I have an 82 300D-T 617. When I fire her up, I hear a vibrating sound. Like a broken oogah horn. The egr has been leaking....could this be causing a lack of manifold pressure while starting? The motor has 88k miles.

Thanks for your input- Matt

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1982 300DT *4-speed*// proper 617 donor for conversion // W126 big brakes // front wagon swaybar // european lights & bumpers // rear headrests // lumbar support // warning triangle // overdrive water pump pulley & 9 blade fan // Too many more to list Dark blue/ Palomino.

1983 300D euro no longer a 4 speed. . swap/parts carr