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Problems

Vehicle fails to start following work on clutch, gearbox or starter motor

GOLF/JETTA/PASSAT MODELS with DIGIFANT II engine management systems 1988 to 1990. ECU part numbers 037 906 022 AN or BC or E or N.

Symptom

VEHICLE FAILS TO START following work on clutch, gearbox or starter motor – fault causes continuous injector operation with
extensive petrol flooding of cylinders
– or, rarely, no injector pulses.

CAUTION: THIS PROBLEM IS CAUSED BY FAILURE TO PROPERLY REPLACE CLUTCH HOUSING EARTH STRAP and/or ENGINE EARTH STRAPS. WHEN STARTER MOTOR IS OPERATED, MOTOR CURRENT RETURNS THROUGH ECU CAUSING IMMEDIATE AND EXTENSIVE ELECTRICAL DAMAGE TO ECU.

BEFORE CONNECTING NEW OR REPAIRED ECU:-

1) Thoroughly check all engine, gearbox and starter motor earth straps and connections.

2) BEFORE STARTING ENGINE ensure petrol has drained from cylinders, then replace oil and oil filter (petrol flooding will have rendered oil useless and significantly reduce engine life). After running engine for one minute, replace oil and filter AGAIN – YES.

3) SIGNIFICANT FIRE RISK – wear protective clothing and have professional fire extinguisher at hand!
Digifant ECUs can be repaired and rebuilt by CES.
Please see below for quotation request form.