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

[Asphaltfrs1]

Originally Posted by ATL BRZ

Not likely related, probably just exhaust backfires, which are normal especially with aftermarket exhaust.

I had this issue with the stock exhaust. First time I heard it it was embarrassing to say the least lol

[fishek]

Originally Posted by romin

I first hit CEL P0351, cylinder 1, while running on the track, cleared it a couple times but it kept coming back.

^^^ This (though not sure which cylinder/coil pack).

I took it to the dealer. They asked me if I had any mods and I said I don't have any mods to the powertrain. They replaced the coils under warranty.

I had one track day after that but was a low speed track and not much WOT and no CEL. I will be on the track this weekend on two much faster tracks. I will see if I get any CEL and report here.

[romin]

Given this diagram:


I believe this teflon ring is the part that folks have found damaged or completely missing from their direct injectors:


Can someone confirm?
Did other folks find additional parts damaged?

Update, others have also found these insulators damaged on many vehicles:

[peachch]

Originally Posted by romin

Given this diagram:


I believe this teflon ring is the part that folks have found damaged or completely missing from their direct injectors:


Can someone confirm?
Did other folks find additional parts damaged?

That is O-Ring. You also need direct port injector insulator.

[peachch]

I think most of us replaced only insulators. Somehow, I got one missing O-Ring injector. Then, I replaced both.

[romin]

Originally Posted by peachch

I think most of us replaced only insulators. Somehow, I got one missing O-Ring injector. Then, I replaced both.

OK cool, I have four of the insulators as well.
What kind of damage did you find on the insulator, any photos?

[peachch]

Originally Posted by romin

OK cool, I have four of the insulators as well.
What kind of damage did you find on the insulator, any photos?

The picture I posted above is where the insulators got damage. The coating was gone.

[romin]

Originally Posted by peachch

The picture I posted above is where the insulators got damage. The coating was gone.

Did you replace these parts yourself?

[peachch]

Originally Posted by romin

Did you replace these parts yourself?

The hardest part is replacing O-ring since I do not have SST.

[Amadeus]

Can anyone describe or have photos of the visual clues to look for? Will there be fuel residue or some other indicator where the fuel injectors insert into the block? Is some fuel exiting past the Teflon seal? You could make a regular visual inspection when you check oil level or something.

[2forme]

FWIW, I talked to someone at Subaru this weekend about TSB 11-130-13. Apparently it replaces a "shim" of sorts for the camshaft position sensor. I guess there were some instances where this shim was out of spec from the factory and can cause vibration in the CPS leading to misfires and also idle problems.

[mad_sb]

Originally Posted by peachch

I think most of us replaced only insulators. Somehow, I got one missing O-Ring injector. Then, I replaced both.

So, what symptoms did you and the others you mention as "us" have?

[peachch]

Originally Posted by mad_sb

So, what symptoms did you and the others you mention as "us" have?

http://www.ft86club.com/forums/showt...t=20930&page=2

[mad_sb]

Originally Posted by peachch

http://www.ft86club.com/forums/showt...t=20930&page=2

Wow, that really is a pop sound, like a pop-gun or the pop noise you make with your finger flipping it out of your mouth... lol I thought you meant pop like a small explosion in the intake runner would make....

So, without that teflon seal, combustion gases were getting up the shaft of the injector, hence why #1 was brown and nasty while #3 was clean. The pop noise must be that insulator popping out of place under the pressure and that explains why it was worn down on the side.

Any word if the seal did not get installed at the factory or just melted or what?

Did you ever get miss-fire codes?