ok when i start my car in tha cold it is hard 2 start i have 2 increase my gas several times if i dont it will just die down and my steering wheel shakes when it starts up and when i drive slow 2 and my muffler it hardley spits out tha air and stuff any help cus i kinda just bout it and i dont know what 2 check first might go get a tune up that is first for me