Re: [T3] EGR Valve elimination

[Jens Vagelpohl <jens@dataflake.org>]

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On Oct 26, 2004, at 20:13, John Fessenden fess wrote:

> any chance the timing curve is matched to the expected use
> of the EGR?  if so, then not having it functioning
> might increase the chance of ping.
>
>   http://www.asashop.org/autoinc/nov97/gas.htm

That's a very interesting article. I wonder if the timing curve change 
already existed for our engines (in my case it's a "EC" Type 4 engine 
with EGR system). My EGR system had been blocked off a while ago by 
some PO's technician, probably because the filters have been 
discontinued a long time ago. I wonder if there is any true adverse 
effect such as pinging.

One way to find out would be to put the timing curves for the 
EGR-equipped engine next to the curve for another similar engine 
without EGR and compare. It's not clear how much change would prove 
that EGR played a role in the advance curve.

jens

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