Engine RPM problem and diagnostic tool malfunction

[Black_raven]

Good evening, everyone.

I am a newcomer, therefore I kindly need your understanding. I apologies if the concerns I provide have been already addressed.


I own a 2001 E320 Avantgarde (W210). The vehicle has just ceased to accelerate appropriately; the kickdown feature is inoperative, and the engine will not exceed 3000 RPM. I gathered from a post I saw here that it is probable the MAF sensor is the issue. I have ordered a cleaning to test; if it proves ineffective, I will replace the sensor to see whether that resolves the problem. Could you kindly verify if I am proceeding correctly? Occasionally, it attempts to regain functionality, often after first startup, but only momentarily before reverting to restricted acceleration and RPM.

The second problem pertains to my acquisition of a RICOKEY Car OBD2 Scanner Universal Wired Auto Engine Fault Code Reader CAN Diagnostic Scan Tool V309.

Nevertheless, regardless of my efforts, I am unable to establish a connection with or get data from the vehicle. I suspected that the scanner I had acquired was incompatible, so I got a MOTOPOWER MP69033 OBD2 Scanner Universal Car Engine Fault Code Reader.
https://www.amazon.co.uk/dp/B07Z3HB7DR?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1

Regrettably, the same problem has arisen, and it fails to connect or read the vehicle. I adhered to the directions by activating the ignition, choosing the option to read codes, and each time the reader attempts to establish a connection. Nonetheless, it consistently displays a warning instructing to wait 10 seconds before attempting again.

The port is functional, since the technician at the nearby garage used a rudimentary reader to successfully get the codes earlier. I believed I could get a reader to avoid delivering it to him, but I must be making an error, or the devices I have acquired are incompatible.

Any assistance or guidance would be much appreciated.

[vitessear3]

They are inexpensive Chinese products; you will need to invest far more money for a quality scanner.

[Black_raven]

Ah, I understand. Do you have any recommendations?

[trikey]

Your suspicion of a MAF problem is likely correct. Upon acquiring a reliable code reader, a fault code will be recorded when the system enters limp mode.
The preferred code reader seems to be the iCarsoft V2, however a more recent version may possibly be available. Exercise caution when purchasing from a reliable source (avoid eBay) since counterfeit readers may be available that do not support upgrades. Although it is not inexpensive, it effectively performs its function and may minimise diagnostic expenses for various problems.

[Needsnewtyres2]

I was also deterred by the expense of a quality fault code scanner.
Following the recommendations provided, I purchased an identical Icarsoft model.
Undoubtedly not inexpensive, however....

It has recouped its cost and generated more value upon first usage.

[Black_raven]

That is excellent. Thank you for the counsel. I shall endeavour to get one of them and assess my progress. I will provide updates here as I resolve the issue, so my experiences may assist anyone facing similar challenges in the future.

[torque2me]

I own a Foxwell NT530, purchased from a UK seller, equipped with the whole Mercedes software. While it was not the least expensive option, its capabilities are extensive. Additionally, it will do a fundamental scan of other brands.

[Black_raven]

I would want to provide an update here.

In accordance with the recommendations provided, I have acquired an MB Icarsoft V2 reader. It seems to provide somewhat more functionality than I want, however I may consider using other features now that I own it. Nonetheless, I was able to read the problem codes, unlike the two inexpensive alternatives I had previously acquired. While I could have interpreted the error codes, there were none available for analysis. No errors are evident, which is advantageous in one regard, however it leaves me no closer to resolving my problem.


I acquired MAF sensor cleaner and subsequently detached the sensor for cleaning. Reinsert it, and the issues persisted. I then acquired a new MAF sensor (Hella Air Mass Meter HELLA Air Mass Meter | GSF Car Parts). Less expensive alternatives existed, some much more affordable. Nonetheless, whether justified or not, I maintain that one often receives commensurate value for their expenditure; hence, I selected a more costly option.

The installation has been completed, and the vehicle has returned to its usual functioning state. It now exceeds 3000rpm when stationary and accelerates as it once did; also, the kickdown functionality has been restored.

I achieved 40 miles per gallon on a 60-mile journey that did not include motorways or dual carriageways. I am uncertain if that is advantageous or detrimental for a 2001 E320 W210. Nevertheless, I was enough pleased with it. I would want to ascertain if this aligns with expectations or the miles per gallon others experience.

It will be intriguing to see if the new MAF sensor impacts the miles per gallon. I will provide an additional report when I have undertaken a comparable travel.

Thank you.

[Gianni682]

Hi,

 

I too had a problem wit the engine to my 2021 tryumph  but everything was solved quickly.

 

Regards