Bosch L Jetronic Fuel Injection Troubleshooting .
Bosch L-jetronic Fuel InjectionTroubleshooting, Maintenance & Repair
Introduction:i - Table of Contentsii - Table of Contents (continued)iv - Introductionv - Introduction (continued)Diagnosis: Starter runs, engine will not start:1 - Diagnostic process2 - Air Intake System diagrams3 - Diagnostic process (continued)4 - Diagnostic process (continued)5 - Diagnostic process (continued)6 - Diagnostic process (continued)7 - Diagnostic process (continued)8 - Diagnostic process (continued)9 - Diagnostic process (continued)10 - Diagnostic process (continued)11 - Diagnostic process (continued)12 - Diagnostic process (continued)Diagnosis: Starter runs, engine will not start when cold:13 - Diagnostic process14 - Diagnostic process (continued)Diagnosis: Starter runs, engine will not start when hot:15 - Diagnostic process16 - Diagnostic process (continued)Diagnosis: Engine starts then stops:17/18 - Diagnostic processDiagnosis: Engine idles too high:19 - Diagnostic process20 - Diagnostic process (continued)21/22 - Diagnostic process (continued)
Diagnosis: Engine idles too low, or rough idle:23/24 - Diagnostic processDiagnosis: Hesitation:25/26 - Diagnostic processDiagnosis: Inadequate power & poor performance:27 - Diagnostic process28 - Diagnostic process (continued)Diagnosis: Excessive fuel consumption:29/30 - Diagnostic processDiagnosis: CO value too high:31 - Diagnostic processElectrical diagrams:32 - Electrical component location33 - Check coolant temperature sensor resistance34 - Check thermo time switch35 - Check air flow meter36 - Check air flow meter (continued)37 - Check air flow meter (continued)38 - Check voltage output to fuel pump @ relay set39 - Check voltage input to relay set from ignition switch40 - Check voltage input to fuel pump relay of relay set41 - Check input voltage to control relay of relay set42 - Check input voltage to control relay of relay set (continued)43 - Check output voltage from control relay of relay set44 - Check output voltage from control relay of relay set (continued)45 - Check output voltage from control relay of relay set (continued)46 - Check voltage signal from coil to control unit47 - Check ground circuit for control unit48 - Check ground circuit for control unit (continued)49 - Check ground circuit for control unit (continued)50 - Check air temperature sensor resistance
51 - Check input to fuel pump relay of relay set52 - Check voltage @ auxiliary air regulator53/54 - Check full throttle contacts of throttle plate switchFI Maintenance: 1500cc engine:55 - Maintenance process56 - Maintenance process (continued)57 - Maintenance process (continued)58 - Maintenance process (continued)59 - Maintenance process (continued)60 - Maintenance process (continued)61 - Maintenance process (continued)62 - Maintenance process (continued)63 - Maintenance process (continued)64 - Maintenance process (continued)FI Maintenance: 2000cc engine:65 - Maintenance process66 - Maintenance process (continued)67 - Maintenance process (continued)68 - Maintenance process (continued)69 - Maintenance process (continued)70 - Maintenance process (continued)71 - Maintenance process (continued)72 - Maintenance process (continued)Appendix: FI electrical system:73/74 - Electrical system diagram75 - Test specs76 - Test specs (continued)
38 - Check voltage output to fuel pump @ relay set 39 - Check voltage input to relay set from ignition switch 40 - Check voltage input to fuel pump relay of relay set 41 - Check input voltage to control relay of relay set 42 - Check input voltage to control relay of relay set (continued)
4B 2 Bosch K and KE fuel injection systems General information The fuel system comprises a centrally mounted fuel tank, electrically-operated fuel pump and Bosch K-Jetronic or KE-Jetronic continuous injection system according to model. The system is used in conjunction with a turbocharger o
Mechanical fuel injection - Bosch K-Jetronic, Bosch K Jetronic Fig. 6.4 Figure 6.4 shows the fuel distributor, primary pressure regulator and air flow sensor from the Bosch K Jetronic system. The following table is a guide to the fuel paths marked by each blue arrow in figure 6.4. A To fuel injectors B To warm up regulator
The Bosch D-Jetronic electronic fuel injection system is composed of 3 major subsystems: the air intake system, the fuel system, and the electronic control system. The D-Jetronic system uses constant fuel pressure and flow, so that only injection duration needs to be modified to control air/fuel
Bosch developed an electronic fuel injection system, called D-Jetronic (D for Druck, German for “pressure”), which was first used on the VW 1600TL/E in 1967. Bosch superseded the D-Jetronic system with the K-Jetronic and L-Jetronic systems for 1974, though some cars (such as the Volvo 164) continued
ultimately used in the Porsche 912E during the 1976 model year. The L-Jetronic was a further development of the D-Jetronic found in the Porsche 914 1.7L and 2.0L engines. The original L-Jetronic found in the 914 1.8L engine was further . The following diagram provides an over
Diesel fuel-injection systems: An overview Fields of application 4 Technical requirements 4 Injection-pump designs 6 Mechanically-controlled (governed) axial-piston distributor fuel-injection pumps VE Fuel-injection systems 8 Fuel-injection techniques 9 Fuel supply and delivery 12 Mechanical engine-speed control (governing) 22 Injection timing 29
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. K-Jetronic is a continuous injection system (CIS), which means that the fuel injectors receive and produce a constant flow of fuel, provided
Bosch 500mm Aerotwin Wiper Blades Bosch 660mm Aerotwin Wiper Blades N/A 1210.AR55N Bosch 550mm Aerotwin Wiper Blades N/A 1210.AR60N Bosch 600mm Aerotwin Wiper Blades N/A 1210.AR61N Bosch 610mm Aerotwin Wiper Blades Bosch 650mm Aerotwin Wiper Blades Bosch 700mm Aerotwin Wiper Blades Bosch 710mm Ae
