Mazda Repair Questions? Ask Mechanics for Answers ASAP
When you turn the key to the run position can you hear the fuel pump buzz for a few seconds?
Sometimes you need a helper to either listen or turn the key for you.
Have you attempted to start it with supplemental fuel? Try spraying fuel (or starting fluid, WD40-anything flammable really) in the intake duct and then crank it and see if it will run.
Ok. So we have a spark issue. Do you have a scan tool to check for cranking RPM?
Is it the 4 cylinder or 6?
So it showed no cranking RPM or the scan tool wasn't able to show it?
Does it seem to communicate normally with the PCM?
When cranking does it sound like there is any unusual engine noise?
Watch the check engine light while you crank the engine over. If the check engine light stays on while you are cranking, this usually indicates you are not receiving a good crankshaft position signal. Access the crankshaft position sensor and unplug it. Now, put your volt meter across the pins of the sensor, set your volt meter to read AC voltage. Then, crank the engine. A good crankshaft position sensor should be able to put out .5 AC volts or more while the engine is cranking. If there is no output, check the tone ring before replacing the sensor. If the output at the sensor is ok, suspect damaged wiring between the sensor and the PCM.
When you replaced the valve cover gasket nothing looked unusual in there right? Like a timing issue? If your valve cover doesn't have a baffle on the oil fill can you see the cam rotating as you crank?
This problem is a little odd. It doesn't have the normal symptoms of a 2.3l mazda motor.
At this point I think you'll need to check for output at the crank sensor.
Please let me know if you need any additional info or if you make and progress on checking the crank sensor output.
I wanted to see if you need any more help with this one.
Please let me know if you do.
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