98 Rover Cold Start

At home, my Rover really cranks in order to start.  Takes anywhere from 5-10 seconds, or it just won't start.  Sometimes it starts and coughs for a while.  When it does get running, it's very smoothe.  Of course, when I take it to the shop, it starts right up.

I live in the Denver area, and the shop is at altitude 5400' and my house is at 9000'.  Imagine that must make a difference somehow, but I'm at a loss.

Any ideas?

Thanks,

Fozzy

check fuel pressure, i think its leaking down overnight.