andrewjtx - I don't want to step on anyone's toes here but I'm not really talking about alt fuels here. My vehicle does/did run some alt fuel but I'm currently looking for assistance in determining if my IP or LP is faulty. Just because I have altered the vehicle a bit does that disqualify me from asking questions here? Just asking that in a friendly way.

funola- The stock LP does not seem to be used when I'm on the "diesel" side with the electric pump. The mechanical pump pumps from the original tank which has had WVO in it as well as biodiesel. I'll try to make a diagram later today.

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"Gerwalt" 1984 - 300TD