A single wire sensor will take its ground through the headers, a two wire sensor has its own ground, a three wire sensor provides a heater that should be used for the first minute to preheat the sensor, while a four wire sensor provides a heater and O2 sensor, each with their own grounds to prevent cross signal. If you attach the vacuum line backwards the solenoid cannot control the vacuum properly. Once youve located them, turn both screws clockwise until theyre snug against the stop. Model J's are good for about 100 HP. It sounds like I should hook up a voltmeter to the computer wires and monitor the voltages and see which direction it goes when I experience the erratic idle. IMPCO 100 too lean idle circuit and load - Alternative Fuels PDF Model 100 Carburetor Carburetors & Mixers Model Ca100 Carburetor I actually prefer testing the solenoids duty cycle to see what the fuel mixture is doing instead of measuring the O2 sensor. How Do You Adjust the Idle on a Propane Forklift? Example, if you see a duty cycle of 12 volts at the solenoid wires the O2 will be reading rich or 1 to 1.2 volts. If it doesnt, return to the standard valve or you fuel consumption will be unrealistic. The Model 100 is also . I am guessing the egr valve may not be seating correctly at random intervals and causing the irregular idle. Thanks in advance for any help. Copyright 2000-2020 by. If you have an ideal mixture reading of 3 volts it is lean biased with little rich control. I bought it a year and a half ago and repaired the head gasket and have put a few thousand miles on it since. ford triton impco ca 100 manualworkshop manual impco 100: carburetors | ebaytest florida assessment impco mixer adjustment - free ebooks download -outboard impco 100 manual70hp johnson manual impco training manual - scribdvalmet 911 parts manual impco ca125 owners manual - ebooks free downloadmanual template nissan lpg starting problem, discussion forum1219 . The second thing to consider is the temperature. 12 Sep 2013 08:09, Posted 106 HP (79 kW) @ 170 CFM (80 L/s) and 1.5 in Hg manifold depression. Youve now adjusted your idle fuel mixture and your engine should be running better than before. Suddenly it is quite the sporty little truck. What is a typical service interval for these regulators? I find once it is registering voltage my digital voltmeter jumps around 300 to 400 millivolts. Inlet Pressure, -1.5 w.c. (-0.37 kPa). C3H8, Thanks for the thorough reply. If the EGR is the problem the idle quality issues will be fixed immediately. If the engine will be operated at high altitudes, then the fuel mixture will need to be adjusted to compensate for the thinner air. BRC LPG reducer. He asked how to adjust the mixture and I didn't have an answer as mixture adjustments as I've deduced exhibit different results on gas vs gasoline. I suppose the engine could have a vacuum leak but I haven't discovered one with a lot of time spent looking for one. 12 Sep 2013 16:44 I will take voltage readings at the O2 sensor while driving to work next week but I am suspecting I may want a heated 02 sensor and I may just resign myself to 16mpg. I know propane will frequently net fewer miles per gallon but the two wheel drive pickup is about a thousand pounds lighter than my 4wd version, it sits lower and has smaller tires so I would guess it would get close to 30mpg on gasoline. SPECIFICATIONS Signs of wear on the pin usually are indicated if you see any frost on the vacuum line comming from the lock off. Impco 225 Adjustment - Alternative Fuels - Raso Enterprises Older VFF 30's commonly had the pin and Oring wear out between the vacuum and propane section. Finally, start the engine and let it idle for a few minutes to check the mixture adjustment. Amazon.com: Impco Model 100 40 results for "impco model 100" Results Impco Lpg Propane Carburetor Mixer Ca100 Ca100-138 $18750 FREE delivery May 15 - 16 Or fastest delivery Wed, May 10 Only 1 left in stock - order soon. A single wire sensor will take its ground through the headers, a two wire sensor has its own ground, a three wire sensor provides a heater that should be used for the first minute to preheat the sensor, while a four wire sensor provides a heater and O2 sensor, each with their own grounds to prevent cross signal. But dont worry its actually not that difficult! Runs great for about 45 minutes. The Model 125 carburetor is a single-diaphragm air valve carburetor/mixer for applications requiring air flow up to 235 CFM (111 L/s). The Model 100 is a single diaphragm air-gas valve carburetor/mixer. The only thing I can recommend there is a soft rubber mount of