Volkswagen Golf, Jetta, Passat with DIGIFANT II ECUs 1988/90
- Common ECU failure symptoms

Symptom 1

    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 click here for full address and quotation request form.

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