hi everybody,

since its gotten cold outside, when i go to start my car in the
morning, the car will start and then will begin to idle like its going
to accelerate but then it doesnt, it usually idles from about 3rpm to
heat up and then i push on the gas and it goes back to 1rpm which is
normal, but within the last month or so, it just stays at 1 or below
like its trying to cut off and makes this noise like uh uh uh uh uh
and its almost like its sputtering or something then its sorta like
greyish black smoke coming out of the tail pipe. the only way i can
get it to accelerate and be normal is to hold my foot down on the
accelerator and it works then but after that its a gassy smell, so i
guess i just need to know whats wrong and how it can be fixed

thankyou