RE: 01 Protege misfiring

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RE: 01 Protege misfiring - 4/15/2008 2:17:30 AM    Nick323protege   Posts: 4 Joined: 4/15/2008 Status: offline My 323 had this misfiring problems too... But i've solved it.I did re-timing,changed suitable spark plugs,cleaned throttle body,air cleaner replaced,most importantly FUEL FILTER,changed engine oil... Now my car runs like new... (in reply to wsoape281) Post #: 11

RE: 01 Protege misfiring - 4/15/2008 7:14:18 PM    sugarbnr   Posts: 2 Joined: 4/15/2008 Status: offline Okay I might be a little Biased.. as a Mazda Tech, I totally agree with your mazda dealer.. Change the coils. (in reply to sandeeeg) Post #: 12

RE: 01 Protege misfiring - 4/16/2008 8:33:05 PM    sandeeeg   Posts: 15 Joined: 7/16/2007 Status: offline alrighty, I changed the coils today.  Drove fine for about 15 miles and now my CEL is on again. GRRRRRRR. (in reply to sugarbnr) Post #: 13

RE: 01 Protege misfiring - 4/18/2008 10:21:01 PM    protegedon   Posts: 100 Joined: 9/30/2007 Status: offline What about the plug wires, plug caps or springs? Is the code the same as before? (in reply to sandeeeg) Post #: 14

RE: 01 Protege misfiring - 4/21/2008 4:58:37 AM    sandeeeg   Posts: 15 Joined: 7/16/2007 Status: offline yes, the code is the same.  It started with 300 now the code is 421.  I've changed the plugs, wires, o2 sensor, coil packs. (in reply to protegedon) Post #: 15

RE: 01 Protege misfiring - 4/26/2008 8:19:00 AM    protegedon   Posts: 100 Joined: 9/30/2007 Status: offline It could be your PCM (Powertrain Control Module), you know, the computer. Take it to the dealer. < Message edited by protegedon -- 4/26/2008 8:22:31 AM > (in reply to david76r) Post #: 16

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