Vapor Lock 2
Huw Powell
audi at mediaone.net
Sat Jun 30 00:14:42 EDT 2001
measure the starter current draw or voltage while cranking hot yet?
scott miller wrote:
>
> To recap: it will crank, but won’t start or even fire when the engine is
> hot. It starts immediately after cooling. Hot idling is fine. The problem
> has gotten gradually worse, with no repairs recently. 10v, 200k, 100k on
> injectors, 20k on fuel pump, a/c recently died.
>
> I replaced the check valve on my fuel pump, no change. That was my local
> experts theory, the pressure was bleeding off the line and allowing it to
> boil. I loosened the fitting on the filter and got a good spray of fuel
> after it failed to start just now, so there is some pressure.
>
> So far the responses from the list blame the injectors, but I’m doubtful.
> When my injectors went bad last time, it never got worse than a delayed
> start. I mean just a couple extra compression strokes. That was with
> several leaking injectors. This time I can crank for several minutes, get
> it to fire on starter fluid, and still not get it to run. Even after much
> cranking and firing on starter fluid it, won’t run until it cools for at
> least 30 minutes. I’m definitely purging the engine of residual fuel from
> leaky injectors with all the cranking and running on ether. It’s definitely
> lacking one of the elements of combustion when hot.
>
> I’ll check the injectors next, but could it be electrical or a vacuum line?
> The after-run blower checks good. The turbo hoses look good. All the usual
> problem vacuum lines are fairly new.
>
> My wife was excited about my getting a newer used quattro this fall/winter,
> now she’s getting skeptical. This is not good!
>
> Scott Miller
> ’90 200tqw
> Holland, MI
> _________________________________________________________________
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--
Huw Powell
http://www.humanspeakers.com/audi/
http://www.humanthoughts.org/
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