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. Kmi remanufactured ke jetronic fuel distributors are carefully remanufactured by our technicians. Fuel metering distributor rebuild kit for 4 cylinder bosch k jetronic. In 1974, bosch introduced new systems kjetronic and ljetronic. The throttle switch is another original bosch part with no. Repair kits for aluminum bosch fuel distributors salvox.
Popular with porsche, mercedes and vwaudi in the 80s. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. The d jetronic system uses constant fuel pressure and flow, so that only injection duration needs to be modified to control airfuel mixture. Bosch lejetronic fuel injection system volvo owners club. 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. 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. First tester for d jetronic of course was developed by bosch and had bosch no. I am also addressing the basic settings involved in adjusting the fuel mixture here.
Rebuild kit for bosch k jetronic fuel distributor 043871 0438100121 043891 043847 0043848. Have you tried googling k jetronic fuel injection system. It differentiates from the lejetronic for having, in addition to the injection system, also the ignition system incorporated in the command unit. Chapter 3 of d jetronic article series by drdjet describes function, repair and tuning of the brain of d jetronic. The l jetronic aod ils variants are electro nically controlled fuelinjection systems solenoidopersle jetronic in iha bosch technical instruclion series. Sep 15, 2012 everyhing about bosch d jetronic 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. If the inlet air temperature sensor fails its resistance tests, you cant service just the sensor. The bosch technical hotline is designed to provide specific assistance and practical support for routine work and to help deal with any problems arising in the course of motor vehicle servicing and repair.
How to remove, test and clean bosch cis gas engine fuel injectors yourself duration. The le jetronic command unit receives various input signals, from the various sensors that send precise information about the instant engine operation conditions. The following table is a guide to the fuel paths marked by each blue arrow in figure 6. Bosch ljetronic fuel injection troubleshooting, maintenance. The heart of this system is the airflow meter, which measures the amount of air being required by the engine.
Bosch licensed the concept to many automobile manufacturers. Bosch l jetronic fuel injection troubleshooting, maintenance. The bosch d jetronic is an analog electronic control unit ecu developed in the sixties, when microprocessors were not jet available for general use, but this is not to say that the complex calculations crunched digitally by screaming fast arithmetic logic units alu of todays injection ecus, were not perfectly capable of being processed by. Modifying bosch ljetronic fuel injection the black box. The details in this file refer to ke jetronic 19841987 on the us coupe and 4k the 1987. This video shows how to engineer modelbased functions for the lh jetronic 2. L jetronic fuel injection system the l jetronic is an electronically controlled fuel injection system which has the advantage of direct air flow sensing. Bosch k jetronic fuel distributor quick look youtube. The program counts on about 0 stores throughout brazil. The task of a fuel injection system is to supply precise amount of fuel to the combustion chamber at. Then tested and calibrated to manufacturers original specification. L jetronic electronic control unit ecu, airflow sensor, system relay, fuel pump relay, lambdasond oxygen sensor, vacuum switch, electric fuel pump, coolant. Mercedes suggests that special tools are required to adjust the mixture on the bosch ke3 jetronic cise fuel injection, such as is used on the 198891 560 series motors. Not much is standardized in d jetronic connectors, but all of them have a 25 pin amp connector with a spacing of 5.
Sensor bosch l jetronic injection air flow meter youtube. Mar 03, 2018 matching of the orings from the repair kit for bosch k jetronic 8 cyl fuel distributor. Mechanical fuel injection bosch k jetronic, bosch k jetronic fig. The bosch d jetronic is an electronical gasoline injection system which was introduced in 1967. The black box can be used on all ljetronic setups and some motronic as well for. Spec alfa romeo gtv6s, milanos, and 19821989 spiders, bmw e12 5 series and various 3 series cars, the datsun 280z and 280zx, all u. Mar 02, 2012 bosch k jetronic fuel distributor seal replacement duration. 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. This can increase fuel delivery and offer mod or performance support for older bosch fuel injection systems. Tips and tricks on how to easily assemble the distributor.
Wellfounded knowledge helps to save time and money. Install the fuel pump in the reverse order of removal. Bosch le jetronic bmw copyright equiptech boschlejetronic thereismuchconfusionabouttheactualtypeofinjectionsystemfittedtomanybmwmotorcarsduringtheperiod1980to. Playing with your k jetronic warm up regulator, or wur. This kit will fit all aluminum bosch k jetronic fuel distributors that do not have eha. The version that comes on the early e30 318i is l jetronic. The negative wire brown is connected to the negative terminal brown plastic plate and the positive wire blackred is connected to the positive terminal red plastic plate.
Bosch cis fuel injected engine cold and hot start problems duration. While new carburated engines were used in the european markets, vw adapted the l jetronic for the type 4 in the us due to more stringent emissions and fuel consumption regulations. Obviously us opel owners never saw it as opel quit importing in 1975. But you can also use bosch 0 280 150 035 or any other green bosch d jetronic injector. After a few days, you receive the repaired airflow sensor which is covered by the bosch exchange parts warranty. By club member john hall, who worked for volvo usa for many years. The le jetronic system is electronically commanded and injects the fuel in the intake manifold. This repair kit will service all 4 cylinder aluminum bosch fuel distributors that do not have eha. Bosch ke jetronic manual bosch kjetronic service manual bosch ke jetronic workshop manual bosch k jetronic manual mercedes bosch d jetronic fuel injection manual manual kjetronic l jetronic le jetronic kjetronic kjetronic deutsch kjetronic german bosch fsa 740 using manual bosch manual she bosch manual bosch gourmet 872 manual.
