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Re: Easy Staring with Fuel Pump Prep Run

> The fuel pump on my 1990 Audi 100 normally runs
> for about 3 seconds when the ignition swith is
> turned to run (not start).  Although this seems
> like a great idea, to build up fuel pressure before
> starting, my books say the only time the pump is
> supposed to run is when cranking, and then afterwards
> when the engine is running (sucking air).
> Could I have a check on this?  Those of you with
> 1989 t0 1991 Audis, can you hear your fuel pump
> run for about 3 seconds when the ignition switch
> is turned on (to run)?

IME this is fuel pump relay dependent and is entirely unpredictable...

Huw Powell


82 Audi Coupe; 84 4kq; 85 Coupe GT; 73 F250