Really bad MPG since winter hit??

[TiAgX5]

Originally Posted by Moezer

In the summer I put in a cold air intake, its still on the x5, should I put the stock intake back in to it?

Could it be that the intake is sucking way too much cold air and causing the engine to run richer then it should that makes it drink gas like its nothing?

thanks for any help

The cold air intake will not cause a rich condition. The O2 sensors measure the exhaust gas and cause the ECM to adjust the fuel injector pulse width to deliver the correct air/fuel ratio (cold air will cause a wider pulse and deliver more fuel, and make more power).

Even with a carb'ed motor, cold air causes a LEAN condition if jetting was set for hot weather.