A thorough understanding of the various components is required before working on k jetronic fuel systems. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle lele2lu a 010902021 9705 3 system description system description general the lele2lu jetronic system is a development of the earlier bosch ljetronic fuel injection system. Since remakes are not always economically feasible, airflow meters that are sent to us are assessed in the bosch plant and refurbished if necessary. Front for anyone who decides to do or look into this, because i think this is awesome and i dont know why i hadnt considered it before. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. The le jetronic system is analog, and therefore it does not keep in memory possible damage that may occur. The bosch d jetronic is an electronical gasoline injection system which was introduced in 1967. With the help of the electronic control unit a more precisive fuel metering is possible compared to conventional carburetors so that the more stringent emission standards could be. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974. Bosch lejetronic fuel injection system volvo owners club. If the inlet air temperature sensor fails its resistance tests, you cant service just the sensor. By club member john hall, who worked for volvo usa for many years. For those not familiar with bosch ljetronic fuel injection you may want to start with l jetronic seminar in pdf format. Ljetronic is a boschmanufactured electronic fuel injection featured on many early 80s cars.
Another excellent source of general info on the bosch injection system from the early d jetronic electronic to k jetronic 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. Jetronic is a trade name of a fuel injection technology for automotive petrol engines. L jetronic le jetronic k jetronic k jetronic deutsch k jetronic german manual k jetronic bosch ke jetronic manual bosch ke jetronic workshop manual bosch k jetronic service manual bosch k jetronic manual mercedes bosch d. Now let us have a look how bosch ke jetronic fuel injection system can be diagnosed and repaired on an example of audi 100 2. The d jetronic system developed by bosch in the early 1960s was the first massproduction electronic fuel injection system. The lele2lu jetronic system is a development of the earlier bosch l jetronic fuel injection system. Certain operating conditions make it necessary to correct the mixture accordingly. After a few days, you receive the repaired airflow sensor which is covered by the bosch exchange parts warranty. Notify me of updates to repair kit for 6 cylinder bosch cis k jetronic fuel distributor. L jetronic fuel injection system the l jetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. Everyhing about bosch djetronic some wrongly write djetronik fuel injection system equiped cars of all manufacturers from a as in auxiliary air valve via e las in ecu and m as in map sensor to z as in zero adjustment. The basic ljetronic consists of a fuel pump,fuel filter, fuel lines, fuel regulator, fuel injectors, coldstart injector could be omitted on some ls, thermotime switch, coolant temperature sensor, auxiliary air valve, throttle plate and an airflow sensor flap type in analog ls discussed here. The djetronic system uses constant fuel pressure and flow, so that only injection duration needs to be modified to control airfuel mixture. This system description and tests are based upon the cavalier and carlton vehicles equipped with motronic 1.
The bosch djetronic is an electronical gasoline injection system which was introduced in 1967. The pressure gauge kdep 1034 is the same unit used to test bosch kjetronic cis systems and reads from 06 bar pressure. Onsomeljetronic systems, the air temperature sen sor is visible in the air flow meter inlet. Injection bosch k jetronic preparation dune 205 gti. The cookie settings on this website are set to allow only stricty necessary to give you the very best experience.
The version that comes on the early e30 318i is ljetronic. Reinstall the protective rubber boot and remove the ground jumpers from the harness. Ljetronic electronic control unit ecu, airflow sensor, system relay, fuel pump relay, lambdasond oxygen sensor, vacuum switch, electric fuel pump, coolant. Now im not sure because i havent tried it but i would imagine if one were to install the lh2. With a top speed of 112 mph achieved at 4,980 rpm in fifth gear and a 060 mph acceleration time of 10 sec the gti is adequately fast for todays road conditions, and our overall fuel consumption of 25. Chapter of d jetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system. Now let us have a look how bosch kejetronic fuel injection system can be diagnosed and repaired on an example of audi 100 2. So this has been brought forward from twb pride and joy thread as it became technical discussion on le jetronic and pretty much started my investigations with t. Onsomel jetronic systems, the air temperature sen sor is visible in the air flow meter inlet. Le is the german designation of the european version of their air flow meter, with lu being the designation of the us version, i. A 55 pin connector and multiplug connects the ecu to the battery, sensors and actuators. In my opinion, there are several approaches, which. There are several variations of the technology offering technological development and refinement. Plus a forum where drdjet and other experts help with competent advice and repair instructions.
Ljetronic fuel injection technical troubleshooting article. Z archiwalnego zbioru, bardzo ciekawie nakresla uklad wtryskowy bosch k jetronic. If in doubt, spray break cleaner on pipes, hoses, injectors, intake manifold and map sensor. Bosch ljetronic l jetronic rx7 brought to you by the team at. The engines fuel requirements a sparkignition engine needs a particular airfuel ratio in order to operate. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. Bosch direct injection is also used since 2003 on an opel 2. Bosch licensed the concept to many automobile manufacturers. Chapter of djetronic articles by drdjet describes systematic fault finding troubleshooting and repair on your bosch fuel injection system. Tell a friend tell someone you know about this product. Bosch l jetronic fuel injection troubleshooting, maintenance. Mechanical fuel injection bosch kjetronic, bosch k jetronic fig. The bosch lhjetronic electronic fuel injection system became available on the b21flh engine in 1982 and on the b23flh in 1983.
