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carlosmp carlosmp is offline
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Car: 2008 E60
Default Replacing Injectors - 08-20-2019, 01:03 PM

Been chasing down a misfire, and after replacing sparks and coils @ 95k miles, got better for a while, and then back to a really rough idle/run. it seems that I'm still getting a misfire in cyl6. kWould sometimes clear itslef out and then come back. Now it's seems to be permanently here for the past couple of days.

From dealer records, 5 of 6 injectors (along with the HPFP) were replaced March 2011 @ 35k. Not sure why not all 6, but whatever. Car is beyond the 10yr/120k so no free injector replacement.

Found some injectors Index 9, and wondering if there's anything terrible about index 9 other than I may end up exactly where I am in another 50k miles?. I can do all 6 for about the cost of 2 Index 12. Don't know what index the current ones are, but since it's from 2011 recall, Index 9 seems like a likely candidate, maybe 8. They used 13-53-7-585-261.

Other options is remanufactured/refurbished, but not sure what that means, or what to expec. For a full set of Index 12 about $300, maybe it's worth a shot? At least I'll replace 4-6 for now and have some spares?

Thanks in advance,

Carlos.


2008 E60 535i AT
Upgrades - MHD Stage 1, xHP Stage 3
Path to 500 - CP/BOV, DCI, JB4, Stage 2 LPFP, MHD Stage 2+, Inlets, Outlets, FMIC, Down tubes
(can't use d followed by p or the actual p word...lol)
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codesx's Avatar
codesx codesx is offline
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Car: 2008 335i Vert (E93, N54)
Default 08-21-2019, 09:30 AM

Quote:
Originally Posted by carlosmp
For a full set of Index 12 about $300,

Hey carlosmp,

Are you stating you found a full set of Index 12 for approx $300, or $300 for each of the 6? ($1800)

If 300 for the set, please PM me and I'll by immediately.


Index 9 appear to have the worst track record, statistically, and thus whey Amazon is littered with them.
Index 12 is current and thus believed to be the best.

My original Index 8 are leaking more frequently, at 195,000km.




2008 335i Convertible, E93, N54, A/T (200,000+ km)
Wheels: 322 | Tires: R.275/35r18, F.245/40r18
TUNE: JB4/Trebila | 24 PSI | 100% Meth via dual CM5 | 94 Octane
BMS: JB4, Map 6 | WMI | 5" FMIC | OCC | DCI | Cowel Filters
RB: Inlets | PCV Valve
VRSF: DiPis | CP
HKS BOV
xHP Stage 3
NGK-97506 @ .020

Maintenance:
2018 - A/T Replaced | Ign Coils | Walnut Blast
2019 - Index 12 Injectors | VCG | OFHG & O-rings | TStat
2020 - OPG | Battery | IBS | Water Pump | Plugs | Alternator
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carlosmp carlosmp is offline
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Car: 2008 E60
Default 08-21-2019, 09:44 AM

I wish it was "new" index 12...That was for set of 6 Index 12 Reman/refurb/used...for around $300 on fleabay. Not sure what to expect.

Ordered 3 of the index 9 and we'll see what shows up. One has to be better than what I have causing the misfire. If that fixes the issue, i'll run with that, and when the next one leaks, i'll make a decision to go to 12's or not. Or if i decide to get more power quicker...


2008 E60 535i AT
Upgrades - MHD Stage 1, xHP Stage 3
Path to 500 - CP/BOV, DCI, JB4, Stage 2 LPFP, MHD Stage 2+, Inlets, Outlets, FMIC, Down tubes
(can't use d followed by p or the actual p word...lol)
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Zeezul Zeezul is offline
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Car: e92 n54 pre lci
Default 08-21-2019, 09:44 AM

Yeah, 300 bucks for all 6 index 12s is a crazy deal if true. I would steer away from index 9s. I bought 3 new index 12s and 3 used ones off ebay all. Installed them myself. Working great. No more exhaust blow by or fuel in oil.


FBO MT N54 w/stock turbos-tuned by Trebila
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Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
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Car: E92 335XI
Default 08-21-2019, 11:37 AM

beleive index 9 are the most prone to fail hence why they have been popping up - I'd stay awya from the 9s


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HyTeK HyTeK is offline
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Car: 2009 335xi E90
Default 08-23-2019, 07:08 PM

From my very first hand, and recent experience, DO NOT BUY REBUILT INJECTORS of any index.

My car had a full set of index 9, which were already replaced under warranty with another set of index 9 (prior to my ownership of the car). Bank 3 got stuck open right at the same time the LPFP went out. Got the LPFP replaced, and I needed the car at least running, so I bought a $40USD rebuilt index 9 with similar pattern numbers. Popped it in, coded in the new values, and car ran "okay" at stock for the next 6-9 months. I could not go above 10psi no matter what. Stock it would still misfire often, but at least it wasn't stuck open.

Fast forward to the past few weeks. Bank 3 started to get misfires again, so I bought an entire set of index 12, brand new injectors for $1200USD. This log thread details details the info and logs with the new injectors. This link describes the differences with index 9/12.

Now the car is running pretty good on map 5.

Long story short: if you want to run above stock, DO NOT get rebuilt injectors no matter what their index. If someone is selling a "rebuilt" index 12 injector, they are lying and they are not index 12 (get the part number in full and reference the link above), or it is index 12 and its a bum injector with new ring sets installed and cleaned up to "look" rebuilt. Shiny does not mean it works
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HyTeK HyTeK is offline
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Car: 2009 335xi E90
Default 08-23-2019, 08:29 PM

Was trying to find my other injector links in my favorites. Found em!

Pelican had some info about Index <= 10, and Index >= 11 differences. There isn't much material there to read, but it's another source.

The last source for injector issues, though not index related, is broken mounts and mounting tabs.
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