Re: 16V Hard Start

["Bill Scarince" <scarince@gte.net>]

Have you already verified that the cold-start valve is not leaking and that
the thermo-time switch is operating correctly?

Have you verified that the fule pressure accumulator is working?  I don't
know how to check this w/o a fule pressure gage, but if it's not working
your car will be *very* hard to start when hot.

Bill

----- Original Message -----
From: "Christian Els" <tiAn@usiw.net>
To: "Scirocco List" <scirocco-l@scirocco.org>
Sent: Friday, August 25, 2000 3:41 PM
Subject: 16V Hard Start


> My car has become increasingly hard to start when it warms up. It starts
OK
> from dead cold, but as the car and the ambient temperature increase it
> becomes unnervingly hard to start reliably. This afternoon I had to
> disconnect the O2 sensor before it finally caught. That points to a
mixture
> issue, in my mind. Yes?
>
> Driveability once started is good, maybe just a little weak on the bottom
> end.
>
> I just finished nailing down the mixture (thanks, Bill Scarince), ignition
> timing, the air flow plate height, and the O2 sensor is only ~500 miles
old
> (and returns correct values).
>
> I am unable to clarify to myself what role the knock sensor might play in
> this problem after reading Bentley. I would think that if it is bad, that
> would not manifest itself as a starting problem, but rather general
> driveability, correct?
>
> I am starting to wonder if the ECU is faulty rather than adjustment issues
> elsewhere in the system. Does this seem a reasonable conclusion, or I am
> jumping to that too hastily? I have not yet verified fuel pressure, but
both
> pumps are ~500 miles old, and after starting the car does drive just fine.
>
> TIA,
>
> Christian Els
> 87 Scirocco 16V
> stuff...
>
>
>
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