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