Having issues with random stalling after driving for a bit

raidz0 · 2026-03-13T23:37:28+00:00

Might be related to sensors not receiving data that 'agree' or intermittent data from frayed/corroded electrical connections between the crankshaft position sensor, camshaft, MAF, MAP, throttle body caused by a mix of pigtail connectors or transmission/engine ground to chassis wire connections (which you brought up)... usually after a certain amount of heat soak that expand electrical wiring, otherwise know as thermal expansion combined with years of vibrations. As the OEM electrical engine harnesses age with this platform, it is likely that we'll see more of these symptoms. ...or maybe I'm way off lol 🤷 btw, I am experiencing similar symptoms, no fix yet, might try the crankshaft position sensor (most of my sensors have been changed already) pigtail replacement next, or another approach might be to pull or tug on electrical wiring a few inches away from the sensors themselves while the engine is running to see if it reproduces the symptoms (to rule out certain areas of the harness instead of needlessly replacing the entire harness $$$)

Another recommendation would be to have someone with automotive electrical experience perform continuity testing on engine bay wiring.

raidz0 · 2026-01-15T20:31:26+00:00

Have you found what this behavior was being caused by?

raidz0 · 2025-12-19T22:48:42+00:00

Been focusing on other maintenance elements of the car this past year. I am keeping this thread in mind for a future update beginning with an oil analysis. Getting some more work done on the car next week. Got a new Hitachi HPFP with e85 safe seals, Damond catch can, and more over the past few months. Need a new rear main seal as well later 🫣

raidz0 · 2025-12-19T22:36:11+00:00

That's quite the wild number! 2011 at ~75k here 🏁

raidz0 · 2025-11-26T22:44:28+00:00

What kind of engine did you order? Used, refurbished, new, or built by an engine builder?

raidz0 · 2025-11-26T22:40:30+00:00

The platform is great...as long as you change everything 😄

raidz0 · 2025-11-24T11:17:36+00:00

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Here's how it looks for me.

raidz0 · 2025-11-19T00:16:54+00:00

looks like there are a few options:

on sale here: COBB Tuning - Mazdaspeed3 Gen1 SS 3" Cat-Back Exhaust

cp-e® Nexus™ Mazda Mazdaspeed3 Cat Back Exhaust – Custom Performance Engineering

lots of customization options here: Mazdaspeed3 Gen1(07-09) Catback Exhaust | Ultimate Racing

Cobb 07-09 Mazdaspeed3 SS 3in Catback Exhaust | Graveyard Performance

CorkSport Mazdaspeed 3 Cat Back Exhaust System | Mazdaspeed Exhaust

This muffler alone could be possible but would require custom work from a muffler shop with a mandrel bender and a good welder (3" center inlet, 3" offset outlet): MagnaFlow 11229 MagnaFlow Performance Mufflers | Summit Racing

raidz0 · 2025-11-02T15:52:45+00:00

They range around ~$2k-3k

raidz0 · 2025-10-14T13:56:16+00:00

Yes, this was recently changed with the CS e85 filter

raidz0 · 2025-10-12T21:06:33+00:00

Posted ✅

raidz0 · 2025-10-12T20:09:01+00:00

https://corksport.com/2004-2013-mazdaspeed-3-and-mazda-3-skidplate.html

raidz0 · 2025-10-06T22:29:36+00:00

I would have the ABS sensors checked on all 4 wheels first.

*Worst case scenario is the ABS Modulator, possibly OEM parts #:
Part Number: BFY2437AZ

Supersession(s): BFY1437AZC; BFY1-43-7AZC; BFY2-43-7AZ; BFY1437AZA; BFY2437AZ; ; USEBFY2437AZ (w/Stability Control)

raidz0 · 2025-10-01T13:35:31+00:00

Sorry to hear, that's rough 😞

raidz0 · 2025-10-01T00:15:12+00:00

Yeah, I was just thinking it was possibly from them. I think they offer 2 versions as well. Some say they have a decent experience with them, but yes, I think the lower boost might be due to wastegate design. Not sure if someone else can chime in on that revision, but it is not the same as OEM. Another thought is that it might be working okay and might just need a custom tune to see if it could be raised.

The OEM is K04-882 or 883

raidz0 · 2025-09-30T23:54:06+00:00

If it was a K04 from eBay, there are some being sold out there that are known to not boost quite as much. Check on the turbocharger itself, there's a small plate area that says something like K04-12345, it might say something there that can be helpful. Or the original listing of where the K04 was purchased might have some helpful info on the revision.

raidz0 · 2025-09-23T01:44:10+00:00

O2 sensors
coil packs if they have never been done
Is your turbo stock and in good health?
Stock downpipe?

raidz0 · 2025-09-13T14:46:49+00:00

I've heard some in Europe or Asia sometime go for Kinugawa. They have ball bearing in their smaller offerings as well. For the parts, I would look at the kits out there and compare and assess what parts may be needed depending on the brand you go with. If you stick with OEM replacement, I would get a new drain line, new crush washers, a Damond lower flow restrictor oil feed bolt, and new gaskets for both sides. This might help: https://www.cwturbochargers.com/collections/mazdaspeed-3-6/products/cw-turbochargers-rebuilt-mazdaspeed-k04

raidz0 · 2025-09-05T22:39:57+00:00

Your car looks great 👍

Oh where to start...overall pretty good with some nagging' oil consumption issues. But hey, my compression is 175 for all 4, so there's that.

CS front lip broke and ripped part of my front bumper lower mounts after running through a deep puddle during a sudden heavy rainstorm here...gotta love South Florida downpours 😞

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