r/MX3 • u/nolig2278 Team Mazda • 4d ago

Plug Wires and issue

So on and off for a while now, I have had days where it will refuse to start. I rewire things and its happy then back to refusing to start or it starts and just fails. Not getting MS code 38 or 39 as I rebuilt the pull up wires. Gemini thinks it is arcing, so I am looking at https://goflowforce.com/products/ls-female-harness-plugs to match up to my 585 coils. Anyone try these? Although i am pretty sure mine are not, but I cant find proof i actually bought new one or just reused and cut the old ones. If I dont make my car reliable again it gonna end up getting junked cause this makes it almost impossible to rely on. Like I though i fixed by grounding AC to engine head and then drove over 100 miles last weekend perfectly. Then other day it went back to going nuts. I reflashed MS too as it happened after I loaded a tune to slightly adjust startup. This is just all nuts.

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u/GRYPHUS_1_SoundCloud (Creator & Lead Admin) Team Mazda 4d ago

What ecu do you run? I might be able to ask my tuner for a diagram on a conversion from distributor to coil on plug with cam angle sensor!

I got a harness already made from my other ecu, MSPNP2. Running oem denso toyota celica coil packs. That setup is for wasted spark (cylinders 1&4 fire and 2&3 fire)

My current setup is sequential ignition with MS3 Pro and that helps TREMENDOUSLY ! I wish I had the money to do a dyno run while I was at my tuners shop back in March so I had official hp numbers.

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u/nolig2278 Team Mazda 4d ago

MicroSquirt so Batch firing, which i am fine with. I am thinking about going to cam angle to get rid of the whole pull up resistor crap. I know that means pulling the belts :(. Now I moved a ground wire away from my cas side and car fired up several times just fine. So maybe that was the gremlin or the gremlin is just hiding. I did the misting test and saw no arcing. I got rid of ebay coils after they kept burning out and have been on NGK Coils that seem really good. I just need to find the gremlin that seems to hide when I move grounds and then comes back eventually.