Another performance problem, engine light on

[sstylos]

Hi people,

I have a CLK 200K and as many of you I have the famous performance problem.
My CLK was using LPG when I faced my first performance problems. It was misfiring when I was fully press the gas pedal. I changed spark plugs, ignition coils with their boots, cleaned MAF, and for 2 days everything was ok. After the 2 days misfires disappears but a performance problem now can be observed.

Problem goes continuous worst until I notice it on gas too.
I thought it is the catalyst so I removed him. Problem was going worst and I cannot use LPG as engine was shaking around. The last 2 moths I don’t use LPG at all.

At this point I followed the classic performance cure, change MAF (new, not original from eBay) and EGR valve. Problem still exists.

After some days I have my first engine lights. P2038 and some codes related to catalyst and lambda. So I put back the catalyst. After that I still take the catalyst and lambda sensors errors, so I have order one from eBay.

Until I’ll have a new sensor I take some OBD codes: P2038 again and P0204, P2000.

Do you believe new oxygen (lambda) sensors and catalyst will cure it?
Do you believe it may is something else ?

I will upload 2 screen pics from digimoto.
Please heeelllpppp

 

[sstylos]

Please advice if I'll have to watch specific values with OBD and digimoto

 

[Dieselman]

That looks like a misfire being picked up by the lambda sensors. Interestingly both banks are missing at the same time.
Check the MAF output and the crank sensor, then go through the HT side again.

 

[sstylos]

OBD II codes
P2038 charging pressure too low.[P0243]
P0204 Injector Circuit Malfunction - Cylinder 4

 

[gazz]

This is not a vee engine - it only has one bank. The car is fitted with pre and post catalytic converter lambda sensors. By removing the cat you will provoke lambda related fault codes, as cat performance is monitored. P0204 relates to a wiring, injector or ECU fault associated with the injector on cylinder 4.

 

[gazz]

...but I see you know that!! Just beat me to it!!

 

[Dieselman]

This is not a vee engine - it only has one bank.

Thanks, for some reason I thought it was a 240.

I agree with your comment of injector problem and the Cats.

It also looks like there may be a boost leakage issue as well.

 

[sstylos]

...but I see you know that!! Just beat me to it!!

If I knew I wouldn't ask. Thanks for your input gazz

 

[sstylos]

That looks like a misfire being picked up by the lambda sensors. Interestingly both banks are missing at the same time.
Check the MAF output and the crank sensor, then go through the HT side again.

I can put in graph MAF. Does anybody knows ranges in g/s while idle and in motion?

 

[Dieselman]

Approx 2v at idle rising to 4.6v at full engine speed.

It should rise smoothly and be steady at all times.

From your prevoius post you have a cyl 4 misfire.

 

[sstylos]

I found the following tests for lambda sesnsors:
http://www.lambdapower.co.uk/Diagnosis/Diagnostic_index.asp

I'll try to use my polymeter

 

[sstylos]

BTW I have write by mistake code P2000 when I had P2001.
I found message "NOx Trap Efficiency Below Threshold (Bank 2)"
but this is not a diesel car.
I found messages too:
P2001 - [8] M16/6 (throttle valve actuator) ,: M16/6 (throttle valve actuator) , PWM signal: threshold 1
P2001 P0638 [1] M16/6 (throttle valve actuator) ,: Plausibility Position Throttle valve [P0638]
P2001 P0638 [2] M16/6 (throttle valve actuator) ,: M16/6 (throttle valve actuator) , PWM signal: threshold 2 [P0638]
P2001 P0638 [4] M16/6 (throttle valve actuator) ,: M16/6 (throttle valve actuator) , PWM signal switched off [P0638]

My car is CLK200K made on 01/2001.
What is the correct P2001 message?

http://www.bba-reman.com/auto-mine/problem.aspx?problem=Mercedes ME(Sim-4) Engine 111
http://www.bba-reman.com/content.aspx?content=Mercedes_common_fault_codes

 

[Dieselman]

Throttle valve actuator.
It's the motor that operates the throttle flap, looks like the feedback reading is implausible compared to the Pulse Width input.

 

[sstylos]

Lambda sensor arrived, MB indie fitted and he told me it takes P2022 (problem with the heating circuit)

It was sold as part # 0005409217 for Mercedes C180 C CLK 200 230 and compressors after 97 .

Does 0005409217 (if it was original) is the correct part for my CLK200K 01/2001 ? If not what part# is the correct?