4.2L V6 Spark knock at upper RMP

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4.2L V6 Spark knock at upper RMP

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Ford >> Ford Trucks, Ford Vans & Ford SUV's >> Ford F-150 >> 4.2L V6 Spark knock at upper RMP

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4.2L V6 Spark knock at upper RMP - 2/29/2008 10:13:14 PM

mbtnnr

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I am running a 2007 F150 with the V6 and am experiencing engine "ping" (spark knock) at freeway speeds when slight acceleration takes place. I have tried numerous brands of gas and several octanes of each, but with no change. My local Ford dealer service dept. has changed the settings on this engine three times, but all to no avail. Some other forums I've checked seem to indicate that the 4.2L is just a "pinger" and there's little that can be done. I'm concerned about the long-term effect of this issue though. I'm getting very reasonable mileage (18-19 mpg) and have typical power for this size engine. Anyone having similar issues or know of a way to settle this down? Thanks! mbtnnr

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RE: 4.2L V6 Spark knock at upper RMP - 3/12/2008 4:43:22 AM

Use Common Sense

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Apparently it's an inherent issue with the 4.2, all though I don't have this problem with the 4.2 in my Freestar. This issue has been discussed in the Freestar forum. Take a PEEK-SEE and you might get some ideas on what to look for.

http://www.fordforum.com/m_26942/tm.htm

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2004 Freestar Limited 4.2 V6 w/Water Injection & Iridium plugs
2008 Mercury Sable 3.5 V6 w/Opened Air Box

AMSOIL Lubricants and Filters in everything

"Have a good day, and a better one tomorrow"

(in reply to mbtnnr)

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RE: 4.2L V6 Spark knock at upper RMP - 5/10/2008 9:25:54 AM

BlueOvalFitter

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RE: 4.2l ping between 3600 & 4200 rpm

Scroll down and read my reply!

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2007 F150,XL,4.2V6,auto
The anticipation of death is worse then death itself!

(in reply to mbtnnr)

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