RE: [DML] More problems found (was Piston rings + sleeves)

["DMC Joe" <dmcjoe@xxxxxxx>]

David,

You are 100% correct. The reason I caution fooling with the timing is
because, as you know, many engine performance problems that pop up after a
service procedure are usually caused be a simple mistake like a misrouted
vacuum line or overlooked electrical connection. Owners who are "shade-tree
mechanics" can get themselves into some really deep and sometimes expensive
trouble if they perform unnecessary adjustments etc..

DMC Joe 

-----Original Message-----
From: David Teitelbaum [mailto:jtrealty@xxxxxxxxxxx] 
Sent: Sunday, January 16, 2005 12:53 AM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: Re: [DML] More problems found (was Piston rings + sleeves)




In my experience I too find that timing does not usually change much on most
cars. What I DO find is timing that was not set properly or a stuck
mechanical advance or a non-functioning vacuum advance. It is just good
practice when you do a tune-up to check the base timing and make sure the
mechanical AND vacuum advance is functioning properly.
Most manuals ask that you check the timing and not try to adjust it if it is
off only 1 or 2 degreees. You can't do all of the other adjustments
correctly if the base timing is not at least close to 13 degrees and the
power and economy will be terrible. The days of setting cars up by sound and
feel is long gone. You now have to have a timing light and tachometer. An
air-fuel meter is also real nice to have. A scope is even better. A scanner
is essential for all modern cars (not Deloreans). 
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "DMC Joe" <dmcjoe@xxxx> wrote:
> 
> Dave,
> 
> You are correct on all of your suggestions but I would like to add the 
> following concerning engine timing.
> 
> To Dani B.; Dave is correct about checking the engine timing, but if
it's
> off, don't readjust it. The PRV-6 timing does not drift out of 
> operating range. If you're having problems with performance issues I 
> would not
suggest
> to fool with the timing unless it was adjusted after the engine 
> started running poorly. Here is an example. Over the years I have 
> found that the factory setting of the timing will remain within 2 
> degrees of the
specified
>








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