Re: Need Help From the Experts (Shawn, Andy) or Anyone Else

["Smokinn" <smokinn@crestview.sbceo.k12.ca.us>]

Thanks Shawn,   I checked the knock sensor system (test from Haynes manual)
by performing the test with a test light.  It checked out fine according to
the manual, however it does recommend having it checked out by a computer
test unit if the test doesn't pass.

If I drive his car at about 30-35 mph, running at about 3k RPM +, it will
tap, but if I let off the throttle just enough to maintain a steady
speed...it stops and doesn't tap anymore until I press the accelerator.
Same applies at highway speeds (except for the fact that it's less
noticeable because of the road noise, but you can still hear it if you
really listen for it.......I bet it's loud outside the vehicle :-)   I
talked to one guy who believed it to be "piston slap", but doesn't piston
slap normally apply to race cars and goes away after the engine is warm?


Gerry
http://www.geocities.com/motorcity/downs/7808/smokinn.html
87 Scirocco  16v  Euro'ed Out!!
92 Jetta GL  8v
-----Original Message-----
From: Shawn C Meze <skerocdriver@juno.com>
To: smokinn@crestview.sbceo.k12.ca.us <smokinn@crestview.sbceo.k12.ca.us>
Cc: scirocco-l@privateI.com <scirocco-l@privateI.com>
Date: Tuesday, November 18, 1997 12:14 AM
Subject: Re: Need Help From the Experts (Shawn, Andy) or Anyone Else


>
>On Mon, 17 Nov 1997 20:32:37 -0800 "Smokinn"
><smokinn@crestview.sbceo.k12.ca.us> writes:
>>I have been working on this guys 88 Scirocco 16v.  Before I tear this
>guys
>>engine down needlessly, has anyone ever come across a tapping at high
>RPM.
>
>
>Yes I did once. It was rod knock. Spun a bearing he next day.
>
>
>>More noticeable around 3K, with the engine under a heavy load.  Doesn't
>>really sound like a knock.  I was thinking it was his timing.  Checked
>out
>>fine though.
>
>
>When it knocks under load, to me its almost always got to be the KS
>system. Are you sure everything is working right?? Just because the
>timming is set perfectly doesn't mean the KS system is working. Be sure
>to look into that.
>Now, if it tapped at high rpm under any throttle position, then it would
>be low oil pressure to the lifters. If its rod knock, you would know
>because it sounds like the bottom end is comming apart. (Because it IS!)
>
>
>>Car runs great, except for difficult hot starts he complains
>>about, not immediately after he shuts the engine down, but maybe an hour
>or
>>two later.  (Control pressure regulator maybe?)  Shawn.......need help
>on
>>this one guys before I ask this guy to cough up some big bucks to have
>his
>>engine rebuilt.
>
>
>Its not the engine that is at fault here, IMHO. I think its the related
>components that are the problem. It sounds like the hot/warm start
>problem could be caused by the fuel accumulator is my first guess. Theres
>alot to check on the fuel system. Id say your just gonna have to check
>each item and rule them all out before doing anything drastic like an
>engine tear down.
>Check all the electrical connections, make sure they're good ect. Check
>for good grounds ect.
>
>Mike told me to replace my Knock sensor on my GLi because the wire was a
>little frayed. He said if they are damaged at all they dont perform like
>they should. So if the knock sensor wire is frayed or damaged even a
>little bit, it might be a good idea to replace it. (I did.)
>HTH!!
>
>
>              Shawn Meze
>86' Jetta GLi           82' Scirocco GTi
>The Fastest, Quickest, Cleanest and
>best looking Scirocco in all of San Diego!
>http://home1.gte.net/vwfan/meze/hello/
>


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