Changed spark plugs on 4 cyl engine. Started it up and it knocked pretty bad. Did have oil in the plug wells but cleaned out best I could. Turned engine off and restarted, same knock. Checked #3 plug to make sure right size, it was. Now starter spins but enine wont start.
Its possible you got enough oil in one cylinder to make the engine hydro-lock. That is a condition where something liquid is in the cylinder and will not allow the piston to travel from top to bottom.
You may have broke the timing belt.
SOURCE: 2001 MPV Runs Rough at Idle and Low end Throttle
This could be a bad fuel injector. Lean implies low fuel to the cylinder which will cause a misfire.
SOURCE: 2001 MPV Runing Rough at Idle & low end Throttle
the lean condition is the big clue here it indicates a lack of fuel which is causing the mis-fire on #3. I would suspect a fuel injector is clogged or not getting a pulse from the PCM. ( pulse is the electronic signal)
SOURCE: 1999 Mazda Millenia Check Engine light
it picks up nois inside of the motor it is located in the side of the block under the intake sometimes right above the starter
SOURCE: spark plug firing order
check the ignition coil power source...get a test light & check for power with the key on @ the positive side of the coil...if it does have power have a friend crank the engine over & check the negative side for a flashing light..if it does then make sure you have spark @ the coil if not replace the coil
SOURCE: 94 mazda 2.0 engine 626 won't start.
Have you checked the fuel pressure? It sounds like a bad fuel pump.
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