Dave, what is a MXZ?
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Steven St.Laurent
C4i System Engineer
C4i Engineering Branch, PSD, MCTSSA
MARCORSYSCOM, U.S. Marine Corps
Office (760) 725-2506 (DSN Prefix: 365)
"Never be content with somebody else definition
of you. Instead, define yourself by your own beliefs,
your own truths, your own understanding of who
you are. Never be content until you are happy with
the unique person GOD has created you to be."
-----Original Message-----
From: Dave & Charlene [mailto:DOHCTurboIII@Sympatico.ca]
Sent: Friday, May 31, 2002 6:44 PM
To: dakota-truck@dakota-truck.net
Subject: Re: DML: pinging on 4.7
> >I'm really curious about this pinging in 4.7s. I see a lot of posts
about
> >this with colder plugs, higher octane and 180 thermostats as the
solution.
> >
> >My 4.7L '00 Grand Cherokee 4x4 has 24,000 miles, original plugs and
> >thermostat and a steady diet of 87 octane. No pinging whatsoever!?
It's
> >run a best of 15.58 in the 1/4 with 15.80s common place in hot weather.
>
> Do you have any slow cars or drivers in your family :-P
>
> >Is this pinging issue only with newer 4.7s? Anyone have a theory why so
> >many people have this problem and my '00 doesn't? Is it just a Dakota
> >problem? If DC got mine right, why didn't they get all of them right?
> >(oh yeah, I forgot, if it ain't broke, pay an engineer to fix it!) :-)
>
> There have been a lot of posts in the past about pinging on the magnums
> 3.9/5.2/5.9. A major reason for the problem was the barrel intake and
> a belly pan gasket prone to leaking.
>
> I've only recently become aware of some pinging complaints on the 4.7 .
There is a flash update for all 4.7s, Grand Cherokee, Daks, etc, that fixes
the ping. There have been so many flash updates for these things, I have
lost track. Be warned though, there is a noticeable drop in power after this
is done.This also applies to the V6/V8 mags, there is a flash out for them
to, and it also drops power a bit. And yeah alot have bad intakes, which
make it worse.
Dave St.Louis
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98 GRAND CHEROKEE LTD. 5.9L
89 LEBARON GTC Conv. Intercooled 2.5 {14.13@95}
89 SPIRIT ES
2000 MXZ 700
1999 MXZ 440
Pics at : http://www.community.webshots.com/user/davestlouis
*~*MOPAR OR NO CAR !!*~*
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