Injector Replaced -- Questions

jwebb335xi · 03-25-2016, 07:31 AM

Hey guys,

I've got a tuned 2008 335xi as shown in my signature. It had a new HPFP and injectors installed in December of 2010.

This past weekend the car ran like crap (stumbling idle, SES and multi cylinder misfires codes). I cleaned the VANOS solenoid, checked all vacuum lines, leads to coils, and anything i could visually inspect. And, it drove fine until Wednesday afternoon when it just plain died. Fortunately i was near my local indy and i literally coasted into their lot with - as it turns out - one injector leaking fuel everywhere..

They replaced that one injector, cleaned my plugs, changed the oil and I picked-up the car last night. I filled it up with a fresh tank of gas and drove only about 10 miles. It runs just fine, but I noticed when I got home that the car -- and exhaust -- smell like fuel. I didn't expect that given that it didn't do that until it catastrophically failed on Wednesday and that it seems to be running fine.

I plan to remove Cobb this morning entirely, but may "monitor" and "log" under normal driving today.

Questions:

Should the car still smell like fuel at this point?
Given they replaced ONE injector and the others have 50k miles, i'll replace the remaining injectors in the next few weeks. Are the ones available at ROCK AUTO a match to our part number ending in 79?
I use a Mac for my laptop, but have a PC I could drag out to my garage with a very, very long ethernet cable. Can I use one of those for remote coding-in of the new injectors?
Who does the remote coding that's trusted to nail it right?

msjt · 03-25-2016, 07:42 AM

The part number does not matter for the injectors, its the index that matters. Index 11 and 12 cannot be mixed with lower index injectors, and you need to replace the decoupling elements every time they are changed. You can do one bank at a time, but make sure that they are properly coded through INPA. Fuel smell through the exhaust is definitely a sign that they are failing.

muncie21 · 03-26-2016, 11:18 AM

The coding part isn't hard (provided you have a working copy of INPA or similar) as the values the need to be entered/coded are printed on each injector.

In the pic below, the "-12" at the end of the part number indicates these are index 12s. The 581 & 220 numbers below the 2d matrix are the values that must be coded in the DME. One number is for flow and the other is energy, I believe.

03-25-2016, 07:31 AM	#1
jwebb335xi Major 205 Rep 1,070 Posts Drives: 2008 335 XI Join Date: Jun 2014 Location: Chicago Burbs iTrader: (0)	Injector Replaced -- Questions Hey guys, I've got a tuned 2008 335xi as shown in my signature. It had a new HPFP and injectors installed in December of 2010. This past weekend the car ran like crap (stumbling idle, SES and multi cylinder misfires codes). I cleaned the VANOS solenoid, checked all vacuum lines, leads to coils, and anything i could visually inspect. And, it drove fine until Wednesday afternoon when it just plain died. Fortunately i was near my local indy and i literally coasted into their lot with - as it turns out - one injector leaking fuel everywhere.. They replaced that one injector, cleaned my plugs, changed the oil and I picked-up the car last night. I filled it up with a fresh tank of gas and drove only about 10 miles. It runs just fine, but I noticed when I got home that the car -- and exhaust -- smell like fuel. I didn't expect that given that it didn't do that until it catastrophically failed on Wednesday and that it seems to be running fine. I plan to remove Cobb this morning entirely, but may "monitor" and "log" under normal driving today. Questions: Should the car still smell like fuel at this point? Given they replaced ONE injector and the others have 50k miles, i'll replace the remaining injectors in the next few weeks. Are the ones available at ROCK AUTO a match to our part number ending in 79? I use a Mac for my laptop, but have a PC I could drag out to my garage with a very, very long ethernet cable. Can I use one of those for remote coding-in of the new injectors? Who does the remote coding that's trusted to nail it right? __________________ JWebb335xi MHD / Wedge / 93 Octane/ xHP / FMIC / Inlets / Catted DPs / CP / DVs
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03-25-2016, 07:42 AM	#2
msjt First Lieutenant 160 Rep 305 Posts Drives: e92 335i Join Date: Jan 2013 Location: queens, nyc iTrader: (0)	The part number does not matter for the injectors, its the index that matters. Index 11 and 12 cannot be mixed with lower index injectors, and you need to replace the decoupling elements every time they are changed. You can do one bank at a time, but make sure that they are properly coded through INPA. Fuel smell through the exhaust is definitely a sign that they are failing.
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03-26-2016, 11:18 AM	#3
muncie21 First Lieutenant 122 Rep 397 Posts Drives: 335ix Join Date: Sep 2015 Location: PA iTrader: (0)	The coding part isn't hard (provided you have a working copy of INPA or similar) as the values the need to be entered/coded are printed on each injector. In the pic below, the "-12" at the end of the part number indicates these are index 12s. The 581 & 220 numbers below the 2d matrix are the values that must be coded in the DME. One number is for flow and the other is energy, I believe.
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