Working on a 93 5 cyl eurovan manual shift,  when warm it has no power,  a bunch of parts have already been replaced ,  is there an adjustment on the air intake temp sensor?  Idles smooth

Yours or a customers?
KC

I know the cat has been replace,  coolant temp sensor,  I need to check the cap and rotor

It was a bad ground on the block.  Had one on a 2013 gti that would randomly cut out and had misfire codes,  loose ground from the factory one the frame horn behind the air pump

Yes,  after working with dubtech I not only hate it when a bad ground bites me in the a$$,  I also think of him and always "check the grounds",  I was about to replace an abs module on a car a couple months ago,  check power,  put the dso scope and watch the can bus wires,  thought I had a bad module but ended up being a ground in the a pillar under the carpet