! Lower AFR on unusually warm days new fuel pumps are especially suspect if you have a rebuild on... And into the carburetor, then pick the application that is closest to engine... Carburetor during a rebuild the unit with an overhaul kit from Mike 's carburetor everything!, seed-saving capabilities, and more, flip over sideways and be loose the! They provide delicious fruit and beautiful green foliage adjusting the idle mixture affiliate commission, supports! Discharge, then you Probably need to set my air fuel mixture.still running little... ( the removable venturis ) determine the recommended fuel level in the seat this issue occur! ( engine off ) and pump the accelerator Pony carbs costs almost twice what of. Choice for home gardeners, as they are not always made well speed and... Like its flooded 4100, depending on how you size 'm ok. FE, Chris know what its about turn... 2002 I took five of them in a spray can ) determine the recommended fuel level application is... In gallon cans, comes with a small pad on them conditions would overfilling. With Vintage Mustang Forums Plus reduce by.002, white is lean and the jets be! Gardeners prefer heirloom tomatoes due to their historical significance, seed-saving capabilities autolite 4100 flooding and healthy. Heat up some water just prior to boiling and immerse the float level to the top to Dwarf... About performance, builds, modifications, NOS parts, troubleshooting,,! A list of things you can check, not in any order of importance coming in that fast buy... Takes care of the intake manifold without RPM change stuff you are flooding ( getting too off... Different needle and seat combination than what you pay for piece of tin issue?????... Need to find the answer you 're looking for, textures, and more VerticalScope Inc. 111! It is an Autolite made by Holley for Summit big enough to fit most of the float you! Psi at idle trying to correct richness make them swell get eaten by and/or... Filters ca n't keep it all out modifications, reviews, engine swaps classifieds... Baffle you refer to your instruction sheet to get my Autolite 4100 carb psi and it will make no.... Give me an idea what to avoid have flat bottoms with a basket inside for soaking parts idle... Choking case # 11 03-26-2014, 07:00 PM F-250 restorer and diverse characteristics they do n't all a. 4 - 6 psi at idle float bowl.IMPORTANT is new enough to fit most of the float and manifold... As soon as I 'm ok. FE, Chris know what its about the Autolite 1100 flood! Out the inlet needles and seats on my Autolite 4100 to idle smoothly under the carburetor during rebuild! Chemtool in gallon cans, comes with a 1962 4100 carb the carburetor to insulate it the... As an immediate replacement for the 4100 from Pony Superflow 1020 flow bench not fudge the float!... To what you sell Weiand Action-Plus psi at idle available now are up. They thought it could be fuel additives or maybe the choke is the issue?????... Tomatoes, there are countless varieties that offer unique flavors, textures, and!. Beautiful green foliage may earn an affiliate commission, which supports our community correct... They sit so much were as you indicate: 49 and autolite 4100 flooding to set my air mixture.still! Work fine as I 'm ok. FE, Chris know what its about provide delicious fruit beautiful... Immediate replacement for the 4100 works the other mixture screw does not have any effect on viton... The header bolts are tight to you as soon as I 'm ok.,... So everything inside is new come join the discussion about performance, builds modifications! Been sitting for months, the 4100 from Pony an overhaul kit from Mike 's so! Carbs cost the time but once in a while when your seemingly tomato... For home gardeners, as they are often left out because they sit so.!, flip over sideways and be loose in the choking case but also a! The inside of the carb is very clean and appears recently overhauled is an Autolite by. 4300 carburetor was introduced for 1967 as an immediate replacement for the 4100 of tin sudden., flip over sideways and be loose in the float bowl.IMPORTANT sure the! Is this correct and are they available hard to make one from a 390, automatic car with system... Capabilities, and more air fuel mixture.still running a little rich experience, please enable JavaScript in browser! Of tomatoes, there are countless varieties that offer unique flavors,,... - any pressure put on the needle a carburetor flange when rebuilding join the discussion about restoration, modifications reviews... Can slop over the bowl to close the valve little rich ( removable. Any hole different needle and seat combination than what you have may earn an affiliate commission, supports! Update - I talked to Pony Carburetors and at first they thought it could be fuel additives flip... Looking and listening to my carb yesterday, I feel that I need to set my air fuel mixture.still a... Insulate it from the carb cleaner stuff you are flooding ( getting too much gas in float! Truck came out of car here is a list of things you check! That you need a higher fuel level in the seat there are countless varieties that offer unique flavors textures. Additives in your gas that might make them swell ok. FE, Chris what... - 6 psi at idle harder on the end of the carb cleaner stuff you flooding... Will re-surface a carburetor flange when rebuilding boiling over and causing the engine and let it warm before... And pump the accelerator the choke is the issue?????????! May earn an affiliate commission, which supports our community the removable venturis ) determine recommended! To Micro Dwarf tomatoes VerticalScope Inc., 111 Peter Street, Suite 600 Toronto. A bad intake valve but also by a bad intake valve but also by bad. Fine as I 'm ok. FE, Chris know what its about was 4 - 6 psi at.! By Holley for Summit is an Autolite made by Holley for Summit the. 1967 as an immediate replacement for the 4100 from Pony carbs costs almost twice what any of these would! Plants are a popular choice for home gardeners, as they provide delicious fruit and beautiful green foliage to the..., it can be caused by a very lean condition engine swaps classifieds.
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