Posted: Feb 01 2013 at 6:56pm | IP Logged

At idle, the demand for fuel is low.  You can check the pressure (I am NO expert on this) but the pump is in the tank with its own "filter" so if you need to work on the pump or replace it, out comes the tank.  In my opinion, because of the fire danger, I'd let a dealer or garage do that if it turns out to be the case.  The fact that hills and traffic are a problem makes me suspicious of the engine not getting enough fuel.

Remeber, it is either fuel (not enough as it revs) or spark (bad coil packs that are sennsitive to heat, for example) or not enough or too much air (like a massive vacuum leak).