BMW 5 Series E12 car fuel injection system

520i Fuel Injection System Specifications
Kugelfischer injection system Injection pump brand and type: Kugelfischer PL 04-124 01 C1. Brand and type of injection pump drive belt: Synchroflex 12 T 5/750....

Fuel injection system specifications «525i», «528i», «528iA», «535i»
L-Jetronic fuel injection system On BMW car engines "525i", "528i", "528iA" and the "535i" used the L-Jetronic electronically controlled intermittent fuel...

Tightening torques for main threaded connections
Tightening torques of main threaded connections, kgf·m Fuel supply pipe nipple, thread M 14 x 1.5 (maximum residual moment on the body), no more than: 1.5....

Fuel injection system parts «Kugelfischer»
Fuel injection system parts "Kugelfischer": 1 - connecting rod; 2 - fuel supply lines from the pump to the injectors; 3 - toothed pulley of the pump drive; 4 —...

Scheme of fuel injection system «K-Jetronic»
Scheme of fuel injection system "K-Jetronic": 1 - fuel tank; 2 - fuel pump; 3 — fuel storage tank; 4 - fuel filter; 5 — fuel dispenser; 6 - supply pressure...

Functional diagram of the fuel injection system «L-Jetronic»
Functional diagram of the fuel injection system "L-Jetronic": 19 - fuse no. 6; 20 — ignition coil; 24 — starter; 30 — starter relay; 71 - fuel pump; 90 — relay...

Removal and installation the injection pump of the Kugelfischer system
Drain the cooling system. Remove the air filter assembly. Disconnect the fuel lines from the pump. Remove the fuel drain hose 1 (see photo), oil supply pipe 2,...

Adjusting the amount of fuel injected by the Kugelfischer system
Remove the connecting rod and check the distance "A" (see photo) between the rod end axes using template 6071, the nominal value of which is 85 mm. The amount...

Throttle synchronization of the «Kugelfischer» system
Remove the cover, unscrew screw 1 (see photo) so that it does not touch eccentric 3. Loosen lock bolt 2. Lock the fuel supply adjustment lever with lock 6075...

Adjusting the full throttle position of the Kugelfischer system
Lock the fuel supply adjustment lever with lock 6075 by inserting it into hole 5 (see photo) and screw the stop screw into the fuel supply adjustment lever...

Adjusting the engine idle speed of the «Kugelfischer» system
Idle speed adjustment must be performed on a warm engine. Before adjusting, make sure that (see photo): the air supply regulation cone of the heating sensor...

Air flow meter for the K-Jetronic system
The air flow meter is a Venturi tube 1 (see picture), inside which the pressure disk 2 moves, secured to the movable lever 8. The displacement of the pressure...

Fuel dispenser-distributor of the K-Jetronic system
The metering distributor regulates the amount of fuel supplied to the injectors in proportion to the amount of air supplied. The fuel metering distributor...

Control pressure regulator of the K-Jetronic system
The control pressure regulator ensures enrichment of the working mixture entering the combustion chambers during engine warm-up. On a cold engine, the...

Additional air supply valves of the K-Jetronic system
This valve serves to increase the crankshaft speed during engine warm-up. When starting a cold engine, the additional air supply channel is opened by the...

K-Jetronic system injectors
The injectors open automatically under a pressure of 3.3 kg/cm² and do not dose fuel.

Checking the control pressure of the K-Jetronic system
Checking the control pressure The control pressure is checked on the vehicle using the KOEP 1034 tee, installed on the discharge pipeline connecting the...

Adjusting the idle speed of the engine of the K-Jetronic system
The carbon monoxide (CO) content in the exhaust gases is regulated by screw 1 (see photo) with a hexagonal recess for a key, closed with a plug. The CO content...

Possible malfunctions of the fuel injection system «K-Jetronic»
Possible malfunctions of the fuel injection system "K-Jetronic", their causes and methods of elimination

Checking the injectors of the L-Jetronic system
The best way to check the injectors is with the Bosch 6E84.100.202 control device in positions 6-10 of the program switch. If you don't have one, you can check...

Adjusting the idle speed of the engine of the L-Jetronic system
Using the mixture quantity adjusting screw, set the idle crankshaft speed within 900±50 rpm (when turning the screw clockwise the rotation speed decreases). At...

Checking the L-Jetronic additional air supply valve
The valve should open fully when the coolant temperature is 20*C and close when it rises to 70°C. To check the valve on a cold engine, remove the valve box and...

Checking the L-Jetronic system thermovalve
To check the condition of the thermal valve, disconnect hose 1 (see photo) going to the vacuum regulator of the ignition distributor sensor, disconnect hose 2...

Checking the thermoelectric switch of the L-Jetronic system
Remove the air filter. Turn on the ignition. As soon as the intake air temperature exceeds approximately 14°C, the switch should close and both its contacts...

Checking the thermal time relay of the L-Jetronic system
Remove the air filter. Turn on the ignition, disconnect hose 1 (see photo) from the thermal time relay and hose 2 from the tee of the vacuum ignition regulator...

Possible malfunctions of the L-Jetronic system
Possible malfunctions of the fuel injection system "L-Jetronic"

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