S2000 Under The Hood S2000 Technical and Mechanical discussions.

signs of running lean?

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Old 01-17-2008, 12:13 PM
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anybody else have any ideas? a little desperate here, wanna make sure before I blow in a hole in my pistons.
Old 01-17-2008, 01:10 PM
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put it on a dyno
Old 01-17-2008, 02:49 PM
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Originally Posted by qbmurderer13,Jan 17 2008, 01:13 PM
anybody else have any ideas? a little desperate here, wanna make sure before I blow in a hole in my pistons.
PULL THE FARKING PLUGS.
Old 01-17-2008, 03:25 PM
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Put a wideband meter on it and check it under full load from 5000 to 8500 rpm. If you measured a less than full throttle the mixtures will be leaner than full throttle.
Old 01-17-2008, 03:46 PM
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and what am I looking for on the farking plugs? I just installed new ones last week and threw out the old ones. and is installing a wideband is the only way to tell if I'm running lean?
Old 01-17-2008, 04:05 PM
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wide band or go to another dyno. this reading is way to wrong
Old 01-17-2008, 04:17 PM
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you could have the dyno shop to pull the primary 02 and measure the a/f at that point to get a true a/f. the primary does not control the a/f for WOT (open loop) conditions so the performance won't change. it only control the a/f in close loop conditions.

some shops will add a 02 bung in the header for a/f readings, but that's hard core...
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