Since remakes are not always economically feasible, airflow meters that are sent to us are assessed in the bosch plant and refurbished if necessary. This adapter board upgrades the original processor of the lh jetronic. Le is the german designation of the european version of their air flow meter, with lu being the designation. K jetronic 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 k jetronic since its introduction, the k jetronic gasolineinjection system has proved itself in millions of vehicles. Whether or not you chose to go with megasquirt or learn the black arts behind bosch l jetronic, you will still have to learn the basics of fuel injection and the details of a particular system. Beginning in 1982 for the spider, and 1981 for the gtv6, alfa adopted bosch ljetronic fuel injection. Plus a forum where drdjet and other experts help with competent advice and repair instructions.
I have an s1 like yours, but the only thing ive had to adjust on this system is a slight tweak of the. 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. Modifying bosch ljetronic fuel injection the black box from hpsi motorsports duration. 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. Licensing some of boschs ljetronic concepts and technologies, lucas, hitachi automotive. Bosch djetronic einspritzventile selber uberholen diy. The key is to advance the timing to the peak power point. The black box can be used on all l jetronic setups and some motronic as well for. This little goody is a common culprit in kjet or cis problems, along with pumps, oneway valves, accumulators and fuel distributors. Bosch le lu jetronic injection air flow meter cross. Assuring you of quality and reliability at a cost effective price. Or lets have a look at one more version bosch cise continuous injection system electronic. Not only does this reduce a significant restriction in the intake, but it is a lot more accurate.
The bosch d jetronic electronic fuel injection system is composed of 3 major subsystems. Having recently sorted out a problem with mine, and hopefully understanding its. The injection has as function to provide the amount of fuel exactly dosed, necessary to. Bosch le lu jetronic injection air flow meter cross references part 2 duration. Carburetor vs efi e covers evolution of electronic fuel injection systems beginning with bosch k jetronic to bosch l jetronic part of a video. Looking on that ecu connector, pin 25 is on the right side where wiring harness exits ecu, pin 1. Now use the ohmmeter to check the resistance of the wire in the air mass sensor. The airflow sensor is therefore a functional component of the k jetronic. Bosch ke jetronic manual bosch k jetronic service manual bosch ke jetronic workshop manual bosch k jetronic manual mercedes bosch d jetronic fuel injection manual manual k jetronic l jetronic le jetronic k jetronic k jetronic deutsch k jetronic german bosch fsa 740 using manual bosch manual she bosch manual bosch gourmet 872. As stated in the video, you have access to all measures of the original software. Vaf valve air flow maf mass air flow tcr tarago previa estima 9095 map duration. Understanding d jetronic fuel injection an overview of bosch d jetronic in jaguar v12s 19751980 duration. The complete system contains the following components. The dedicated shade tree mechanic can do it, but needs to be wellinformed first.
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. Anyhow here is the link bosch k jetronic fuel injection manual. There is nothing to be gained from a megasquirt injection system except the opportunity to get it very wrong. This kit will service the following fuel distributors. Le is the german designation of the european version of their air flow meter, with lu being the designation of the us version, i.
These adjustments are intended to be followed by an actual exhaust gas co check to ensure. The lele2lu jetronic system is a development of the earlier bosch l jetronic fuel injection system. All sensors are used here to calculate when and how long to open the fuel injectors. Ljetronic the bosch ljetronic also called afcair flow controlled fuel injection was put into usspec type 4s in the last model year 1974.
Le jetronic injection vs aftermarket ecu and sensors. Reinstall the protective rubber boot and remove the ground jumpers from the harness. These are scans of wiring diagrams, both complete vehicle diagrams as well as important subsystems. There are several variations of the technology offering technological development and refinement.
Detach the operational relay set from the relay block as well as from the safety appliance located under the steering tube. About 1620 degrees btdc seemed to be right for me, and if youre not sure, about 12 is. Basically, it is pretty similar to the kjetronic with some changes and modifications. This adapter board upgrades the original processor of the lhjetronic. Onsomel jetronic systems, the air temperature sen sor is visible in the air flow meter inlet. A thorough understanding of the various components is required before working on k jetronic fuel systems. Be sure that the electric leads are connected to the proper terminals. Bosch continued development of the system, and it was last used in the d jetronic form in about 1976. 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. Whilst ive got it out of the car i thought id give you a quick look at a fuel distributor from a bosch ke jetronic or cis injection system. Then, the command unit processes this information received and calculate the appropriate fuel injection time, through an electric signal. K jetronic repair kit for aluminum fuel metering distributor. Unfollow k jetronic to stop getting updates on your ebay feed. Bosch le lu jetronic injection air flow meter cross references.
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