Spark plug pic's

[Joe Scruggs]

Sort of on subject - - I drive a '99 Dodge as a company truck sometimes.
Since it was new it always had pinging - usually while at cruise in OD and
increase load.  Pinging makes me cringe and I looked into it, thinking we
needed to get it fixed.  However, I was surprised to find that the manual
specifically states that slight audible pinging is NORMAL!  I don't service
the truck personally, but I would like to see what the plugs look like.

In the early 70's, the Ford 351W's were really bad about pinging very much
like this Dodge.  It was due to the EGR - normally it was either stuck or
the vacuum hose was disconnected ;)  I don't know why Dodge considers this
normal.  I agree that any car built in the last 15 years or so, should not
have audible pinging.  Just a couple of cents . . .

Joe

----- Original Message -----
From: "Bruce" <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, October 02, 2001 11:56 AM
Subject: Re: Spark plug pic's


>
> If you can actually hear pinging, on a newer car, there is a huge problem.
> Up the octane level a few notchs, if your wanting to keep the car.
> Not all detonation, is audible.  You can run trace, and tip in detonation,
> and never know it.  Do you know what detonation detection strategy Toyo
> uses?.
> Bruce
>
>
>
> From: "Stephen Webb" <swebb at netlab.uky.edu>
> Subject: Re: Spark plug pic's
> > > What gas, and what engine are these out of?.
> > It's a 91 toyota corolla, 1.6 dohc I think.  Mostly highway driving, and
> > certainly 87 octane fuel.  I never noticed audible pinging when I drove
> > it.
> > -Steve
>
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