Hi, I’m new in this forum and have a problem with my 98 Deville Northstar. (I already reed allot in this forum, but didn’t find my same problem)

engine will start just fine, and runs for half an hour.
Sometimes it will stall and won’t start anymore till engine temp drops.
Or when I stop the engine myself it also won’t start and need to wait till temp drops.

FPR is checked
motor cranks
No Codes
Fuelpump will do nothing when engine is hot, only when it’s cold.
oilpressure ok (when it runs)
all Relays are checked or put new in it.

Does anyone have an idea why the fuelpump only works when it has a low temperature?

Or what is holding my fuelpump from working?

Gr from Holland