No spark for hot start - '90 200tqw
blur at sympatico.ca
Wed Jul 25 22:04:18 EDT 2001
scott miller wrote:
> Im getting no spark when cranking the engine when the engine is hot. Once
> it cools to some unknown point, it starts immediately and runs great, and
> runs great when hot until shut off. Thereafter, no start until cool. No
> problem on recent cool day (70F), but consistent problem on warmer days. It
> seems to be gradually happening when cooler. Stock engine, no recent mods,
> repairs, damage. Air conditioner has been intermittent. Any thoughts?
> Ignition coil? Hall sensor? What components are specifically involved in
> starting, not involved thereafter, and could be heat sensitive?
> Is there an exorcist in the house?
I had a very similar problem recently, it turned out to be the crank
position sensor (ignition timing reference sensor). It read the
required 1 kohm resistance when cold but went open when hot and the
signal died as well. Took me a while to find that one.
More information about the quattro