Rebuild engine after 600 miles - Oil smells again like fuel

TheMidnightNarwhal · 03-18-2019, 07:16 AM

Quote:

Originally Posted by Chris@VargasTurboTech

Injector issue. Taking a while to get to 234 on decel is classic injector leaking symptoms.

Sorry what value is 234 referred to here?

John.N · 03-18-2019, 08:52 AM

Pulled and Swapped all my plugs yesterday.

No fuel on #2 as I previously saw. Not sure if that's because I pulled the plugs within 30 minutes of the engine running or if the issue is intermittent.

They were all dirty, but 2 out of the 6 were not as black as the others.

~40 miles on the new plugs, no real noticeable difference in performance/feel. Thought I may have felt a little shutter/misfire this morning when coming to a stop light (engine at operating temp after 25 miles on highway).
I'll keep an eye on it and check the logs for any potential misfires.

Maybe changing O2 sensors is your best route... They are relatively cheap parts

JohnDaviz · 03-18-2019, 09:04 AM

Quote:

Originally Posted by FCobra94

Stranger things have happened...swap in new O2s, reset adaptations, and try again.

Quote:

Originally Posted by John.N

Maybe changing O2 sensors is your best route... They are relatively cheap parts

hehe

I ordered them already. Will change Bank 1 completely.

type-dRew · 03-18-2019, 09:10 AM

Hopefully bought those injectors from FCP and they can warranty for you.

Hate to see new parts go bad.

Chris@VargasTurboTech · 03-18-2019, 10:01 PM

Quote:

Originally Posted by TheMidnightNarwhal

Sorry what value is 234 referred to here?

Max A/F ratio (max lean)

NapsterAU · 03-20-2019, 05:49 AM

My AFR's do almost the same thing where bank 2 goes straight to 234 while bank 1 struggles even after replacing the entire bank of injectors with some spare ones.
This happened right after replacing O2's with new ones. Suspecting it's DOA. I am yet to change out bank 1's O2 sensor with another new one but just find it odd that this issue popped up right after the new sensors went in.
Guess it happens but supplier was very helpful in sending out a replacement for the affected bank

JohnDaviz · 03-25-2019, 07:15 AM

Wanted to change o2s on the weeekend but lost the tool...

Received today.

So far the car is running great. AFR 1 bank is not being weird except rich afr during stops.

Oil does not smell like fuel anymore.

Seller is a big car seller and has accepted to check the injector for free to check if it is leaking. Will send it today.

I will give my final feedback when o2 sensors are in and the seller checked the injector!

Thanks everybody for the great support and help!!

03-18-2019, 08:52 AM	#24
John.N New Member 2 Rep 15 Posts Drives: '12 335is Join Date: Apr 2016 Location: Memphis, TN iTrader: (0)	Pulled and Swapped all my plugs yesterday. No fuel on #2 as I previously saw. Not sure if that's because I pulled the plugs within 30 minutes of the engine running or if the issue is intermittent. They were all dirty, but 2 out of the 6 were not as black as the others. ~40 miles on the new plugs, no real noticeable difference in performance/feel. Thought I may have felt a little shutter/misfire this morning when coming to a stop light (engine at operating temp after 25 miles on highway). I'll keep an eye on it and check the logs for any potential misfires. Maybe changing O2 sensors is your best route... They are relatively cheap parts
	Appreciate 0 Quote

03-18-2019, 09:10 AM	#26
type-dRew Major 641 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	Hopefully bought those injectors from FCP and they can warranty for you. Hate to see new parts go bad.
	Appreciate 0 Quote

03-20-2019, 05:49 AM	#28
NapsterAU Private 12 Rep 33 Posts Drives: 2008 335i N54 MSport Join Date: Aug 2015 Location: Gold Coast - Australia iTrader: (0)	My AFR's do almost the same thing where bank 2 goes straight to 234 while bank 1 struggles even after replacing the entire bank of injectors with some spare ones. This happened right after replacing O2's with new ones. Suspecting it's DOA. I am yet to change out bank 1's O2 sensor with another new one but just find it odd that this issue popped up right after the new sensors went in. Guess it happens but supplier was very helpful in sending out a replacement for the affected bank Last edited by NapsterAU; 03-20-2019 at 05:54 AM..
	Appreciate 1 Quote

03-25-2019, 07:15 AM	#29
JohnDaviz Private 42 Rep 67 Posts Drives: E92 N54 Join Date: Sep 2018 Location: Germany iTrader: (0)	Wanted to change o2s on the weeekend but lost the tool... Received today. So far the car is running great. AFR 1 bank is not being weird except rich afr during stops. Oil does not smell like fuel anymore. Seller is a big car seller and has accepted to check the injector for free to check if it is leaking. Will send it today. I will give my final feedback when o2 sensors are in and the seller checked the injector! Thanks everybody for the great support and help!!
	Appreciate 0 Quote