I have a 2013 Mazda 3 Neo that has a weird problem where it sometimes has a weak start or refuses to turn over. It can either be on a cold or warm start. It might behave like this for a few days and then goes back to normal as if nothing happened. As far as symptoms go, the issue seems to related specifically to starting as the car is completely normal while driving. I've had it a few times where the engine weakly turns over but then stalls almost immediately after.
It only does this sometimes which is odd.
I've gotten an OBD2 sensor that catches all the data while the car is on. I can rule out the MAF sensor as that correlates roughly to what my RPM's are. I'm leaning more towards the starter though I can't rule out the spark plugs, pump and injectors completely. The only real odd piece of information I have noticed from the sensors is that sometimes I have a misfire in Cylinder 2 sometimes while trying to turn over on a cold start, though on one occasion I had it misfire in number 2 during startup but the rest misfired at some point during the drive
Do you know what might be causing this?
Well I would concentrate on cylinder number two then so swap your ignition coil for number two to say number four then if you get the code for number four you know it's a bad ignition coil. Been a professional mechanic I have $6,000 scan tools that can activate and check that stuff you're not going to have that so let's say if it was a fuel injector on number two then you'd have to go through the hassle of moving number two injector putting in a number for putting four on two and then testing and seeing if this move then where I can just electronically disable them and test them with the machine without having to take all that crap apart that's one reason mechanics get paid so much money these days cars are getting so complex and sometimes fixing them yourself if it is the injector could result in a ton more work
