Re: [Chrysler300] Update on the engine/compression dilemma

[Bruce Paul <b_paul_ncp@xxxx>]

I have some doubts about the carbs causing "hard"
engine missing. How about pulling off each spark plug
wire when the engine is missing and find out which
cylinder(s) aren't doing their jobs? You only take off
one wire at a time and then put it back on. Only the
cylinders that are working properly will cause
significant changes when their spark is interrupted. 

Bruce Paul-Cherry Hill, NJ



--- Jonathan Sacks <jwsacks@xxxx> wrote:
> Hi all,
> 
> Before I say anything I want to say thanks to the
> club
> and its members for the overwhelming response I
> received from the posting of my question regarding
> the
> loss of compression in two of the cylinders of my
> 413.
> I guess I shouldn't be surprised now, but it still
> amazes me, the amount of knowledge and generosity
> that
> can be found on this email network. Thanks again, I
> couldn't imagine doing it without your help.
> 
> Now to the problem...after hearing the responses of
> some of the members who suggested I need to work
> through the problem methodically, I decided to have
> the engine compression retested manually as a
> back-up
> to the computer readings that read low compression
> in
> two cylinders.
> 
> After pulling each plug individually and testing
> each
> cylinder with the other seven plugs in, it was
> determined that compression was between 100 and 115
> in
> each cylinder! Has anyone else experienced such a
> discrepancy between the computer and gauge readings?
> 
> So now, what I'm left with is a relatively smooth
> ride
> when it starts up which degenerates into a hard
> miss,
> with accompanying vacume loss on the hard miss, as
> the
> engine begins to heat.
> 
> Now the carburator doesn't sound so far fetched to
> me.
> But the very reputable gentleman who rebuilt the
> carb
> says that's definitely not the problem. And frankly,
> the carb wasn't in bad shape before it was rebuilt.
> 
> Both the engine and the carb shops I know to be
> well-repected businesses. I'm now wondering if it
> could have been something that was done/or not done
> during the installation process. I missed the
> discussion about lubing the cam lobes and getting
> the
> oil pressure for the cam bearings and mains brought
> up
> before start. The install was done without me, so
> maybe it could have been one of those things. But
> then
> again, the compression would be off then, wouldn't
> it?
> 
> Any ideas, assuming the compression is okay but
> she's
> still hard missing, with accompanying vacume loss?
> 
> As always, thanks for the advice.
> 
> 300ly,
> Jonathan 
> 
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