Glow Plugs

WARNING: This page is about a different car, the 1984 Volkswagen Rabbit, 1984 Volkswagen Quantum, and 1984 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Do not use jumper battery with voltage rating greater than 12 volts as glow plugs are voltage sensitive and would be damaged.

During cold starts, glow plugs are used to preheat swirl chambers. When current is applied, glow plugs become red hot. Coolant temperature sensor connected to time circuit in glow plug relay controls pre-heating time.

To start cold engine, pull out cold start knob which is on dash by steering column. Turn ignition switch to "ON" and make sure glow plug light comes on. When glow plug indicator light goes out, crank engine. Do not operate starter longer than 10 seconds. If engine does not start, wait 30 seconds. Rerun glow plug cycle and try to start engine again.

At temperatures above freezing, do not depress accelerator pedal. At temperatures below freezing, depress accelerator pedal while cranking and slowly release pedal as engine starts. About 2 minutes after engine starts, push cold start knob in fully.