Check your gas tank vent is not clogged. Loosen gas cap and hopefully no vaccum

Wow.this is turning into a quite a "How to troubleshoot anything thread". Good luck skelly. Hope you find out what it is. Your putting so much work into this. Did u run grease on your last trip? I m guessing your not until u get this thing straight. Good idea. Thanks for Keeping us posted.

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius