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712 Posts
Put your PCV system back on ASAP. You are allowing blowby and crankcase gasses to accumulate inside the engine. These gasses turn into acid and will eat your pistons, bearings, block, head, and anything else they come in contact with. Also, your oil will turn to sludge very quickly. You are severely shortening the life of your engine by doing that. The OBD-II electronics are calibrated to have all of the emissions systems operational. Removal of any of them offsets that balance and can cause issues like poor idle, a lack of power, poor fuel economy, and in a worse-case scenario, killing the engine. Sludge accumulation often contributes to dropped valve seats.
