Question about 2004 Mazda Tribute

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HI I HAVE A 2001 MAZDA TRIBUTE AND THE CODES PO301 AND PO303 CAME UP IN THE DIAGNOSTIC REPORT. THE CAR TURNS OFF WHEN I WARM IT UP IN THE MORNING IN THE COLD AND AFTER THAT ITS FINE I ALREADY CHANGED THE SPARK PLUGS WHAT ELSE CAN I DO OR NEED TO CHANGE?

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Cylinder 1 misfire and low compression. Plugs and wires changed plus new fuel injectors. The engines still misses and no one can find the cause. When put on the computer it read misfire cylinder 1.

Posted on Aug 25, 2011

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If this is the six cylinder, you do not have plug wires. so changing them is not possible. had an intermittent cylinder 1 misfire, ended up being a broken wire at the ECM (located at the back of the engine compartment right below the wipers). Before replacing coils, move them to other cylinders and see if the problem follows, if not, then something is wrong with that specific cylinder, if it follows the coil, then obviously it is a bad coil.

Posted on Apr 16, 2009

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PO301 AND PO303 are codes for misfire detection in 1and 3 cyclinder. It might be worn/damged distributor cap or wiring problem, so might be needed to change wiring set.
Let me know how it will go
Good Luck

Posted on Dec 31, 2008

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P0301 and P0303 indicate a misfire on a particular cylinder. P0300 = General misfire, no specific cylinder. P0301 = Misfire on cylinder #1, P0302 = Misfire on cylinder #2 and so on. If you have already replaced the plugs, perhaps the plug wires need to be changed.

Posted on Dec 31, 2008

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Does that answer your question?

You did not diagnose your problem, which
was a misfire.

Do you have codes PO301 thru PO306?

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Have to know the system your working on

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