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Old 09-27-2003, 08:10 PM
manny manny is offline
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Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160
Okay, in the right order:

Testing @ 2500 rpm-no load, as compared to a dyno run, would result in a lower exhaust temperature.
Age & mileage will have a deteriorating effect on the converter.
Exhaust leaks would scew the readings ( diluted ), probably in your favour.
A large leak would be noticed by the analyzer & the operator.
In summation, a " lazy " Oxygen sensor could possibly be the main culprit of your problem.
Do you have the means to check the livelyness ( cross-counts, rich-lean swings ) of your sensor ?
If not,can you have someone do it for you ?
2007 C 230 Sport.
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