2002 buick regal vibration

The automatic idle control valve may have stopped working or the control module that operates it.

Does it have a vibration when idleing? If it has both, it is most likely the motor mounts. Either way it is a very easy thing to do. Make sure the car is in Park with the e-brake set. Pop the hood and have someone press the accelerator pedal, does the whole engine move (usually in a tilting motion)? If so the motor mounts may be bad.

Oil pressure warning check oil pump have the same problem on my 98 pump had low pressure

This sounds very similar to when the anti theft system fails. Read thru this link. It describes the same type of problems in a 96 regal

http://vatspasslockpasskeysecurityhelp.yolasite.com/

replace temp. sensor

If you have a bad wheel bearing then you will have a vibration that you will notice. If that is the case then you have a bad wheel bearing.

If you had a hole in your muffler it would be loud all the time and be even louder upon acceleration. You could check this first by getting under your car while its running and see if exhaust is coming out where it shouldn't be.

Subikid90

light switch is probably defective - more power is being used on hi-beams causing breakdown in switch - get replaced

Try this . Find an empty stretch of road . Accelerate teh vehicle to 30 mph ,while you switch the transmission INTO NEUTRAL, making sure there are no other vehicles in or behind your path. Listen and feel for your problem. Still feel it ? I would raise the vehicle in the air, and inspect ALL 4 TIRES for OUT OF ROUNDNESS. Cupping will not only cause a vibration, but also a noise. Hope this helps.

most likely it is not actually a misfire it is the overdrive/TCC solenoid kicking on and off, it is a common GM transmission issue

Have you ever replaced the fuel filter? sounds like that may be the problem, it is under the car on the drivers side.