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Old 04-25-2012, 12:44 AM   #15
Scooby Specialist
Member#: 203438
Join Date: Feb 2009
Chapter/Region: MWSOC
Location: St. Louis, MO
2002 WRX


Was the weather different when it was tuned vs. when it started sputtering? Possibly just a tad different, like 10-20*F cooler outside?

What are your plugs gapped at? Its very possible the gap is too large, causing misfiring under boost. I had this happen after going from a vf34 to a 16g.

There really is no "proper gapping," that can be assumed for all cars; it depends on one's setup.
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Last edited by mowgli29; 04-25-2012 at 12:51 AM.
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