Bosch kjetronic cis tuning, 86hc, 87hc, 88 x180 esprit majority of the lotus owners are of the opinion, that bosch kjet cis equipped esprits would not respond well to common performance improvement practices. Not only does this reduce a significant restriction in the intake. I am writing this article specifically from the point of view of a u. This kit will service the following fuel distributors. Bosch kjetronic fuel injection part 1 volvo owners club. Basically, it is pretty similar to the kjetronic with some changes and modifications. Anyhow here is the link bosch kjetronic fuel injection manual. Bosch le jetronic ignition system distributor scribd. Bosch djetronic fuel injection note s compilation swem. In the le jetronic system, the injection valves spray the fuel simultaneously, what is to say, they are all driven at the same time. Bosch ljetronic fuel injection troubleshooting, maintenance. 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. 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. Jun 24, 2008 z archiwalnego zbioru, bardzo ciekawie nakresla uklad wtryskowy bosch k jetronic.
The lejetronic system is analog, and therefore it does not keep in memory possible damage that may occur. It is a socalled hybrid a mixture of mechanical and electronic injection systems. The lele2lu jetronic system is a development of the earlier bosch ljetronic fuel injection system. Before troubleshooting, testing or adjusting the k jetronic fuel injection system, the ignition system and the mechanical system of the engine compression, valve timing, etc. Robert bosch llc north america also developed a full turnkey ems for the gm 2. Bosch kjetronic cis tuning, 86hc, 87hc, 88 x180 esprit. L jetronic system, although a number of refinements have improved operation. Fuel metering distributor rebuild kit for 4 cylinder bosch k jetronic. In addition to the pressure gauge and fittings shown in the picture, a tachometer, co meter and voltohmmeter are needed for testing the ljetronic system in the vehicle as described in this manual.
With the help of the electronic control unit a more precisive fuel metering is possible compared to conventional carburetors so that the more stringent emission standards could be matched. The basic l jetronic consists of a fuel pump,fuel filter, fuel lines, fuel regulator, fuel injectors, coldstart injector could be omitted on some ls, thermotime switch, coolant temperature sensor, auxiliary air valve, throttle plate and an airflow sensor flap type in analog ls discussed here. Le is the german designation of the european version of their air flow meter, with lu being the designation. In this system, the injection command unit controls only the fuel system. It was primarily based on patents that bosch licensed from the bendix corporation. 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. L jetronic is a bosch manufactured electronic fuel injection featured on many early 80s cars.
Unfollow bosch jetronic to stop getting updates on your ebay feed. Or lets have a look at one more version bosch cise continuous injection system electronic. This website is free only for people who do not block ads for example, firefox browser itself can cause ad. This was a microsoft powerpoint document, presented at the 1999 e12 fall fest in virginia beach, va. So jaguar suddenly had no solution and bosch could only supply a product for 4, 6 and 8cylinder engines. Licensing some of boschs l jetronic concepts and technologies, lucas. The airflow sensor is therefore a functional component of the k jetronic. The task of a fuel injection system is to supply precise amount of fuel to the combustion chamber at that particular moment. Detach the operational relay set from the relay block as well as from the safety appliance located under the steering tube. If injection timing is working correctly, the oscilloscope will display the. Tech articles and troubleshooting the bosch ljetronic systems for the alfa romeo spider. If you continue without changing these settings, you consent to this but if you want, you can change your settings at any time at the bottom of this page. Repair kit to rebuild a bosch k jetronic fuel distributor metering, this kit will service all 8 cylinder aluminum units that do not have eha.
Gregs bosch ljetronic fuel injection idle adjustment, diagnostic and tune up page, latest revision sept. The bosch djetronic electronic fuel injection system is composed of 3 major subsystems. Spec alfa romeo gtv6s, milanos, and 19821989 spiders, bmw e12 5 series and various 3 series cars, the datsun 280z and 280zx, all u. The airflow sensor is therefore a functional component of the kjetronic. Le jetronic injection vs aftermarket ecu and sensors. Limiting factor was the current that the bosch 6calinder ecu could supply to injection valves.
The bosch d jetronic electronic fuel injection system is composed of 3 major subsystems. Now use the ohmmeter to check the resistance of the wire in the air mass sensor. Fuel metering distributor repair kit for bosch k jetronic 8. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. Repair kit for 6 cylinder bosch cis k jetronic fuel distributor. So jaguar asked lucas to use bosch d jetronic and extend it for 12cyinder engines. This synthesis, comprising the mechanical basic functions coupled with electronic adap tation and opti mization functions, is the ke jetronic. In the lejetronic system, the injection valves spray the fuel simultaneously, what is to say, they are all driven at the same time. Injection le2 jetronic bosch powered by feedburner page 4 sur 31. The complete system contains the following components. Gtv6 and milano, however if you own any car with bosch ljetronic injection the. Repair kit for 6 cylinder bosch cis k jetronic fuel. The d jetronic system uses constant fuel pressure and flow, so that only injection duration needs to be modified to control airfuel mixture.
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