BMW 3 Series E21 V6 engine injection system

Characteristics of the fuel injection system
On «323i» the engine uses a mechanical fuel injection system «K-Jetronic» Bosch company. The principle of operation of the fuel injection system The fuel pump...

Features of the device and principle of operation
The fuel pump takes fuel from the fuel tank and delivers it through the filter and accumulator to the fuel quantity distributor. The amount of air drawn into...

Fuel dispenser-distributor
Fuel dispenser: 1 - dispenser-distributor of fuel; 2 - air flow meter; 3 - mixture regulator housing; 4 - gaskets; 5 - plug quality adjusting screw (mixtures);...

Throttle position adjustment
Remove the air supply cover and disconnect the throttle control rod from the lever. After loosening locknut 1, unscrew screw 2 until stop 3 is released. Touch...

Engine idle adjustment
Warm up the engine. Adjusting screw 1 for the amount of the mixture, set the crankshaft speed within 900±50 rpm. Remove the plugs from the exhaust manifolds...

Checking the pressure plate of the air mass meter
Make sure that in the initial position, the top edge of the air flow meter pressure disk is at the same level with the base of the cone of the air flow meter...

Checking the fuel dispenser
Remove the diode relay and the fuel pump relay from the mounting block. Wire a contact «87» fuel pump relay holder with terminal «+» battery, thus driving the...

Checking the performance of the fuel pump
Disconnect the fuel drain hose from the fuel dispenser. Attach a hose to the fuel drain fitting of the fuel dispenser and place a beaker under its free end....

Checking the starter injector
Unscrew the starting nozzle and place a vessel under it. Turn the crankshaft of the engine with a starter and check if the starting injector sprays fuel. If...

Checking the thermal time switch
Disconnect the plug connector of the thermal time switch. Connect a test lamp with one wire to the terminal «+» battery and others to the plug «W» thermal...

Pilot pressure regulator test
Disconnect the block from the control pressure regulator and attach the control wire BMW 61 1 440 to it. Connect an ohmmeter to the connecting contacts of the...

Pressure test
Connect one pressure gauge hose 13 3 060 with fittings 13 3 065 and 13 3 066 and with a two-way cock to the control pressure connection of the fuel dispenser,...

System leak test
Wait at least 30 minutes after stopping the engine. Connect a pressure gauge as mentioned above , by opening the two-way valve. Turn on the fuel pump directly...

Checking injection nozzles
Unscrew the nozzles. Mount the injector on the injector tester and adjuster and check the injection start pressure. Check the tightness of the injector. Adjust...

Possible malfunctions and methods for their elimination
Troubleshooting of the injection system and their elimination must be carried out with normal compression in all cylinders, with adjusted gaps in the gas...

Intake manifold and air filter parts
Intake manifold details: 1 - intake manifold; 2,3 - gaskets; 4 - starting nozzle; 5 - connecting tube. Air filter details: 1 - air filter and assembly; 2 -...