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#4129196 - 12/01/21 01:39 PM Re: 2004 engine is pinging- Anyone else ever see this? [Re: 732t37]
RF_Overlord Offline

Poobah

Registered: 12/14/02
Posts: 7848
Loc: MA
@ 2011LX...I thought '03+ cars had a knock sensor and *shouldn't* ping (under normal conditions)?
_________________________
'03 Mercury Marauder (The Blackbird)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen

'04 Grand Marquis LS Limited Edition (Spruce Green)
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'00 Grand Marquis GS (Silver)
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#4129206 - 12/01/21 03:28 PM Re: 2004 engine is pinging- Anyone else ever see this? [Re: 732t37]
2011LX Offline
Over the Hill

Registered: 08/31/13
Posts: 1460
Loc: SE WI
The knock sensor is a failsafe, not a prevention. Using the knock sensor, the PCM is reactionary in pulling timing. It's not programmed to pull timing before knocking, only after detection. That's why this classic story of knocking only on throttle tip-in is so common.

And speaking of these engines being prone to knock and the knock sensor not being being introduced later, I'm sure a lot of the people who owned the 1991-2002 engines remember hearing spark knock well.
_________________________
2011 Crown Victoria LX - purchased @ 37k miles
currently @ 100k miles
Dark Toreador Red Metallic exterior
Medium Light Stone interior

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#4129330 - 12/03/21 05:37 AM Re: 2004 engine is pinging- Anyone else ever see this? [Re: 732t37]
Marauder2004 Offline

Rookie

Registered: 04/01/06
Posts: 61
Loc: VA
Not a solution but my old 2004 started pinging under light load about the time it reached 300k. Nothing I ran through it would change that so I just ran 93 in it until I sold it last year at >340k.
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06 MGM LS Ultimate w/ HPP, Black/Dark Charcoal
69 Marquis convertible, 429
48 Ford F4


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