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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