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Old 10-10-2013, 05:16 PM   #2
Derf00
6th Gear Member
 
Join Date: Feb 2005
Vehicle: '08 S197 GT
Location: AZ
Posts: 9,563
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Rather than rely on the light, hook up a handheld OBDII scanner that has a datalogger or live view. It will be obvious which cylinder is having the misfire then or what is causing it.
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08 S197 GT Auto: FRPP Strut Tower Brace, FRPP Bullitt CAI, Bama 91-P Tune
Pending upgrades: Shaftmasters Aluminum 3.5" DS, FRPP 3.73 gears, Axle back exahust (?)

Quote:
Originally Posted by LostBoyz View Post
if you are getting 29mpg in your 5.0, you aren't driving it correctly
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