what sort of fuel system? carburettor or electronic injection?
I have 1998 a Lincoln town car with the same problem.. It idles rough when you start, then smooths out once it warms up and you give it gas. From what I am reading its either an oxygen sensor or you have vacume leak in one of your hoses by the manifold.
a longer cam shaft will make a car idle rough
Check fuel and spark
I have 200,+ miles on the car. I change the plugs and wires yet it runs rough at idle and runs smooth at crusing speed. What can i do?
it is in auto gear
The car will start but it will run rough and will probably overheat and cause worse problems.
No it does not take a gallon of gass to start a car. To start a car it doesn't use any gas.
I had the exact same problem. I own a 1984 Mazda RX-7 GSL-SE and what i did was bought a new starter. A new starter actually will start a flooded RX-7. But if you dont want a new starter then push the car and the car will start. now the rough start is related with the seals and oil. the oil is low or bad and/or you need new seals.
I get the gist of the question. Could be a plugged fuel filter or a plugged catalytic converter. Try the fuel filter first as it relatively cheap.
after start car smell gas why?
it depends on many things. if is an old car carburated and it is rough at idle, then mixture could be a factor.
vacuum leak