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Posted on May 14, 2009
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Hi I just rebuilt my 1998 4.6 engine ,started it up this morning,seems to be working fine except she pings a little on hills ,is there any way to adjust timing or reprograming computer or something.thanks kevin

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  • Posted on May 14, 2009
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It sounds like a little bit of pre-detonantion,You can try running a higher octane fuel or a cooler spark plug.

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Pre-ignition

Remove the black octane shorting (one time timing ****** adjustment) bar located near the ignition module ( the connector the bar goes into looks like a fuel injector connector), this should stop the ping, make sure the right jumper is removed, if you pull the wrong one the truck will lack power, if you get the right one the ping will stop and you will feel no change, U may loose a little MPG. If you can't locate it the dealer will do it for little or no charge, just tell them you want the octane adjust short5ing bar removed, did many of them on trucks like yours, the 2300 has a pinging issue, they all do, Mazda and the Ford Ranger.
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