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Colt 1.5 D-id Engine Losing Power

6.3K views 1 reply 2 participants last post by  Tingy4  
Have you had a look at or changed your fuel filters? Diesels will do this, they starve for fuel under the higher load when travelling at speed due to the filters being blocked. Once you turn it off they settle down and run ok again until a high load or high requirement for fuel happens again.