[Aries256]

Looks like Mazda has a history of using Mitsubishi Electric Company electronics, as that ECM board shows. I noticed the headlight set, the key fob, and a few parts on the engine of my car were Mitsubishi Electric. I didn’t even think they made car parts outside of Mitsubishis.

 

[Cussboy]

Looks like Mazda has a history of using Mitsubishi Electric Company electronics, as that ECM board shows. I noticed the headlight set, the key fob, and a few parts on the engine of my car were Mitsubishi Electric.

What about starter, alternator......

 

[Aries256]

What about starter, alternator......

No clue on those, when I’m checking my oil I’ll see if I can see a label or something on the alternator, and starter. I’m still figuring out what is what on this engine besides the common stuff. Never had a DI engine, nor anything this advanced before.

 

[Axel Breaker Earl]

Never had a DI engine, nor anything this advanced before.

DI engine?

You must have a newer Mazda......these trucks (B-Series Forum) never had Direct Injection. Fuel Injection, yes.......but only into the intake manifold.

 

[Aries256]

DI engine?

You must have a newer Mazda......these trucks (B-Series Forum) never had Direct Injection. Fuel Injection, yes.......but only into the intake manifold.

Ooops distracted posting at work >_< lol yeah I have a 22 Mazda 3 😅

 

[fixitrme]

UPDATE>>>>>>>>>> Today, I went ahead and replaced the water thermo sensor.. Having the engine already "warmed up" couldn't really tell much other than the fact that the idle is somewhat irratic. It doesn't really stay at one speed and tends to go way up and then down. I'll know more later or tomorrow when I really try a cold start! If this doesn't work, I'm afraid my next step is to replace the gas pump and sending unit. It'll cost about $180 but I just don't have the time, the place nor patience to test things. Really getting tired of this stuff!!!!!!!

 

[C J]

UPDATE>>>>>>>>>> Today, I went ahead and replaced the water thermo sensor.. Having the engine already "warmed up" couldn't really tell much other than the fact that the idle is somewhat irratic. It doesn't really stay at one speed and tends to go way up and then down. I'll know more later or tomorrow when I really try a cold start! If this doesn't work, I'm afraid my next step is to replace the gas pump and sending unit. It'll cost about $180 but I just don't have the time, the place nor patience to test things. Really getting tired of this stuff!!!!!!!

Sounds like at this point you are just throwing parts at it. Have you considered bringing it to a certified Mazda tech?