12/19/2023 0 Comments Fuel filter 03 mazda protege![]() ![]() my problem used to be every couple weeks to months always at about 60 km/h it would lose power almost stall, the engine light would flash for a couple seconds it would suck a bit of gas, then it would go solid and run fine and the engine light would clear itself. It has been into multiple mazda and private shops plus I have worked on it myself. I have replaced the spark plugs, wires, 02 sensors x2, the ERG kit, catylictic converter, coil packs have been tested, ran many bottles of fuel injecotor cleaner though it. I have hadthese two codes on my 2002 mp5 since oct 2009 As long as I keep it over 70MPH or under 65MPH its fine. At 70MPH it kicks down no power with a few kicks of the gas pedal it kicks back in. After i replaced the pre-cat it ran fine for about 3 days then started to act up again. HHHHEEEELLLLPPPP!!!!!! I'm frigin losing my mind. Have spent endless amount of money to try and fix problem. Replaced Pre-cat(the one that bolts directly to the exhaust manifold. Trouble codes 1) P0421 - Warm up catalyst below threshold(bank 1) 2) P0300 - random/multiple cylinder misfire detected. ![]() HELP! I posted once before and have done everything I can think of nobody can seem to help me with problem. ![]()
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