Attention: With Motronic installed, the idle speed is electronically controlled and cannot be adjusted.
L-/LE-Jetronic
Connect instruments for measuring the number of revolutions and the CO content in accordance with the instructions for their use.
Warm up the engine to operating temperature. The oil temperature must be at least 60°C.
Check ignition timing (see section «Checking and adjusting the ignition timing»).
Check intake system for leaks. To do this, use a brush to moisten all the connections of the intake device with gasoline. If at the same time to increase the engine speed for a short time, then air will be sucked in in places of loose fit. Locate and eliminate leaks.
Attention: Do not inhale fuel vapors - poison! Avoid splashing gasoline on hot parts and on the ignition system. Fire hazard!
Check the air filter element.
Turn off all electrical consumers.
Detach the crankcase breather hose from the cylinder head cover and route it so that only outside air can be drawn in.
Check engine idle speed. Setpoint see table in section «Ignition system». In case of deviations, adjust the idle speed with the adjusting screw at the stop of the throttle valve.
Check CO content. Setpoint see table in section «Ignition system».
If the CO content deviates from the set value, remove the seal from the CO content adjusting screw on the air flow meter.
Disconnect the hose leading to the activated carbon tank from the throttle valve nozzle and close the hose and fitting with plugs.
Adjust the set value of the CO content by turning the adjusting screw (arrow). This requires a 5 mm Allen key, eg HAZET 2100-5. Turning it clockwise increases the CO content, while turning it counterclockwise decreases it.
After the adjustment, place a new seal.
Check the enrichment mode at partial loads. To do this, disconnect and plug the vacuum hose from the pressure valve. The CO content should increase markedly to around 2.5%. Then reconnect the hose.
Turn off meters.
Connect the crankcase breather hose.
Throttle cable adjustment
Attention: The throttle cable is sensitive to bending and must be handled with extreme care during installation. Even a slight bend can cause it to break off later. Therefore, it is forbidden to install cables with bends.
Press the gas pedal all the way (full throttle position) and fix it in this position with an appropriate board. inserted between the pedal and the seat.
Press the throttle lever -2- to the full throttle position and screw in the adjusting nut -1- until the throttle cable is tightened.
Disconnecting the throttle cable from the throttle lever
Operate the throttle lever -2- to unload the throttle cable nipple.
Compress clamp -3- and press it away from throttle valve lever.
Disconnect the throttle cable through the slot on the throttle lever.
Pull the cable sheath -5- out of the rubber lug -4-, use a screwdriver to press the rubber lug out of the holder and pull the cable through the slot in the holder.
Connection
Insert the throttle cable through the slot into the hole of the throttle lever, put and press the bracket.
Give a little gas with the throttle lever, insert the cable into the hole in the holder, press the rubber tip and insert the cable sheath into it.
Check throttle cable adjustment.
Checking the performance of the fuel pump
Connect a voltmeter to the fuel pump.
Disconnect the fuel pump relay.
Jumper terminals -87b- and -30- on the multi-pin connector, the pump should start working and the voltage at the pump should be at least 11.5 V. Otherwise, check the battery, wiring and connections.
Connect ammeter between terminals -87b- and -30- on multi-pin connector. The consumption of the fuel pump must not exceed the following values:
- 318i cars with K-Jetronic: 9.5 A;
- cars with L-Jetronic OME produced before August 1985: 6.5 A;
- issue since September 1985: 5 A.
Disconnect the fuel supply hose from the pressure regulator and lower the hose into a beaker with a capacity of about 3 liters.
Bridge terminals -87b- and -30- at multi-pin connector and let fuel pump run for approx. 30 seconds. Amount of pumped fuel:
- 318i vehicles with L-Jetronic, 320i: 700 cm3;
- 325e, 325i: 850 cm3.
If the fuel pump output is low, replace the fuel filter and check the output again. If the performance is still insufficient, replace the fuel pump.