Have a read thru the troubleshooting page link is on the. Perfect for all diy persons your doityourself specialist for service manuals, workshop manuals, factory manuals, owner manuals, spare parts catalog and user manuals. Kejetronic bosch technical instruction series bosch, robert on. The primary pressure regulator that is installed in the fuel distributor housing maintains a constant pressure in the fuel system of the k jetronic. I wanted to fill in the gaps in knowledge and get and idea of how the kjetronic system looks like from inside for a long time already. These fuel injection systems were considered to be really reliable and trustworthy.
Bosch l jetronic fuel injection troubleshooting, maintenance. Rebuild instructions click here for full instructions it is important not to dismantle the fd more than nesasary, unless it is corroded or gummed up inside. This manual will describe the kjetronics function and its particu lar features. Ferrari 400 k jetronic downloads ferrari 400 parts. Ive been having this problem whereby upon acceleration especially from stop my 420sel stutters and stumbles, then catches and continuous accelerating just fine. A thorough understanding of the various components is required before working on k jetronic fuel systems.
If that is the case, your ecu is okay and you should check fuel pump relais, cabling and the fuel pump itself. K jet mechanical fuel injection depends on continuous regulation and variation of fuel pressure delivered to the injectors. The primary pressure regulator that is installed in the fuel distributor housing maintains a constant pressure in the fuel system of the kjetronic. Mechanical fuel injection bosch kjetronic, bosch k jetronic fig.
The pressure gauge kdep 1034 is the same unit used to test robert bosch k jetronic cis systems and reads from 06 bar pressure. The electric fuel pump is located underneath the rear floor panel. This is a pdf document which covers theory of operation for the introduction of the cis in the 1973. Djetronic history and fundamentals history the djetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. Approximately up until 1994 mechanical fuel injection systems have been installed on certain mercedes, audi, volkswagen, ford etc. The pressures stated apply to the 190e, so confirm pressures for the 420sel as stated above, but the procedure. It was therefore soon replaced by bosch l jetronic. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection systemfehlersuche. Bosch technical instruction k jetronic pdf contains help for troubleshooting and will support you how to fix your problems immediately. Better yet would be to research, edit and post up a completly refined web page link of my own, aint got one yet. Kjetronic fuel control unit on a 102 engine at a glance. Other than on kjetronic, fuel pump relais normally is not a common source of failure. But the most blatant suggestions in the cis troubleshooting threads is adjusting the fuel mixture for starting or running problems.
Bookmark file pdf bosch mono jetronic manual nswpeace bosch mono jetronic manual nswpeace as recognized, adventure as competently as experience more or less lesson, amusement, as skillfully as deal can be gotten by just checking out a book bosch mono jetronic manual nswpeace plus it is not directly done, you could recognize even. The fuel return line was also eliminated and a check ball. Kjetronic service guide by robert bosch, 9781852260286, available at book depository with free delivery worldwide. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. Using the kjet fuel pressure test kit notes from experience with 1979 volvo 244dl and a 1983 volvo 244ti turbo. And doesnt haynes or chilton have a manual like this drawn up already. This article was done without support of jaguar d jetronic specialist. Kjetronic troubleshooting from a couple of specialists mercedes. The fuel return line was also eliminated and a check ball installed in its place.
There was a lot i was not aware of and there are a number of things that i may not be able to help with. The filter is a large metal canister with different fittings at either end to avoid the unit. In the mean time, lets strive to demystify what fi is, how vw does it, and how to keep our sciroccos running. There are several variations of the technology offering technological development and refinement. You can open them as pdf file or save them on your computer. Having recently sorted out a problem with mine, and hopefully understanding its. It does not work this way for fuel injection systems. Assembly instructions for pistons on 911 sc1981 models 4. Since this point, the kjetronic has now become particularly impor tant with regard to maintenance and repair. Bosch ke jetronic manual bosch k jetronic manual mercedes bosch k jetronic service manual bosch ke jetronic workshop manual bosch d jetronic fuel injection manual manual k jetronic k jetronic l jetronic le. This synthesis, comprising the mechanical basic functions coupled with electronic adap tation and opti mization functions, is the ke jetronic. The jetronic is a very reliable unit and rarely needs attention. A thorough understanding of the various components is required before working on kjetronic fuel systems. Along with more than 28 pages of illustrations, that guide the reader through each service, and maintenance procedure.
The title of this pdf download which mentions the number 1 987 722 101 on the last page in the right bottom corner is ke jetronic book. Cables on fuel pump can corrode or fuel pump can be worn. Rebuild instructions click here for full instructions. K jetronic is a continuous injection system cis, which means that the fuel injectors receive and produce a constant flow of fuel, provided there is proper pressure, whenever the engine is running. All mercedesbenz fuel injected engines are equipped with electric fuel pumps. We are not dealing with a carbureted system where you could turn the mixture screw left or right until you get some result. The result of a massive pelicanite good will fire recovery effort. As the ke system has been described and pictured for many times i decided to show you how the k jetronic system on a 102 engine of the w123 model operates. View and download porsche 911 workshop manual online. Before troubleshooting, testing or adjusting the k jetronic fuel injection system, the ignition system and the mechanical system of the engine.
Anyhow here is the link bosch kjetronic fuel injection manual. The bosch k jetronic fuel injection system is a continuous fuel injection system which consists of mechanical type fuel injectors, a fuel distributor unit, operated by a sensor plate, and a control valve. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed and marketed by robert bosch gmbh from the 1960s onwards. Much of this same information exists in this primer. This manual will describe the k jetronic s function and its particular features. Do not confuse the electric fuel pump with the injection pump. The details in this file refer to ke jetronic 19841987 on the us coupe and 4k the 1987. This synthesis, comprising the mechanical basic functions coupled with electronic adap tation and opti mization functions, is the kejetronic.
