My Isuzu rodeo does not pick fine, consumes more fuel, unless it steams for 10m

What is your question?

Engine turns off when I slow down or steering becomes strong when I slow down. If not allowed to steam for about ten minutes in the morning, it won't accelerate well, and will consume more fuel for the rest of the day.

What makes this problem better or worse?

When started in the morning without allowing the engine steam for about ten minutes

How long has your 2000 Isuzu Rodeo had this problem?

About a month now