Help is needed desperately

It's called DEF here in the states. Not sure if it was common here in 2008 or not.

 

Call around for engine performance shops that have a dyno. Drop off truck, tell them to fix the issue, pay bill, go on with hauling freight for profit. You can’t serve a customer without good equipment. If you don’t serve a customer, what’s the point of it all?

 

Would help to know what engine, what transmission, what rear end ratio, how heavy you are "loaded"?

 

Well just my experience if a dealership tells you they can get to it tomorrow that’s not bad.Don’t think you will find anybody who will stop what they’re doing and get you right away.Good luck

 

Doesn’t have to be a dealer. The engine manufacturer can do a diagnostic also.

 

People here won't be able to help, unless...

WE KNOW WHAT ENGINE IS IN THE TRUCK.

You haven't answered that question in three pages, so until you do, everyone is guessing and giving you the wrong answer.

 

Detroit 60 series 14L sputtering in high gears and throws out puff of black smoke