Electrical and vacuum operated regulators and switches complete the assembly. Bosch classic, remakes, kkejetronic airflow sensor. Kjetronic system overview fuel supply 14 fuel metering 18 adapting to operating conditions 24 supplementary functions 30 exhaustgas treatment 32 electrical circuitry 36 workshop testing techniques 38 kjetronic since its introduction, the kjetronic gasolineinjection system has proved itself in millions of vehicles. Since the electric fuel pump supplies more fuel that is used by the engine, a valve in the pressure regulator opens and returns this excess fuel to the fuel tank. Im going to toss some links on here as sourdough starter. Line or system pressure readings will help define a problem with the fuel delivery system such as the pumps and filter. I have the entire book that covers k as well as others. Kjet mechanical fuel injection depends on continuous regulation and variation of fuel pressure delivered to the injectors. Kjetronic is a continuous injection system cis, which means that the fuel injectors receive and produce a constant flow of fuel, provided there is proper pressure, whenever the engine is running. This little goody is a common culprit in k jet or cis problems, along with pumps, oneway valves, accumulators and fuel distributors. Onsomeljetronic systems, the air temperature sen sor is visible in the air flow meter inlet. Bosch licensed the concept to many automobile manufacturers.
If your run a digitalp system, i recommend you ro replace it with l jetronic. Bosch technical instruction k jetronic pdf manufactured by the company bosch presented for you in electronic format page size 592 x 841 pts rotated 0 degrees. Clean, repair and rebuilding your warm up regulator. R02cr e b colqegu couivo\ aglase we guq ph ph ecn le logq coucvtloue eae16uj sqgble 10 cugua vqsblsqou ob6lguua couqguoue guq nuq6l bgl11cr1gl logq. Due to the extremely fine tolerances within the bosch k jetronic system, it is vital that the filter has excellent filtration properties without impeding the flow on the fuel. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. Jetronic is a trade name of a fuel injection technology for automotive petrol engines, developed. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. Cis bosch kjetronic fuel injection pressue tester mercedes. About the only thing that can go wrong with it is the plug can work loose if its not secured properly or the pins can get a little corroded which interfers with signals from sensors.
This item fits all bosch warm up regulators, as fitted to mercedes, ford, porsche, rolls royce, bentley, audi volkswagen, ferrari, lamborghini, with the following part numbers. Bosch k jetronic mechanical fuel injection troubleshooter. As the ke system has been described and pictured for many times i decided to show you how the kjetronic system on a 102 engine of the w123 model operates. It was primarily based on patents that bosch licensed from the bendix corporation. The trio of specialists helped me improve, refine, and verify my list of troubleshooting techniques for the k ke jetronic system that we have on our 190es. I wanted to fill in the gaps in knowledge and get and idea of how the k jetronic system looks like from inside for a long time already. As most of the time the only part that has failed is the diaphragm. Anyhow here is the link bosch k jetronic fuel injection manual. Rumours say that there are no two ecus showing same results on test stand.
The kjetronic system was installed as original equipment in series production vehicles in the years 1973 through 1995. However, the primer includes much additional practical information, such as system testing and individual 911 component specifications. Troubleshooting symptoms kjetronic is a mechanical system. Bendix developed the basic idea of using an inductive element coupled to manifold vacuum as a. If your run a digitalp system, i recommend you ro replace it with ljetronic. While new carburated engines were used in the european markets, vw adapted the ljetronic for the type 4 in the us due to more stringent emissions and fuel consumption regulations. Within the data books for this system, it is shown that the critical time for maintaining these. Rebuild kit for bosch cis jetronic warm up regulator. Warm up regulator repair instructions ferrari 400 parts.
The pressure gauge kdep 1034 is the same unit used to test robert bosch kjetronic cis systems and reads from 06 bar pressure. The bosch kjetronic fuel injection system is a continuous fuel injection system which consists of mechanical type fuel injectors, a fuel distributor unit, operated by a sensor plate, and a control valve. Please refer to our instruction manual on cleaning cold start injectors with the pulse generator. This manual will describe the kjetronics function and its particu lar. Another excellent source of general info on the bosch injection system from the early djetronic electronic to kjetronic mechanical constant injection all the way to the later variations of the motronic engine management with lambda exhaust sensing to allow the system to function closedloop, is the book. If the inlet air temperature sensor fails its resistance tests, you cant service just the sensor.
Kjetronic troubleshooting from a couple of specialists. Bosch kjetronic continuous injection system mechanical fuel injection overview 15. Playing with your k jetronic warm up regulator, or wur. Bosch technical instruction k jetronic news manuals. See more about the documents troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use click link. Using the k jet fuel pressure test kit notes from experience with 1979 volvo 244dl and a 1983 volvo 244ti turbo. This manual can be viewed on any computer, as well as zoomed and printed, makes it easy to diagnose and repair problems with your machines electrical system. K jetronic is a mechanical fuel injection system developed by bosch in the 1970s and is used in a wide variety of vehicles around the world. Today, it has been superseded by gasoline injection systems which thanks to electronics have been vastly im proved and expanded in their func tions. Cis troubleshooting for dummies pelican parts forums. Nov 21, 2009 today, it has been superseded by gasoline injection systems which thanks to electronics have been vastly im proved and expanded in their func tions. The sparkignition or ottocycle engine operating concept the sparkignition or ottocycle1 powerplant is an internalcombustion ic engine that relies on an externallygenerated ignition spark to transform the.
844 1136 1286 467 430 1342 1365 84 759 1262 943 48 622 437 348 714 619 330 828 458 486 796 910 204 1445 591 1435 673 1093 354 804 1314 443 662