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No complaints but a lurch on cold idle CLK350 M272

Tinonline

New Member
Joined
Aug 19, 2020
Messages
8
Location
Reading
Car
CLK350; Lexus LS400
A few years since I last posted...

MOT's have come and gone. Only a pair of drop links unexpectedly caused a fail this year.

My beloved Lexus LS400 has gone to a new owner and the CLK is the main worker. Currently 70k on the clock. (Year 2007) M272.

Now, on cold when warming up at idle...I get an intermittant rev drop, a stumble, sometimes you think it will stall but it picks up. Once warm/hot the issue stops. Unbelievably there are no definative posts on resolving the issue with certianty.

I've replaced all solenoids with the latest revised part number around 2 years ago. Bank A top one threw a code the other day out of the blue so I'm thinking these are consumable items but since clearing said code (touch wood) nothing has reoccured. I have a non Merc one as a spare I feel tempted to fit. (The engine number is outside the camshaft sprocket problem range).

It's not due anything parts-wise yet and no codes are present. I added some injector cleaner but difference. It's a while ago since I've used MAF cleaner and a dose of Cataclean.

I will replace sparkplugs, coils, airfilter as a proactive maintenance measure.

Any thoughts/ideas/similar experiences most welcome? :)
 

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