van loses power heading up hill.
my 2000 mazda mpv will lose power and the rpms will drop and then
bounce back up intermittedly but espicailly while climbing hills. i can turn
the car off and let it sit for a minute and it will run fine but only for a while
then problem resumes. there is a noise that seemed like it was coming
from inside the gas tank that matched the revving sound i heard as the
rpms jump up and down while i was driving. any ideas