some kind to lessen the sound transfer. You will NOT be able to set up at 500mv due to the way the sensor is designed. This would give you the erratic idle you describe. Propane being a dry fuel does not cool the surface temps as much as wet gas. With the engine running, turn both screws counter-clockwise until the engine starts to run rough. Anyhow the wiring seems to be the same. I was anticipating a bit more as my other gasoline 4wd toyota gets 24 and it is 4wd/standard trans. In general, higher octane fuels can tolerate more compression before igniting, so they can be used in engines with higher compression ratios. Try and get about 350mv for a lean idle mixture and around 650 to 750 for rich accel. If I parked on a gravel road it would clear all the dust and small gravel where the exhaust was directed. Here's a quick guide: More changes will follow in the coming days . The third thing to keep in mind is what type of fuel is being used. We and our partners use cookies to Store and/or access information on a device. Impco recommends using a CO analyser for proper adjustment but, until you get to shop with an analyser, you can get by by making sure that you don't run the engine at full throttle for any length of time. You must have JavaScript enabled in your browser to utilize the functionality of this website. During hard acceleration you should see a rich O2, however you still want to see the solenoid maintain some control of the mixtures. I have a 1989 2 wheel drive toyota pickup with a 22re motor and automatic transmission that is running on propane. Initially I suspected tight valves, so I checked and adjusted them and they were tight on two exhaust valves but the problem persists even after correcting the valve adjustment. thanks C3 for the good comments. If it is not adaptable, replace with a Model 55. CFM on the mixers is the same. Be sure the repair kit part number you are using is correct for the component (s) being serviced. Here is some detailed information on how to do this: Once this is identified or eliminated as the problem put it back to normal or correct the fault. Be easier just to buy another mixer by IMPCO this time, and maybe the 125. Are you referring to the wires going to the solenoid (yellow and violet)? I did some research and learned that I needed to swap the 22re distributor for a 22r to allow it to advance properly. You said you adjusted the valves indicating you have solid lifters. Although it has a trim pot on its side I may be able to adjust it to match the hi tech tail pipe readouts to sit in centre. The only difference in the 100 is it is made for a remote air cleaner. It offers a 90 degree air inlet to pro-. If you have an ideal fuel mixture reading at the sensor BUT an average duty cycle reading of 10 volts, it is biased rich with little lean control capability. Does your tuning manual mentioned on this forum cover this type of application? You mention the feedback solenoid so we assume you have a feedback system, and if so, adjusting fuel mixtures by ear and seat of your pants is incorrect (and has never been the correct means). You will NOT be able to set up at 500mv due to the way the sensor is designed. I know propane will frequently net fewer miles per gallon but the two wheel drive pickup is about a thousand pounds lighter than my 4wd version, it sits lower and has smaller tires so I would guess it would get close to 30mpg on gasoline. I have forgotten the actual number of the diaphragm I put in but I was led to believe it was the correct one for a feedback equipped carb and I think I paid three or four times more than what I would have paid for a non feedback diaphragm. 13 Sep 2013 00:35, Posted Impco Propane Model 100 Manual - energymadison I had a sneaky suspicion that it had a light idle for fork use, but did not think it would have a leaning ring from new, but maybe so - I need one for another application and had run out so would be a useful find if there is one. We have made some changes to our website. The idle air fuel mixture is best adjusted only with a engine CO exhaust analyzer and the mixture should be adjusted to 0.30 to 0.70 percent carbon monoxide. This will give you great performance off the line and achieve some good economy numbers. Should I check voltage at the 02 sensor for mixture under acceleration or can I take that off the computer wires as well? Now, turn each screw counterclockwise 1-1/2 turns. This is literally a valve IMPCO TECHNOLOGIES, INC. -42-. IMPCO, which stands for Imperial Machine Products Company, manufactures various propane vaporizers. Hi, I am a new user to the forum. The