Questions & Answers for: MAZDA6 lean mixture

...possibly the intake manifold gaskets. The extra air coming in fools the computer / o2 sensors to believe it has a lean mixture then it will try to compensate for the lean mixture and add more

the computer will make it a rich or lean mixture to start the engine,if it tells the computer that it is 75 degrees the computer will lean the mixture like starting a car in the winter without a choke

lean a fuel mixture is being delivered to Bank2 (bank of cylinders closest to the front of the car. This could be caused by a defective IAC valve ( Idle Air Control) but more likely is bad vacuum hose

...lean mixture bank 2. Replaced gas cap, no difference, got smoke test, no leaks. Mechanic says replace spark plugs ($400!) and vent valve solenoid. In order to replace plugs I would have to remove ...

mixture screw to lean best idle setting. First, turn in the mixture screw until the engine dies or runs worse, then back out the screw (recommend turning ¼ to ½ turn at a time). The engine should pick