Thanks for your responce,,

Rattel noises in diesels(or so it has been in my earlier diesel engines.) seems to be more noticeable when engine is below normal operating temperature Why time intervals change however I have no good idea of.. However you should have the codes read. I thought my truck ran just fine, but after beeing in the workshop yesterday they found that one injector was malfunctioning as well as a rail pressure valve or something like that. (Total cost abot $1200) My car has about 40000 miles on the meter and i think it's strange that the injectors are staring to lay off.

Anyone else that have similar experinces?