kenwc21,

Is your car a turbodiesel? The '82-'85 US spec 300D's were tubodiesels. However, there are a few euro '77-'85 (non turbos) on the road. If yours is a non turbo, it probably does not have this fitting. The banjo fitting I referred to was the one that is threaded into the back of the intake manifold, you will need a 12mm wrench to loosen it. It is a hollow bolt that allows pressure from the intake to get to a valve (follow the line to the valve). The valve sends the boost signal to the fuel pump for more fuel and also sends a signal of some sort to the transmission. The turbo's have an exhaust gas recycling valve. Over time, soot from the egr will plug the bore of the bolt and eventually restrict boost from reaching the fuel pump. You can clean it with wd40 or brake parts cleaner.

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2001 Dodge Ram 2500 Cummins Turbo Diesel - 4x4, auto, 3.54 gears, long bed
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'92 300D 2.5 Turbodiesel - sold
'83 300D Turbodiesel - 4 speed manual/2.88 diff - sold
'87 300D Turbodiesel - sold
'82 300D Turbodiesel - sold