[hijack]

Quote
Also, if you have an exhaust leak BEFORE the O2 sensor it can really screw up the way it runs. The sensor sees the extra oxygen and fattens up the system even though it isn't needed.


My turbo seems to be running rich. Sooty exhaust pipe and rotten MPG. The turbo motor has a secondary air system that lets air into the exhaust at the downpipe, right where the O2 sensor is. Something to do with more air for catalysis when the engine is cold. Mine definitely has a leak right where the the feed pipe goes into the downpipe, which is again where the O2 is. Could this likely be causing similar to happen to me? TIA

[/hijack]

Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand!
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