Very bad fuel consumption + System rich/lean

[ahmadsharbaji]

I have C230 2007 Sport. I'm really tired of mechanics right here (with respect) So I have to try it myself!

My problem is that my system is too rich, I smell gasoline from the exhaust, and I have a very very very bad fuel consumption. The car should go around 160km per 20L, while it does 90~95km only.

Please read my live data with me, and try to find out what is the real cause.
Is it the MAF sensor? (knowing that I cleaned very well with a MAF cleaner spray).
The O2 sensors? if yes which ones? Are the ones before the catalytic converters or after?

See the ratio I did some research and found that it should be 14 air and 1 fuel, while here I have it 14 and 62~~~>>>???
And see the MAF reading at ide + at 2500 RPM, is this indicating that the MAF is good?

I'm really tired of this. I hate to smell the gasoline out of my exhaust pipe every day...

Please see the photos. Thanks in advance.

Update: Here is a short video monitoring the O2 sensors 1 Video
And I have this code:

• P2096 Code - Post Catalyst Fuel Trim System Too Lean Bank 1

 

[Kev555]

Air intake temp 46 degrees? where do you live? if its the UK, something isn't right with your MAF

 

[ahmadsharbaji]

Air intake temp 46 degrees? where do you live? if its the UK, something isn't right with your MAF

I live in Lebanon (Middle East). The temp now is around 15°C

 

[rayhennig]

The car should go around 160km per 20L

Even that's bad at around 12.5 litres/100 Km or less than 23 mpg. My 1991 300-24 only uses about 10 litres. I would expect your much later car to be using much less than mine.

Comments anyone?

RayH

 

[Steve@Avantgarde]

I have C230 2007 Sport. I'm really tired of mechanics right here (with respect) So I have to try it myself!

My problem is that my system is too rich, I smell gasoline from the exhaust, and I have a very very very bad fuel consumption. The car should go around 160km per 20L, while it does 90~95km only.

Please read my live data with me, and try to find out what is the real cause.
Is it the MAF sensor? (knowing that I cleaned very well with a MAF cleaner spray).
The O2 sensors? if yes which ones? Are the ones before the catalytic converters or after?

See the ratio I did some research and found that it should be 14 air and 1 fuel, while here I have it 14 and 62~~~>>>???
And see the MAF reading at ide + at 2500 RPM, is this indicating that the MAF is good?

I'm really tired of this. I hate to smell the gasoline out of my exhaust pipe every day...

Please see the photos. Thanks in advance.

Update: Here is a short video monitoring the O2 sensors 1 Video
And I have this code:

• P2096 Code - Post Catalyst Fuel Trim System Too Lean Bank 1

With respect, you probably havent reached out to the right technicians, garages or mechanics.

I've looked at the live data, and because its done with a generic scanner, it doesnt really offer any insights that could lead you to a concrete path of diagnosis.

As was said on the other thread, seek a mercedes specialist who has Xentry STAR diagnosis. That piece of kit is powerful in the hands of the right people with guided fault finding, live data with compartive actual value data so you can see whether your live data matches what the specificed values should be (not some internet based theory), component actuation that will test everything from ECU > Wiring > Sensors as well other forms of testing that will lead you to the necessary repair.

Everything else is just guess work and supposition based on a couple of screen shots of data, which even the most skilled and competent of technician will struggle to advise you on without having your car in front of them.

It's not like this is (a) a common engine of its period (b) a common fault with that particular engine (c) its very obvious to fix based on the little information we have about it.

 

[Kev555]

As Steve said above, sound advice.