<mmdir2005@yahoo.com> wrote in message news:1126422219.657749.278600@f14g2000cwb.googlegr oups.com...

> My car does not run well on uphill driving. Sometimes it climbs fine.
> Sometimes
> it doesn't. I think it's has to do with humidity of atmosphere. The air
> going into
> engine is not constant. Some sea level it's ok and other sea level the
> air is not going
> well so the engine hesitate. I don't know what to do about.

Atmospheric pressure sensor. Fuel delivery actually changes at
different altitude. This is a reliable solid state device.