Thursday, June 20, 2013

Liar, Liar

On Monday, I mentioned the gauge on the side of the air filter box on our truck, and how the owner’s manual says to trust the gauge. 

Cummins Service-29 

The manual clearly states that you should never replace the filter - never even open the box to visually inspect the filter - until the indicator reaches the red. 

As I mentioned in my earlier post, I had reached the point at which I no longer trusted the gauge, and it turns out my fears were justified.

Here’s what the old filter looked like when I took it out:

dirty filter

It is too soon to tell how much my mileage has improved, but acceleration/responsiveness has jumped now that the engine is no longer starving for air.

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