FCP does not have adaptive memory while the others do. NO TEFLON TAPE: Do not use Teflon tape to seal any fuel fittings. Remember that an engine is still an engine and will have the typical problems, regardless if it has propane or not. Initially it had no power and was quite unimpressive to drive. This unit is available for LPG Vapor and Natural Gas applications with air flow requirements up to 197 CFM (93 L/s). Next, turn each screw clockwise until it is lightly seated. * Turn idle air screw out until engine starts to run rough. The 22r is a carbureted motor that uses centrifugal and vacuum advance. Top subscription boxes right to your door, 1996-2023, Amazon.com, Inc. or its affiliates. If you have an average mixture voltage of 5 to 7 volts, the O2 sensor will ALWAYS be right on. Home Parts Regulators Model E & PE Browse By Category The model E & PE are engine heated two-stage regulator / vaporizers. It offers a 90 degree air inlet to provide low overhead clearance, and is available with several Air Horn and throttle body options. Impco 425 initial settings - Alternative Fuels - Raso Enterprises Can I use any 100 carburetor body with the proper diameter fittings and put my feedback solenoid on it or are there features unique to the model 100 with feedback? Although it has a trim pot on its side I may be able to adjust it to match the hi tech tail pipe readouts to sit in centre. I find once it is registering voltage my digital voltmeter jumps around 300 to 400 millivolts. Too much fuel. The feedback valve should NOT have cost 3 or 4 times the normal valve, oops! First, locate the idle mixture screws on the carburetor. It has an impco model J, vff 30, impco 100 with a feedback solenoid and computer. Voltages less than 250mv are lean, while mixtures over 750mv are rich. It is so erratic that I am not sure that I am really seeing any changes in the output as I change the mixture screw on the carb. 1. Then, locate the regulator knob and turn it clockwise until you feel resistance. Turning this screw out makes the full throttle mixture richer. At this point I am thinking I should rebuild the Model J regulator and perhaps replace the carburetor body. I really thought the new diaphragm would solve the problems but it has made little or no difference. The IMPCO fuels system utilizes fuel lines and hoses with swivel connections that at-tach to fixed mating connectors. This website uses cookies to improve your experience. LEDs with the centre one being 15.5:1 0.48 to 0.49V. To properly adjust these screws, its best to use a tool called an exhaust gas analyzer (EGA). Impco LPG mixer - mixture adjustment - Patrol 4x4 * Turn idle air screw in approximately turn to turn or until engine . The distributor change was a good move, however did you check the timing curve. and adjust idle mixtures for an average of 5 to 7 volts.'. by C3H8 Sun Feb 28, 2016 10:10 pm, Post A model E would be better but it is overkill the other way. Although this is a fact it was quite common to use a J on this size of engine. This is my post from some time ago when I ran a 100 mixer and got results above. You are using an out of date browser. The images I see on the internet show a black resin cube with wires coming out of it. There are two of them, one on each side of the regulator. Franz, Thank you for setting me straight on the proper adjustment of feedback mixtures. Then, use a tachometer to measure the engines idle speed. The Impco Commander is the name for the black box, what you call the resin box. The internal machining between all 100 and 125 mixers is identical. They reduce combustion temperatures lowering Nox and increase fuel economy. IMPCO Training Manual - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Model 100 . One question I am having trouble finding an answer to is what kind of differences there are between impco 100 carburetors. I did some research and learned that I needed to swap the 22re distributor for a 22r to allow it to advance properly. If you do not have a feedback setup, put a volt meter on the O2 sensor wire. Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Category The Model 100 is a single diaphragm air-gas valve carburetor/mixer. I haven't gone for a drive yet with the voltmeter connected. Failure to follow this warning may cause the . The materials of the valve will retain a little extra heat and therefor expend a little more. Yes, the voltage does pulse, about 20X per second. If you own a Nikki brand LP gas regulator, you may need to adjust the gas pressure at some point. Once you hear gas escaping from the tank, turn on your stove or other appliance that uses propane. That's a standard Vff-30 lock-off and a strange-looking reg.. looks like an Impco CS4-30772-004: do you have a link for the cobra? At this point, both carburetors should be supplying fuel to the engine at idle and your mixture should be adjusted correctly. The only thing I can recommend there is a soft rubber mount of some kind to lessen the sound transfer. This will lean out the mixture and make the engine run smoother at idle. I did disconnect the vacuum to the egr valve to rule it out as a cause of erratic idle and the motor will still idle very slow after a high speed run. It isnt tricky and once connected, it makes perfect sense. Remove 3 Screws in legs of base to complete disassembly. I have come back to the distributor again when I found I had no spark at all. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. This will set the idle speed at its highest point. For a better experience, please enable JavaScript in your browser before proceeding. Be careful not to over-revthe engine! Exploded diagram of the Impco VFF-30. Heres how to do it: Are these the wires I use to test the mixture/voltage on? I have two unused wires from the impco commander. Checking at the solenoid will allow you to see how aggressive the duty cycle is to control the mixtures. I'm guessing that you have a 1600 cc engine in yours. http://saimlease.net/SAIMLINTRA/int/moteurs thermiques/IMPCO Training Manual.pdf, Running gen on Simultaneous Mix of Propane and Nat Gas. This is a IMPCO model 100 system and everything seems to be hooked up and the vacuum lines, etc. My Impco commander is housed in an aluminum box and has FCP-1 marked on the housing. Also make sure you are using vacuum from the base of the mixer, not manifold vacuum or TB vacuum. If I run the engine at high rpm the voltage will go up. The most common reason for using the J was to save cost. This is a common Toyota 4Y issue; unit cranks and starts but as soon as you release the key the engine stops. We gave up on returning it as futile. #1 I had a friend over and he is considering a nat gas generator for backup. It was kind of muddy to crawl under and verify but I will verify. If you have any questions about adjusting your Nikki LP gas regulator, please consult your owners manual or contact customer service for assistance. Subscribe our newsletter to stay updated. I have two unused wires from the impco commander. Typical LPG Fuel Tank and Manual Shutoff Valve Locations . Thanks, Karl. Now, put the cap back on and check that the adjustment was successful by turning on your appliances and checking for proper operation. Vs the propane 2wd automatic. To make your adjustment, turn the impeller clockwise to increase the gas flow or counterclockwise to decrease it. 40-5FG25 forklift that has propane fuel. Your on the right track with some of your intial fixes and checks. Any ideas? The next trick will be to try flipping the marked. by C3H8 Thu Feb 25, 2016 5:58 pm, Post Any thoughts on the solenoid not varying voltage, low gas mileage, and 02 sensor options would be appreciated. Sorry for late entry, I've been on the road (again). Contact us for help. This unit is available for LPG Vapor and Natural Gas applications with air flow requirements up to 197 CFM (93 L/s). 13 Sep 2013 09:34, Modified Next, locate the adjustment screws on the carburetor. Hyster Upgrade - (BP-8H) (pdf) Download, Toyota Upgrade (BP-4T) (pdf) Download, 1501-L Vacuum Safety Switch - (1501-L) (pdf) Download, 1501-PA Vacuum Safety Switch Kit - (1501-PA) (pdf) Download, Carter Thermo-Quad Conversion (AA3-64) (pdf) Download, Commander Oz Air-Fuel Control Unit (EK-CDP-1(H)) (pdf) Download, BEAM 120A-RBK / 120A-RB Installation & Service Instructions (pdf) Download. impco ca 100 carburetor manual - vdocuments.net The 100 mixer in your truck should have an air gas valve in it that is part number AV1-14-12. Thanks again for the help. Checking at the solenoid will allow you to see how aggressive the duty cycle is to control the mixtures. Full throttle acceleration on the J would stress it for short periods of time. The idle problem has been going on long enough that my timeline is a bit hazy but I recall the idle being better when I first got the truck and it has now gotten so either have to accept a very fast idle or continually feather the throttle at stoplights. Steps; Dont worry about a 4 wire sensor. The 100 mixer provides a convenient 1/8 NPT balance port and two separate air valve vacuum ports. This will give you great performance off the line and achieve some good economy numbers. Next, check the spark plugs and ignition system to make sure theyre working properly. Lighten the springs if you have to. Vs the propane 2wd automatic. I actually have two model E's sitting in a parts bin. Remove the top cover (4 flat-slot screws) and read the tag on the valve. "A Community of Antique Engine Enthusiasts." Locate the carburetor adjusting screws. 