I second SD Blue on the glow plugs. The glow plug relay is mounted on the drivers side inner wheel well. Pull the black cover off and check that the foil fuse is in good shape. You can also find a small, five pin plug. Pull it off of the relay and you can then test each glow plug individually with an OHM meter.

DO ALSO check your valve clearances. The turbo 5 cyl engines have a habit of the intake valves tightening up.

Let us know what you find.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.