Leaky Injectors?

impuls

Specialist
Jan 28, 2018
92
60
0
Ride
'07 335i
Just installed new NKG plugs to fix cylinder misfires but the old (500 miles) OEM Bosh spark plugs didn't look that nice either when they came out. Additionally the new plugs did not fix the misfire as you can see in this log https://datazap.me/u/impuls/misfire

Do you think I am right with assuming leaky injector on cylinder 6?
(Considering the messy spark plug and the fact that it smelled like fool when I insalled new OE plugs before)

Is it normal (with leaky injectors) that fuel on the spark plug is dark and that the whole thread of the spark plug is wet?

Is it likely that there is another serious issue?
Installing new injectors into a blown motor would be quite huge waste of time...

What about spark plug 3?
Looks quite different than the other plugs, but could that still be just normal?

Cylinder 6:
Strong fuel smell and wet.
Thread is wet too.
Liquid is quite dark and thick, but smells like fuel.

20180410_210326.jpg


Cylinder 3:
Doe not smell like fuel and is dry.

20180410_210425.jpg



Others

20180410_220725.jpg
 

impuls

Specialist
Jan 28, 2018
92
60
0
Ride
'07 335i
That's coil #6
20180411_091413.jpg 20180411_091419.jpg

ant that's plug #6 after driving approximately 1 mile and sitting int the car one night, smelling already quite "fuelish"...

20180411_091557.jpg

and that's cylinder #6 without the spark plug

20180411_091637.jpg
 

NoQuarter

Major
Nov 24, 2017
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Indiana, USA
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Z4 35is, 535xi, X5 35i
The coil looks ok from the pic. How does that spark plug well look? From the pic it looks like it may be a bit gunky down in there? If so, clean it out really good, remove the liner, clean everything with some alcohol, and try again?

What is the index nbr on the injector?
 

Jeffman

Captain
Jan 7, 2017
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From the pic you can almost make out “08” as the index number on the injector.
 

impuls

Specialist
Jan 28, 2018
92
60
0
Ride
'07 335i
The injectors are index 08 indeed.

The spark plug well doesn't look too gunky, but I should finally put my endoscope to good use and have a closer look...

Maybe I should just go ahead an buy new injectors while there are affordable ones still available...

From what you know now, do you have any suspicion that something besides injectors is wrong with the car?
Do you think it is likely that injectors are actually not broken at all?
 

Jeffman

Captain
Jan 7, 2017
1,498
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Better hurry to go buy injectors. FCP just took them off sale and now they’re $1500/set.
 

impuls

Specialist
Jan 28, 2018
92
60
0
Ride
'07 335i
I would have bought those http://znmperformance.com/bmw-fuel-injector-genuine-bmw-13538648937ktznm/
Seems to be quite a good deal considering the lifetime warranty.

Unfortunately no option to ship to Germany on the page only country in EU is United Kingdom (seriously, why?)

Maybe @[email protected] can help?

135$ from https://www.bavauto.com/13-53-8-648-937 is also a good deal, but somehow I doubt they are really able to deliver.
Typically Ships In 3-5 Days.
Sound like "We will order the part from BMW and then ship."

I don't like "Index 11" or higher http://www.rmeuropean.com/Products/13538648937-MFG177.aspx or on various seemingly legit offers like https://www.ebay.com/itm/362070357388?ViewItem=&item=362070357388 from very active sellers on EBay...
 
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impuls

Specialist
Jan 28, 2018
92
60
0
Ride
'07 335i
Ordered the injectors at znmperformance.com on Friday and they went out today.
Matt added "Germany" as shipping location basically 1/2 hour after I sent the inquiry.