1998 Buick LeSabre "rough running" Questions

car idles rough in park also runs rough in overdrive car idles rough also runs rough in overdrive. Problem started after a oil change???? weird..Catalyst was stopped up had to punch a hole in it to ...

...runs rough when warm when the car is cold it runs fine. Once it gets warm it starts running rough/missing. replaced coil pack and fuel pump. what could it be? Buick 97 lesabre, runs rough when ...

...running rough and the I drove it around for a while and it was okay for several weeks and then started running rough again and staying that way. First I would change where I buy gas.And perform a tun ...

running rough Its missing I also replaced both spark plugs and wires... Am I over or under looking something? I also replaced the trans the week before this issue.... I really need help Im getting gas

1996 buick LeSabre runs rough at 50 mph The engine loses power and runs rough at 45 to 50 mph. Brlow 45 mph the car runs great. What can be the possible problem? Sounds like low fuel pressure. i.e. ...

95 buick lesabre runs fine until it gets wet and then sounds rough and hesitates when it is wet or when it is damp and raining the car runs rough and hesitates between 45 and 55mph. When it is dry out

92 Buick LaSabre, runs really rough. Sounds like 92 Buick LaSabre, runs really rough. Sounds like it is missing, especially when driving up a long hill. check the fuel pump

...(not firing). The engine is running with one cylinder out causing the rough idle. The faster the car goes the less perceptible the misfire is. That is why at 30mph the car seems to run

...running rough after i start driving it for a while and also runs rough while just in idle. The service engine light started blinking and many abs light also stays on. Please help! ! So have the ...

...why is it running so rough? I have changed the gas filter I have used a computer to look for codes and didn't find anything check your ignition system. A good quality HEI tester is quite ...