Leaky injectors question

Msport335 · 08-14-2016, 10:17 PM

I suspect I have 2 leaky injectors due to a cold start misfire. Car now has new coils and plugs.

Can I purchase 2 used but good index 6 injectors to swap out the 2 that are leaking ?

Coding is still a requirement ?

jwebb335xi · 08-14-2016, 11:41 PM

Quote:

Originally Posted by Msport335

I suspect I have 2 leaky injectors due to a cold start misfire. Car now has new coils and plugs.

Can I purchase 2 used but good index 6 injectors to swap out the 2 that are leaking ?

Coding is still a requirement ?

My understanding is that you'll need to code injectors UNLESS the power and fuel numbers are the same. I swapped mine out and didn't have a single match, so I coded all through INPA, which takes almost no time at all once you have the software running.

You might find two rebuilt index 6, or could swap 3 new index 12 into the bank with bad injectors. Might check rock-auto for prices and availability. They are over $200 at the dealer.

titium · 08-15-2016, 02:09 AM

yes coding is required. it's required even if you switch the injectors (e.g. swap cyl 1 with cyl 2).

I wouldn't bother with used injectors they will just fail again.

CanadianTSi · 08-15-2016, 07:49 AM

Anything index 10 or less will be fine and yes they need to be coded. For the simple fact that they take 10 minutes to swap I don't mind swapping a bad one for a good used one.

Antetokounmpo · 08-15-2016, 08:51 AM

Quote:

Originally Posted by jwebb335xi

Quote:

Originally Posted by Msport335

I suspect I have 2 leaky injectors due to a cold start misfire. Car now has new coils and plugs.

Can I purchase 2 used but good index 6 injectors to swap out the 2 that are leaking ?

Coding is still a requirement ?

My understanding is that you'll need to code injectors UNLESS the power and fuel numbers are the same. I swapped mine out and didn't have a single match, so I coded all through INPA, which takes almost no time at all once you have the software running.

You might find two rebuilt index 6, or could swap 3 new index 12 into the bank with bad injectors. Might check rock-auto for prices and availability. They are over $200 at the dealer.

Rock auto has been around $200 for the last 6 months or so. I luckily picked 3 up there for $120 late last year.

brewnami · 08-15-2016, 01:03 PM

Not 100% on this, but I think that it is recommended that you replace the whole bank (3) as opposed to just pulling two. But, yes, coding is required. There are a few indexes that are interchangeable too.

RCB · 08-16-2016, 12:09 AM

You only need to replace them by bank (3 injectors) if you are using above index 10 as was stated above by CanadianTsi....who I assume is a former DSMer like myself

08-14-2016, 10:17 PM	#1
Msport335 Captain 97 Rep 804 Posts Drives: 2009 335i m-sport e90 Join Date: May 2013 Location: Burlington iTrader: (0)	Leaky injectors question I suspect I have 2 leaky injectors due to a cold start misfire. Car now has new coils and plugs. Can I purchase 2 used but good index 6 injectors to swap out the 2 that are leaking ? Coding is still a requirement ? __________________ E90 LCI M-sport/ 6AT/ LSD/ FBO+
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08-15-2016, 02:09 AM	#3
titium Major 327 Rep 960 Posts Drives: 2009 BMW 135i Join Date: Jun 2015 Location: Sydney iTrader: (0)	yes coding is required. it's required even if you switch the injectors (e.g. swap cyl 1 with cyl 2). I wouldn't bother with used injectors they will just fail again.
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08-15-2016, 07:49 AM	#4
CanadianTSi Captain 207 Rep 602 Posts Drives: 2014 535 xDrive Diesel Join Date: Feb 2007 Location: Alberta iTrader: (0)	Anything index 10 or less will be fine and yes they need to be coded. For the simple fact that they take 10 minutes to swap I don't mind swapping a bad one for a good used one.
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08-15-2016, 01:03 PM	#6
brewnami Major 100 Rep 1,040 Posts Drives: 2009 BMW 335i M Sport Coupe Join Date: Aug 2013 Location: Boston, MA iTrader: (5)	Not 100% on this, but I think that it is recommended that you replace the whole bank (3) as opposed to just pulling two. But, yes, coding is required. There are a few indexes that are interchangeable too. __________________ 2009 335i M Sport coupe, BSM with black/aluminum interior, 6MT, JB4 G5, MDH Backend Flash, Walbro 255 inline LPFP, VRSF Inlets, BMS 3" catless DP's, Borla Aggressive catback, ER FMIC, ER charge pipe, Tial BOV, BMS 2.3 gal Meth Kit, BMS Sport Oil Cooler Valve, Ported CDV, RB PCV, Cyba ram air scoops, Status Gruppe SRS coilovers, ECS trailing arms, Forgestar F14 SDC.
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08-16-2016, 12:09 AM	#7
RCB Enlisted Member 28 Rep 42 Posts Drives: 2008 535Xit E61 Join Date: Apr 2015 Location: Boston iTrader: (0)	You only need to replace them by bank (3 injectors) if you are using above index 10 as was stated above by CanadianTsi....who I assume is a former DSMer like myself
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