This is a common issue we see these days with OBDII cars and aftermarket exhaust systems. Some systems are very finicky about properly sensing the airflow going through the exhaust system, that if they sense too much air at the downstream oxygen sensor, it will trigger a check engine light. This can be caused with a larger diameter exhaust, high flow catalytic converter, or a catalytic converter delete exhaust. This miata came in due to this issue after the owner …

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This poor little thing was towed in with an EML light and check engine light on. The EML light typically relates directly to the throttle body being bad (internal TPS sensors on this model), and the CEL revealed a list of about 9 codes ranging from secondary air injection problems to MAF sensors to cam sensors to O2 sensors. Yuck. But, to get it back on the road, the EML was the main issue, so I ordered in the new …

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Helped a freind out with an emergency on Friday afternoon. Turns out his boxster started smoking excessively out the tailpipe. On most cars you would fear the worst that maybe a headgasket was blown, but the M96 engines use an oil air seperator that can go bad and allow oil vapor back into the intake stream, where it is burned off in the cylinders and causes the smoke. Pearing up over the passenger axle, you can see the OAS attached …

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Had a boxster S come through today that was in need of new brake pads, and had a CEL on.  Both quick fixes, got new pads swapped in, and tried cleaning the MAF sensor first.  If it pops up again, then we will have to drop the $300 for a new sensor, but a lot of times they just get dirty and a cleaning will do.