Re: Engine Problem Troubleshooting

["David Zanotti" <zanotti@wmis.net>]

More investigation:
Car is ok until normal temps are reached.  I tested injector seals and
looked for split vacuum lines.  No problems found.  Checked connections to
OXS and at OXS harness.  (did find a broken exhaust mount)  All connections
look good.  Checked coolant temperature sensor connection.  Looks good.  I'm
ruling out timing at the moment since cold running is normal.  No strange
puddles and engine temps seem normal.    My next step is to check the
differential pressure regulator and it's inputs.  Anyone have that special
test harness described in the Bentley?    I'm hoping the testing leads me to
the OXS, since it will be the easiest to deal with.  I'm wondering if a
simple procedure of unplugging sensor inputs and evaluating how the car runs
can do the same thing as all of the recommended electrical tests.  Any
experience?

David Zanotti

-----Original Message-----
From: T Berk <tberk@mindspring.com>
To: David Zanotti <zanotti@wmis.net>
Cc: scirocco-l@scirocco.org <scirocco-l@scirocco.org>
Date: Wednesday, May 23, 2001 4:07 PM
Subject: Re: Engine Problem Troubleshooting


>
>
>> My car is an '88 16v...believe it is
>> CIS-E.
>>
>> David
>>
>
>OK, Lets consider the following: When cold, the car sprays extra fuel in
>the mix to enriched it while it gets up to temp. Then it leans out
>trying for that elusive perfect balance between rich and lean.
>
>1. Something is not right when @ normal temps.
>2. It could be an imbalance in air to fuel ratio OR it could be
>something else like timing but it's masked by the over rich condition of
>a cold start.
>
>What are your temps like when you are driving around? Are you missing
>coolant you can explain? Oil?  Any strange puddles?
>
>I'd run a big bottle of Techroline through it on a quarter tank of gas
>and see if it clears up the low end trouble. Might be a simple as poor
>misting by the injectors.
>
>TBerk
>How much you going to pay me if I accurately diagnose it?    : ])
>PS - If I keep this up I will have to drop a 16v in the wabbit.


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