Since it does not appear to be a compression issue, I would look at the
coil, distributor, timing chain, cam sensor or equivalent (adjustment for
wear in the timing chain?), or something already changed that was defective
or not the correct part. Perhaps put a scope on the ignition and see if it
is trying to fire properly.
On Sun, Jun 3, 2012 at 8:23 PM, OK Don <okd...@gmail.com> wrote:
> Replace Cheby with Mercedes ----
>
> On Sun, Jun 3, 2012 at 9:06 PM, Peter Frederick <psf...@earthlink.net
> >wrote:
>
> > Coil.
> >
> > Or coils, depending.
> >
> > Also check fuel pump pressure and delivery.
> >
> > Peter
> >
> >
> > On Jun 3, 2012, at 9:00 PM, Dieselhead wrote:
> >
> > A young man who has made quite a favorable impression on me is having
> car
> >> trouble, and is asking for help. Being a Shovey gasser, I don't have
> >> any/many ideas, so I thought i'd put it out here and see if y'all have
> any
> >> ideas and suggestions.
> >>
> >> Begin Quote:
> >> Would love any ideas you can give me on the issue I'm having on my
> >> car('98 Chevy Camaro 3.8 V6). It is misfiring on acceleration, and
> fairly
> >> badly. The injectors have been replaced, the spark plugs and wires have
> >> been replaced, the heads were recently reworked with a valve grind, all
> new
> >> engine gaskets, and the Idle Air Control Valve(IACV) was recently
> replaced
> >> as well. It idles well, but misfires as soon as a load is placed on the
> >> engine, any load at all. The less the acceleration, the less the
> misfire,
> >> and vice versa. It is very bad when accelerating in a high gear at low
> >> engine rpm. The shop diagnosed misfires on multiple cylinders, and
> >> recommended I change the injectors and plugs, which I did, and of
> course it
> >> didn't solve it. I will talk with the shop tomorrow, that's another
> issue.
> >>
> >> Ran a compression check today on all cylinders, the numbers were quite
> >> good, all in the 180-205 psi range, and the minimum for this engine is
> 100
> >> psi. Suspected the Catalytic Converter of a possible blockage, so I
> >> removed the exhaust pipes at the manifolds and test drove, still
> misfiring
> >> as usual.
> >>
> >> Would love any ideas you have, sir! Thank you.
> >> End quote.
> >>
> >> He is a Navy veteran, so I'd appreciate any ideas to help him. Thanks.
> >>
> >> ______________________________**_________
> >> http://www.okiebenz.com
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> >>
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> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com>
> >>
> >
> >
> > ______________________________**_________
> > http://www.okiebenz.com
> > For new and used parts go to www.okiebenz.com
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> http://www.okiebenz.com/archive/>
> >
> > To Unsubscribe or change delivery options go to:
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> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com>
> >
>
>
>
> --
> OK Don
> 2001 ML320
> 1992 300D 2.5T
> 1990 300D 2.5T
> 1997 Plymouth Grand Voyager
> _______________________________________
> http://www.okiebenz.com
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>
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>
_______________________________________
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