C 250 TURBO DIESEL LACK OF POWER "98 auto"

THE CAR WILL RUN FINE BUT THE NEXT TIME YOU USE IT THERE IS A LOSS OF POWER AND STUGGLES TO REV TO 2500 NO LIGHTS COME ON ON THE DASH AND I HAVE HAD IT
ON DIAOGNOSTICS SEVERAL TIMES AND IT SHOWS NO FAULTS AND IT IS VERY HEAVY ON FUEL CAN ANY BODY HELP I AM DESPERATE
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Since you're desperate I'll venture a hypothetical - and that's all it is for the USA doesn't get these engines.
Modern diesels are using many of the devices found on gas engines - mass air sensor, crank position sensor etc. for control inputs. One of them has become intermittent.
The shop finds no repair codes?
Is the engine's operating temperature in the "normal" range or low?
Poor power and excessive fuel use suggests very much retarded ignition (injection timing here). (Crank position sensor fault.)
Or it might be that the computer senses a "cold" engine and so runs it in a "warm-up" mode (if that's what it's supposed to do, I don't know).
If this engine has an intake air flap to control the air volume like a gas engine that could be restricted, choking the motor - ah more speculation, its just endless!
I'd better stop or you'll be even more desperate!
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
wizzer wrote:

warm-up cycle. Anyway 2500rpm in 5th on this model is above legal limit in UK. Once warm performance is more than adequate (goes like a 'a bat out of hell'). What do you call heavy on fuel ? I get 37.5 mpg around town 45 mpg on a long run. Mine is an Estate so a bit heavier than the sedan or saloon model.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.