Injector / seal failure or Miss-fire codes.. please post here

[d4m45cuz]

Originally Posted by whitefrs

Did this solve ur issue?

How did u know it was bad?

So, after 60+ miles of driving, no CEL. Seeing as I got a CEL with p0351 while leaving the dealership after my DI seal replacement (and many times subsequent), I think I can safely assume the issue has been resolved. If I had to guess, the breakdown of what causes this goes something like this:

1) Coil goes bad due to overheating (will know more once I take my old coil apart)

2) Bad coil causes overheating in the cylinder. This could be caused by a few things including misfires and/or ECU leaning the mixture in cyl #1 due to incomplete fuel burn.

3) Overheating causes premature degradation of DI seals.

I would get the p0351 codes PRIOR to the seals having gone bad and the firecrackers starting. This tells me the issue is caused by the coils having gone bad.

I have applied the JDM Transient Ignition Retard timings to my ROM via epifan's BRZedit software. Shout out to epifan for being on top of the many different ROMs out there and providing the JDM ROM to me for comparison and merging.

[DJCarbine]

Just an update, I have a direct injector seal tool coming on its way to my house. Its the same part number as posted in the previous page of the thread, I might pull my injectors just to see how well the tool works and to check my injector seals for damage

[zc06_kisstherain]

Originally Posted by DJCarbine

Just an update, I have a direct injector seal tool coming on its way to my house. Its the same part number as posted in the previous page of the thread, I might pull my injectors just to see how well the tool works and to check my injector seals for damage

Great! keep us posted!

[wootwoot]

Keep us posted. Perhaps a DIY for seal replacement? I know every owner on earth would appreciate it.

[Sportsguy83]

Originally Posted by DJCarbine

Just an update, I have a direct injector seal tool coming on its way to my house. Its the same part number as posted in the previous page of the thread, I might pull my injectors just to see how well the tool works and to check my injector seals for damage

Are you able to say where you got it and if there was a link it would be awesome.

[DJCarbine]

Originally Posted by Sportsguy83

Are you able to say where you got it and if there was a link it would be awesome.

You will have to call/email these guys the part number as the tool is not listed on their website

Part# 09260-39020-01
sales@autotoolworld.com
1-877-570-6295

[Sportsguy83]

Originally Posted by DJCarbine

You will have to call/email these guys the part number as the tool is not listed on their website

Part# 09260-39020-01
sales@autotoolworld.com
1-877-570-6295

Thanks for the help man!!

[mad_sb]

Originally Posted by d4m45cuz

So, after 60+ miles of driving, no CEL. Seeing as I got a CEL with p0351 while leaving the dealership after my DI seal replacement (and many times subsequent), I think I can safely assume the issue has been resolved. If I had to guess, the breakdown of what causes this goes something like this:

1) Coil goes bad due to overheating (will know more once I take my old coil apart)

2) Bad coil causes overheating in the cylinder. This could be caused by a few things including misfires and/or ECU leaning the mixture in cyl #1 due to incomplete fuel burn.

3) Overheating causes premature degradation of DI seals.

I would get the p0351 codes PRIOR to the seals having gone bad and the firecrackers starting. This tells me the issue is caused by the coils having gone bad.

I have applied the JDM Transient Ignition Retard timings to my ROM via epifan's BRZedit software. Shout out to epifan for being on top of the many different ROMs out there and providing the JDM ROM to me for comparison and merging.

I don't think the ecu can trim fuel per cylinder and even if it could, we only have a single up stream 02 sensor so it would not know which cylinder to trim.

If you look at the per cylinder timing compensation maps, cylinders 1 & 2 have almost 4 degrees of timing pulled out from 3600 to 4800 .7 g/rev and up and 2.5 degrees pulled from 6800 to redline.... This could cause higher EGT's on 1 & 2 i think, or pehapse it's not enough retard to increase egt's and they are limiting power on 1 & 2 due to thermal concerns??????

It is very strange that #1 coilpack seems to go bad so often and the two could certainly be linked but I don't think the coilpack issue could cause detonation, but i am assuming the mode of failure is for the plug not to fire at all or very weekly when the coil pack has issues so.... I do agree that heat could be the major cause of coil pack failure and it's possible #1 gets the least air circulation or something.

[Lonewolf]

So now the latest possible way to fix this seal crap is:

1) New coils

2) Transient retards

3) Maybe new direct injectors (or seals if they haven't gone bad)


Toyota/Subaru get your sh*t together

[rx3]

What's interesting about this issue, is the fact that many seals apparently did survive when people doubled the output by going FI (which is only possible with more pressure and with it temperature in the combustion chamber).

Maybe it's simply a manufacturing clearance/fitting issue (the tolerances given to the manufacturer(s) of the seals are not tight enough or the dimensions from seal to seal vary too much in the manufacturing process).
Some seals simply have a looser fitting and those seals are now showing problems, since they can transmit less heat and can move more easily.

[xjohnx]

Can any of you guys that have thrown the P0351 and are flashed with EcuTek check c:\Ecutek\proecu-SubaruBRZ.log (your filename may vary based on model) and do a search for P0351 to see if the code would show up when ProECU records and clears the DTCs after the flash process?

If it does, then others could check their logs to see if their cars have ever thrown it in the past (assuming they were reflashing somewhat regularly).

[Dezoris]

Originally Posted by rx3

What's interesting about this issue, is the fact that many seals apparently did survive when people doubled the output by going FI (which is only possible with more pressure and with it temperature in the combustion chamber).

Maybe it's simply a manufacturing clearance/fitting issue (the tolerances given to the manufacturer(s) of the seals are not tight enough or the dimensions from seal to seal vary too much in the manufacturing process).
Some seals simply have a looser fitting and those seals are now showing problems, since they can transmit less heat and can move more easily.

Got my first firecracker today being on FI. But I was 10k on NA before.
I am sure this just helped the failure accelerate.

Also interesting to note it was also the longest drive I have done since installing FI an 1 hour and 15 minutes.

[Carlysh]

Originally Posted by vtmike

Fa20club said they have had it in their tune for a month and cars built in the last 2 months have the fix.

Sent from my SCH-I535 using Tapatalk 2

So your are saying if I am going to buy a Frs tomorrow it will have the fix of the popping sound just asking want to get good knowledge

[vtmike]

Originally Posted by Carlysh

So your are saying if I am going to buy a Frs tomorrow it will have the fix of the popping sound just asking want to get good knowledge

This is according to fa20club. If what they said is accurate there is still no guarantee when the car was made. Check the production date of the car you're looking to buy.

Sent from my SCH-I535 using Tapatalk 2