MS43 DME Removal Precautions – EGS Failure Avoidance Model:Īll vehicles which have a MS43 control unit.Īfter the ignition has been switched to the off position, the MS43 control module may stay active, this is due to the DM-TL test.Įnsure the ignition key is in the off position, and allow 3 minutes to elapse before disconnecting the DME. Reprogram the DME with CD23 after loading the CD23 update.Īfter reprogramming align the DME-EWS, clear all adaptations and all fault codes in the DME/EGS. This is due to a calibration in the DME/ECM. These vehicles will hesitate and stumble when idle, especially when turning the steering wheel.
Install an external resistor in the NTC line.Į46 330xi and E36 Z3 with M54 3.0 Hesitates, Stumbles at Idle Model:ģ30xi with M54B30 produced up to August 2000, Z3 roadster coupe with M54B30 produced up to August 2000. This is due to the internal re-programming of the Motronic Control Unit was not able to compensate for the elimination of the external 560 OHM resistor. If the engine is cold or warm, the vehicle will emit a hesitation or have poor throttle response during the first few minutes of starting.
If the DME ignition fails it may cause over heating which in turn will damage the ignition coil. The primary harness connectors of ignition coils from cylinder banks 1-6 and 7-12, need to be checked and locked into position.Īll vehicles with M1.1 and M1.2 DME fuel injection systems.
The primary harness connectors may not have been fully locked onto the ignition coil housings during production. Ignition Coil Primary Harness Connectors Model: If the metal part of the wire connector makes contact with the metallic coil housing an electrical short circuit will occur. The wire to the positive terminal of the ignition coil has been installed incorrectly. The engine is difficult to start or does not start, displaying erratic cranking. If this gives a positive result then either clean or replace it.Įnsure the secondary ignition cables are working sufficiently to ensure a good fit in the distributor cap. Therefore, if changing the distributor, the rotor must also be changed, or vice versa to remain compatible.Įnsure there are no cracks, wear or damages in the distributor cap. For example the old style distributor is not compatible with the new style rotor. When using the new distributor cap and rotor, which have been introduced into production since December 1988 they must not be mixed. Modified Distributor Cap and Rotor Model: Remove the faulty EWS module and replace with EWS 3D module SW version 06.
This is due to a software error in EWS 3D module SW version 05.
By using the high performance platinum spark plug the benefits will include increased service life, consistent operation throughout the service life, improved cold start performance, better idle quality and acceleration, less susceptibility to misfire.įault code 209 will be set in the DME due to the engine although it will crank it does not start. High Performance Platinum Spark plugs allow the spark to slide over the insulator preventing sooty deposits forming. Sooty deposits forming on the insulator which can lead to spark plug misfire. High Performance Platinum Spark Plug Model:
* This change does not effect vehicles equipped with ignition distributor P/N 0 237 002 080.
This is due to the Bosch ignition distributor P/N 0 237 002 096 falling at the bottom of the tolerance band when the revs extend between 20 RPM.Įnsure the ignition timing has been changed to meet the new recommendations (see notes above).Įnsure the CO has no faults, if so correct.įit a field fix revised timing decal onto the drivers side fender well. When acceleration revs extend between 20 RPM a surge occurs. 85 – 1.8-5 Model:ģ18i produced from October 1983 to December 1984 Surges while acceleration and poor driveability at low speeds.įrom 12 th May 1984 all model 318i vehicles have had the ignition timing requirements altered from 15 degrees plus/minus 1 degree at 2000 RPM to 26 degrees at 4000 plus/minus 50 RPM. BMW Engine Electrical System Ignition Harness