Re: Ping at WOT and high RPM

From: M.B. (
Date: Wed Sep 05 2012 - 06:08:10 EDT

Well, I re-routed #5 and #7 spark plugs at the suggestion of someone on
the MML and went to a colder plug and that reduced it to a couple light
pings just before it shifts out of 1st at around 5200rpm.

The O2 sensor is on my list of things to replace, I have one sitting in
a box, but it looks like a PITA to do so I think I might make some poor
schlub at a shop do it. ;)

The plugs were pretty dang white when I pulled them:

I went from NGK FR4 to NGK zfr6f-11. You'd think two ranges colder
would be excessive but this is what's recommended for 97+ 5.2L and 5.9L
Ram/Dakotas from what says.

We'll see, I have a spare intake manifold in my closet with the pan
replaced with Hughes-style aluminum plate if it comes down to it.



On 09/04/2012 09:35 AM, Michael Maskalans wrote:
> On 1-Sep, 2012, at 19:51 , M.B. wrote:
>> I've been having issues with a ping at high RPMs (over 4k) on my '95 318 Dak, generally only at wide throttle openings.
> If it's not the belly pan, it could potentially be a forward O2 sensor going bad (but not out of spec) and the ECM leaning it out? Just a thought.
> --
> Michael Maskalans
> Rochester NY

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