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Performance Upgrades - Maintenance - Modifications - Problem Solving - Off-Road - Street Trucks. Covering the Explorer, ST, Sport, Lincoln Aviator, Sport Trac, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Aerostar. Featuring H.I. - Human Intelligence.
Have cleaned (4 times) MAF and replaced it. Engine still rough with engine light on and P1131 code. Points to 02 sensor. How do I tell which one? Where is it? I found one on left side. Can't find one on right side. I was told that there are 2 above the cat converter and 2 below - right...