2. The 22r is a carbureted motor that uses centrifugal and vacuum advance. Standard Model 100 Carburetor for Natural Gas, LPG & Digester Fuels CA100M-1 Mixer 1-1/2 inch Air Horn $128.62 CA100M-2 Mixer 1-7/8 inch Air Horn $78.56 CA100M-3 Mixer 2-1/16 inch Air Horn $68.68 CA100M-4 Mixer 2-5/16 inch Air Horn $68.22 Throttle Bodies Are Also Available, We Will Need The T2- Number Found On Your Throttle Body The Model 100 Se. Additional low speed, idle mixture control can be obtained to lean air/fuel mixtures through the use of optional shims. The mixture screws are located on the front of the carburetor and are used to regulate the amount of fuel and air that enters the engine. by jono Fri Dec 01, 2017 3:42 am, Post It offers a 90 degree air inlet to pro-vide low overhead clearance, and is available with several Air Horn and throttle body options. This website is best viewed in Internet Explorer 10 or above. This a solid state distributor/coil assembly. If not, turn off the engine and repeat the adjustment process until you get it right. Another test is to clamp off the vacuum line using needle nose pliers while the engine is idling. This is Toyota PN19030-96150 distributor. The link to the commander instruction manual was very helpful. by jono Sat Feb 27, 2016 6:26 am, Post I do have two additional wires (orange and gray) that have never been connected. Voltages less than 250mv are lean, while mixtures over 750mv are rich. Remove 3 Screws and Elbow Assy. by alehander Thu Sep 20, 2007 5:39 pm, Post If this happens you have to change or rebuild the lock off. I am guessing the conversion was done by someone with limited motivation if they accepted the trucks performance as ok when all it needed was a different distributor. You will NOT be able to set up at 500mv due to the way the sensor is designed. Then when I open lpg tank, it will not start. Here are some pictures of my setup for reference. I just filled my tank and my mileage is still only 16mpg. Thanks, Karl. I am guessing it has run on propane since new and most likely it spent its life driving around campus at 25 mph. Report an Issue | To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. At the distributor there are two wires in the connector. Thats it! Today I disconnected the egr vacuum line and pulled a vacuum with a vacuum pump. If I applied the smallest amount of vacuum I would get similar symptoms to my erratic idle. REBUILD INSTRUCTIONS Disassembly Remove 3 Dome Nuts and 3 Cover Screws. teners used in the installation of the IMPCO fuel system. I need to pay a visit to my toyota mechanic and run that past him to make sure I am not overlooking something that will be obvious to him. 3. Having trouble using the Discussion Forums? adjustment is opened, the air valve partially closes,. Before you leave, we hope you contact us with your feedback. Voltages less than 250mv are lean, while mixtures over 750mv are rich. IMPCO Training Manual | PDF | Fuel Injection | Gasoline - Scribd I think they were orange and grey. They reduce combustion temperatures lowering Nox and increase fuel economy. by jono Fri Mar 25, 2016 4:54 pm, Post My only remaining issues are poor fuel economy and unstable idle. I adjusted the idle mixture screw til I got the highest idle speed and adjusted the larger nut mixture setting until I could stomp on the throttle without the engine bogging under low rpm hard acceleration. The 100 mixer provides a convenient 1/8 NPT balance port and two separate air valve vacuum ports. I actually prefer testing the solenoids duty cycle to see what the fuel mixture is doing instead of measuring the O2 sensor. To adjust the regulator, first make sure that the engine is off and that there is no propane flowing through the system. CA100, 110 Mixers & Carburetors CA100 Mixers & Carburetors. 4. A leaking EGR could be causing the idle problem, or if the vacuum is ported wrong it could be causing the EGR to stay open once the engine is hot. You can install the 1447 and use your feedback solenoid. Different hose sizes are available for different engines. Dial the mechanical to come in full by2200 to 2500 maximum. LP isn't as clean as most think and I've seen these units so clogged it's a miracle they ran at all! The low speed screw will have no effect on the operation of the unit.