1999 Subaru Legacy "hard start sitting runs rough" Questions

...hard to start. I cleaned the fuel injectors but had no luck. I am thinking it might be a fuel filter or oxigen sensor. O2 sensors do not cause any kind of starting problems, what can is a dirty upper ...

Hard start and rough idle. When the truck sits for a few days it is hard to start and idles rough. Also hesitates when hitting the throttle. Once it runs for a minute it goes away, but sometimes ...

...runs rough & hesitates My 94 escort occasionally gets a check engine light and starts running rough and hesitates. Not always at the same time. If I shut it off it is hard starting again unless it ...

...hard to start after sitting for short periods. After sitting overnight, it's starts easy. Not sure if the problem is related, but the truck starts to idle rough after idling ofr a minute. Runs good ...

...hard to get over 45 MPH. It only has 35,000 miles on it and has been sitting for several months in the garage..Anyone have any thoughts as to what this might be. ? I checked the vaccum hoses & they ...

...hard to start when cold or has been sitting for a few hours. When it does start it runs rough for a few minutes then is fine and runs great. if it contines to run fine dont mess with however if it ...

a cold start starts hard like its out of gas .as it starts it runs rough for a second and cleans right up .once it starts it starts good every time until it sits sounds like the fuel pump is going out

...Hard to start of 2006 dedicated gas ford SR Falcon.Hard to start of morning and when it does start runs rough for 30 to 40 sec's. When warm runs fine.sometimes if sitting for couple of hrs same thing ...

hard to start cold but once running is ok hard time getting started. fuel seems to be pumping in and need to crank it over many times to get going runs rough but once it gets going it is fine will ...

hard start-hot-1999 Chev 3500 Engine cranks a long time on warm starts after sitting 15 mins. Blows black smoke and runs rough. Turns on check engine light and sets codes-left bank rich-right bank ...