Hello,
Could you please clarify if this "No acceleration " problem relates to no acceleration at all or if the vehicle will accelerate but only very slowly?
If the vehicle will accelerate slowly and the issue is accompanied by a low idle speed then I would suggest to have your mechanic look at a possible sticky EGR valve or a sticky air control flap. These components are known to coke up and possible require cleaning.
Please see description of how a throttle actuator works (petrol vehicle) but similar in operation on your diesel engine.
https://www.2carpros.com/articles/how-a-throttle-body-works
and how to clean.
https://www.2carpros.com/articles/throttle-actuator-service
Please see images below for EGR valve (Exhaust Gas Recirculation valve) and air control flap (throttle body).
Please let us know how you get along.
Cheers, Boris
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Monday, March 29th, 2021 AT 1:12 AM