The mysterious coffee can, finally revealed. Like most, this one has rusted along the rear seam until the constant flexing due to pressure changes cracked the rear cap, allowing dirt inside, and an unrepairable vacuum leak. The fix is to swap in the newer plastic reservoir.

Before madly ripping out all the emissions systems on your vehicle, read this article to learn how each one benefits the engine.

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Owner caption July 2012 · Photo 4578 of 5000