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Mazda 323

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Comments

  • You had a spark at the spark plug? How can this be a no spark issue? If you are getting a consistent spark firing while cranking at that plug, you DO NOT HAVE a spark issue. I would check the fuel pump system next.

    Not necessarily. The sound he is referring to is pistons hitting valves. If engine damage has happened, you may not hear it any more. Hopefully the timing is not an issue. If it is, hopefully just jumped a tooth or so. Not enough to start, but not enough to do major engine damage. This is the last thing to look at.

    Do this next......Verify consistent spark at plug. If it is there, then check the fuel pump. If it is original, it is a very good candidate for a problem.
  • 93_32393_323 Posts: 6
    ok thanks so much. I'll check the spark plugs again first thing in AM. What are your thoughts about the ECU being the cause?
  • If you have that spark, you can forget the ECU from that aspect. When I began learning electronics on old tube technology, repair diagrams used "block diagrams. That helped to see where signal began and was amplified to each stage. So if you have any electronics experience like in the old stereo equipment, it will help a lot here. So in the 89 Mazda here and in your 93 similar design the "tuner" would be the pickup coil in the distributor. If it is not timed correctly, then "you are not on the station and you get a lot of static!" The signal leaves the distributor and goes to the ECU which is the "amplifier" and basically that is exactly what it is! Now some cars and maybe this one as well may have an intermediate final drive chip, "power amp". Our 89 here does not. The coil, "speaker coil" does its thing. The spark plugs are the "speaker diaphragm." So instead of sound, you are looking for spark. If you have spark you can forget the ECU.....but being an old car nut, it never hurts to have another one. Which reminds me, I may need to move the one on the self into service before it goes bad on the self. Another thing I got told while learning electronics was to quit chasing my tail or chasing ghosts. AKA know as wasting time once I had confirmed something worked. Confirm your spark then move onto fuel question.

    Next time you go to crank the car, remove whatever needed to get to fuel pump. If a sedan, most likely rear seat. Have some one turn the key on while your ear is very close to fuel tank. Listen for the pump to pressurize. If you can not hear it....hello you may very well have your problem! Hopefully the "mechanic" set your timing back. Not likely since he did not get it running. Oh, well, one step at a time. Some of us old timers scribe line up marks on distributor cars to avoid that fun.
  • 93_32393_323 Posts: 6
    I'm in the process of having the car towed back from the mechanic's shop. I asked him if he tested the plugs and his reply was

    "The spark isn't getting created to get to the plugs. Besides the wiring and the ECU, we've replaced everything that controls/creates spark" Your Thoughts...

    He continues with telling me where to find an ECU. I told him to recheck the plugs. Though I've checked him out on a local ratings website, I'm begining to think he wrote his own reviews.
  • 93_32393_323 Posts: 6

    _Well, Girlcarbuilder, I'm bout ready to throw in the towel. I've replaced the ECU, still no start; tried a new Fuse for Fuel pump/injector, still no start; Fuel pump can be heard humming sound, per my son and we've rechecked the spark plugs...spark. Battery fine. Not sure what else I could check as to why it's Turns but doesn't start. Any more thoughts?

  • PF_FlyerPF_Flyer Pennsylvania Furnace, PAPosts: 5,854

    @93_323 said: _Well, Girlcarbuilder, I'm bout ready to throw in the towel. I've replaced the ECU, still no start; tried a new Fuse for Fuel pump/injector, still no start; Fuel pump can be heard humming sound, per my son and we've rechecked the spark plugs...spark. Battery fine. Not sure what else I could check as to why it's Turns but doesn't start. Any more thoughts?

    Fuel pump running, engine turns, spark is fine. Maybe some kind of fuel blockage in the line? I know it sounds too simple, but you're running out of things it could be.

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  • 93_32393_323 Posts: 6

    how does one check for a fuel blockage?

  • PF_FlyerPF_Flyer Pennsylvania Furnace, PAPosts: 5,854

    I'd want a manual in my hands to be sure of what I was looking at (either the Mazda service manual or Chilton or Haynes

    The basic concept (at least how I did it with my truck) is that turning the key to the On position will start the fuel pump. With the fuel line disconnected at the tank, if fuel comes out, then the pump is functioning. Then reconnect that end of the line and disconnect at the engine and turn the pump on again. If the line is blocked/kinked/filter clogged, you'd get no fuel or noticeably less fuel coming out.

    Again, I'd definitely want a manual/diagrams at my disposal.

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