Idle Stabilizer, Checking

Idle stabilizer, checking

Work sequence

Note: If engine is difficult to start, does not start, or engine misfires/stalls, proceed as follows:

- Disconnect both wire plugs from idle stabilizer
- Check contact pins and sockets of both idle stabilizer connectors for correct position or damage
- Connect both plugs together
- Start engine
If starting troubles are still experienced, idle stabilizer control unit is not defective
If engine starting troubles are eliminated, but troubles start again after reconnecting plugs to idle stabilizer unit, idle stabilizer unit must be defective; replace

- Connect VW 1367 tester or equivalent according to manufacturer's instructions
- Apply parking brake

WARNING: No one should be allowed to stand in front of vehicle during this test. Vehicle's wheels must be blocked

- Apply foot brake
- Start and accelerate engine (i.e. to 2500-3000 rpm) briefly
- Let engine idle and note ignition timing
- Select 4th gear and slowly engage clutch
As engine speed drops below 940 rpm ignition timing must move in "advance" direction

- If not, replace idle stabilizer control unit