Join Date: Jun 2009
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I just went through the same thing with my 01 550. Get this
It took forever to throw a check engine light. when it finally did, it felt like crap, and wouldn't pull 40 km/h downhill with a stiff breeze. A budgie fart in front could have stopped it.
So, I limped it home, and got under the hood, by wiggling the wires to the valve cover connector on the left bank, I was able to make the problem come and go at will.
Today, I pulled the left cover, and the connector had come loose. So, I spent the time and money, got new glow plugs ( it needed them ) and new gaskets and UVCH. Did the 50 cent mod to them while I was at it, and its all sunshine and smiles again. ( for 24 feet or 24 hours, whichever comes first. such is the nature of the beast )
Just food for thought.