I took my fridge out of the van.  It would not light up.  Put it up on a table, connected a bbq gas bottle to it, and then it lighted up fine.  Took the burning chamber off, cleaned it out, checked the spark, put everything back, re-installed it back to the van and it won’t start up again.  If I blow compressed air to the tubes and air them out, it will start but it won’t stay lit even after 20 seconds holding the knob.  
Am I missing something?  Anyone knows this?
With ever lasting respect to the List,
Zoltan