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      04-29-2009, 03:27 PM   #55
Serjames's Avatar
Drives: E93 335i M-sport
Join Date: May 2007
Location: Surrey - UK

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There are two sets of cats on these cars. The Mods tony (and others ) Have done only remove the front set.

We've then re-located the Lambda sensors behind the seconday cats, so the computer see Catalysed exhausts... nifty really

There seem to be definite differences between how the lambdas work on the US models versus the Uk ones we've played with. For instance the "lambda sims" that the US guys use and wire into the ECU to trick the lambda sensors DO NOT seem to work on our cars, both mine and Tony's still caused limps, hence why we re-routed the sensors themselves.

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