[matthewo]

Hi All,

Car started to misfire and run not so great at full and part throttle, took it into a shop I had used before to get them to take a look

I had the valve cover gasket replaced at this same time as it needed to be done before hand anyways, but the main reason I brought it in was because of it running bad. they found a fouled plug that they replaced, then they replaced a single injector with a -12 index injector. all my other injectors are -10, car had check engine light on the way home, reduced power mode. also car isn't running much better.

My fear is he didn't code it properly for flow, also you are supposed to at least replace all injector in that bank with -11 or -12 index to match, -10 an prior should not run together. The shop owner even printed me out an AllData.com BMW service bulletin stating this and said hey look at this it looks like more should be replaced or something.

Now here is the issue. I have a 3rd party warranty and they have already pissed off the shop and me, by trying to pay the least and I already had to shell out $250 for this visit for diagnostics and various other fees they wouldn't cover, and it was a battle just to get them to cover what they did.

How would I go about trying to get the warranty to cover the additional 2 injectors or even a whole complete set, I don't even know if I want to use the same shop as I wasn't completely confident in him coding the injectors correctly, he didn't seem to understand when I said flow match them.

I am not very happy at the moment after having my car gone a total of 5 days already with nothing much better, maybe just the likely hood of more arguing to try to get it just fixed to normal state.

[Abax335]

After market insurance sucks. Deal with them constantly at the dealer level, show them facts and proof from BMW in writing of this same situation and they only want to see the faults and want that sensor/component replaced.

It blows their mind when we have boost fault and can't fathom that its caused by a waste gate.

But you are right that bank needs to be replaced and calibrated.

With that being said you can induce a misfire yourself and store the fault for the insurance since they love faults and hate common sense and facts

[matthewo]

yeah not sure what to do, there is a recall 10E-A02 on the injectors that my car has, I checked the number and they match the ones they say to remove in the bulletin, but my Vin doesn't pull up any recalls other than HPFP extension.

I will probably be contact BMW NA, maybe I will have more luck with them over my warranty company...

[Abax335]

That's an old recall from years ago where the injectors were removed and scanned. I've done countless of those.

Good luck man!

[matthewo]

Thanks,

i think the previous owner tried to have them replaced but they wouldn't due to the fact that the vin didn't match years it affected even though it has the injectors that are listed as affected.

regardless I coded the replaced injector as it was 241 vs 180 before, as well as the guy swap around injectors so i had to recode a few for different cylinders.

need to drive the car some and see were it stands, if it still doesn't run great i will fight with the 3rd party warranty or just purchase 2 more from rock auto for around $120 each

[stashtrey]

Can't mix index 11 and under with index 12....

[matthewo]

yes I did read that.

I would like to find out more information specifically from BMW as to why not, for use as ammunition to my 3rd party warranty, as they usually just replace the bad component...

So far I haven't been able to see a clear cut reason as to why not, I guess even with flow matching through INPA it still just is not a good idea for whatever reason.

[stashtrey]

Originally Posted by matthewo

yes I did read that.

I would like to find out more information specifically from BMW as to why not, for use as ammunition to my 3rd party warranty, as they usually just replace the bad component...

So far I haven't been able to see a clear cut reason as to why not, I guess even with flow matching through INPA it still just is not a good idea for whatever reason.

Call your local dealer and they should help explain and/or provide your 3rd party people with the info. They simply do not jive ...there is a bulletin out there about it from BMW. I will see if I can find it.

[stashtrey]

Here is a quote from the most current N54 fuel injector replacement service bulletin:

"MPORTANT: Injectors with index 11 and higher have a different calibration and construction than injectors with index 10 and lower. Due to this difference, the injectors with index 11 and higher and injectors with index 10 and lower cannot be mixed on the same engine bank (i.e., cylinders 1-3 or 4-6). Once a bank of injectors is at index 11 or higher, the “bank set replacement” requirement no longer applies. For index 11 injector failures, only replace the failed injector"

[matthewo]

yeah I have that in the bulletin/recall data printout.

I drove the car today and its not acting very good, went completely back to stock back end and filled up with 93 octain. in Map 5 on jb4 under acceleration the car maxes out fuel trim and FOL is 83. something isn't right. maybe it need more time to learn but it also doesn't idle very good sometimes and a warm start had a knocking for a second or 2 and went away, also some starts the car idles low then shoots up, it also feels like it misses when you short shift to a low RPM then get on the gas like it struggles a lot.

I guess the miss matched injectors could play into some of this, but I still don't see why both banks are lean, also seemed a lot like a failing HPFP, but it shows good pressure under throttle from the logs.

[matthewo]

BMW NA will not do anything, but looks like my 3rd party warranty will replace the remaining 2 injectors as needed, hopefully this fixes the problem