Ford Focus Forum, Ford Focus ST Forum - View Single Post - Replacing air box with K&N air filter. HELP
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Old 12-08-2010, 10:03 AM   #14
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What I Drive: 2004 Pitch Black ZTS 2.3 5spd.

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Posted via FF MobileCan`t see what kind of car, what SRI, or which hose you are plugging in where from here. General info - never plug a crankcase ventilation tube! Worst case, if it`s sealed REAL good is that engine seals blow out & you neeed a rebuild just to replace them...... Installed in the same order as stock, with hoses in the same relationship to filter, MAF, and throttle body as they were originally is best - other options defeat part of the emissions system, and except for some extreme race & turbo applications do NOT increase performance... Pulling the battery negative for a bit to reset the computer so it can learn the new setup quicker is recommended for any change that effects the breathing of the engine, even if a relatively minor change... Hope this helps, get back with more info/questions & the members here will try to help out....
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