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Increased Performance - Holy Crap!

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2006 S Platinum with 110,000 miles. Bought the Duratec software and cable.


Had a fault on #5 coil back in April, and replaced it.  Ran well again for several months, until #8 and #4 showed intermittent issues.  Bought 7 more coils and all new plugs, and replaced them all.  Wow!!!  I thought the throttle response was good before, now she seems to be pulling extremely hard at the reins.  What fun to drive, and no idea new plugs and coils could make such a difference.  You always hear that plugs, with unleaded gas, will last forever.....case and point, my 2000 Silverado 5.3 at 266k still getting 17mpg and strong with original plugs and wires.


I must also offer a heartfelt thank you to those of you who buy new, and give many of us a chance to enjoy these "broken in" machines within our means.  Thought I could catch up some day and order my own, but nay, the new prices continue to run beyond me.  It is indeed a privilege to take over their care where you have moved up.  


And thank you, Loren, for putting up with us.



Edited by Capt.Evan
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  • 4 weeks later...

Not once have I ever heard that spark plugs will last forever with unleaded gas. And according to GM you should have changed the plugs at least 3 times by now, closer to 5 based on how many I've replaced. Seen them completely worn out at 30k and I've installed well over 1000 ACDelco plugs and wires. 

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