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Discussion Starter #1 (Edited)
a spark plug change? My '06 had copper core plugs and they were completely worn out. Just changed them to Champion Platinum and the first time I checked the MPG it was 14.

I have read that the ECM (I believe) needs to re-learn to run with the new gapped plugs. What do you guys think? And how do you know if you have successfully reset the computer.
 

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It will absolutely help, it's used to running with the large gap. Disconnect the battery, neg first. Then you'll have to drain any stored power left over. Press the brakes, hit the horn, turn the lights on, anything should work. Then leave it disconnected for a half hour, (debatable if it's necessary, but it can't hurt).

Reconnect & you're reset.
 

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Discussion Starter #3
I used this method from another site. How can you tell if it reset?

"Disconnect the positive battery cable from the battery,
ground the cable end for 30 seconds,
reconnect,
turn key to ON position,
wait for fuel pump to stop pumping,
start truck.

This is the ONLY way to completely clear the ECU. Any other way does not discharge the capacitors in it. Dealers do it this way, at least the Techs that know about it. They won't tell you though, I will and did, as I am no longer a Tech."
 
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