Holy Oil Change Batman!!
So I had similar problems that I am reading in threads here.
Shaking truck, power loss, low of fuel mileage and hard to start once warm on long trips.
I called my local Diesel hot rod shop in the Seattle area and talked to the service manager. He listened to all my problems and gave me a surprising diagnosis. He said I need an oil change!!
He told me how important the oil in these diesel motors is and how it doubles as hydraulic fluid for the injectors. He said that the special anti-foaming additives in diesel oil do break down and once the oil starts foaming it will cause all of these symptoms. He also said that when the oil does go bad and symptoms start you have change the oil twice because the engine holds about a gallon of oil in the heads and turbo and the oil still in the engine can contaminate the new oil.
So I did just that. I drained the bad oil and dumped the oil out of the filter and filled it up with new oil. Then I went for about a fifteen minute drive and then drained the oil again and installed a new filter.
I must say the truck is running better and better each day. The power is back and I'm getting a ton of extra miles on my fill ups. Also the shaking engine at idle is so faint its easy to ignore and it might even be how they all run.
So before you head to the shop for testing make sure you change the oil, and if your not sure when the oil was changed last (like mine) change it twice.
Last edited by GreMonte; 05-23-2012 at 05:08 PM.
Reason: picky nerds