Help with rfi misfire?

[DustinDriver]

2008 speed 3. Bnr s3, jbr 3.5" intake, hks bov, front mount intercooler, auto tech hpfp internals, ngk 3787 plugs, brand new itfp. Hpfp pressure dropping at wot only 1 cell. Being tuned by Justin at freektune he suggested new plugs. Didn't help. I replaced itfp and filter, didn't help. Hpfp has been cleaned ,spill valve included. Would ferrite beads help? What's next? Coil packs? No cel

 

[DustinDriver]

Also replaced prv.

 

[Raider]

OK so there is radio frequency interference? Weird. Mazdaspeeds usually have a random misfire. Total pain.

I don't think you got the right plugs. I have used these https://edgeautosport.com/ngk-iridium-ix-spark-plug-set-of-4

Note that for plugs, sensors, coilpacks, no Amazon.

Coilpacks must be oem. Sensors especially. Because you won't fix the problem.

Upload logs.

 

[DustinDriver]

That's the plugs I had in it. Justin told me to get these ngk3787. What should be my next move? Justin is calling it rfi. All.i see is a 1 cell dip in hpfp pressure. This happend a year ago. I replaced my dirty itfp sock and it fixed it.

 

[Easter Bunny]

Check all of the electrical connectors on the hpfp look for wires that are damaged or pulling out of the connectors. Connectors not seating correctly etc

 

[DustinDriver]

That was the first thing I did was check anything obvious. Hofp ground looks good . All connectors look fine.

 

[Easter Bunny]

Unplug each one and inspect both ends thoroughly inside and out

 

[DustinDriver]

ill check them out.. i didnt see anything thus far... has anyone seen this before.. ive read everything i can find and i dont see anything about 1 cell dips....

 

[DustinDriver]

All connectors and pins seem to be fine.

 

[DustinDriver]

If it was a leaking injector, would it show on stft?

 

[DustinDriver]

Ok soo... I put a ferrite choke on my fuel pressure sensor harness, stretched my coil pack springs, new negative battery terminal and recapped ngk 3787 plugs to .027 per justin.. running ok now.

 

[Raider]

Awesome! Keep a build thread going of your success.

 

[DustinDriver]

First e85 tune complete and datalogs sent. I'd have to say I was not too impressed with the bnr s3 , 93 tune. I think my k04 on e85 was quicker. It Def made more torque.

 

[DustinDriver]

thanks for all the help and suggestions so far.. i like this platform but darn its a little tempermental.. lol came from srt4 and honda platform.

 

[Raider]

A CorkSport CST4/5 would be awesome.

 

[DustinDriver]

i read and read and kept coming across people saying the CS turbos were re stamped chinese turbos .and dont plan on anything other than maybe methanol one day... so i figured the BNR S3 would be plenty just to max out my stock fueling capablilties.

 

[Easter Bunny]

Who is tuning you? The ko4 does make a ton of torque by that's about all it does

 

[Raider]

i read and read and kept coming across people saying the CS turbos were re stamped chinese turbos .and dont plan on anything other than maybe methanol one day... so i figured the BNR S3 would be plenty just to max out my stock fueling capablilties.

I have 70k on mine. They have sold thousands and no problems. People like to talk trash. Sucks.

 

[DustinDriver]

Justin at Freaktune.

 

[DustinDriver]

Justin also is who suggested the BNR. Super easy guy to work with. Just wish it didn't take a week in between revisions. Lol