1997 Buick Lesabre engine stumbles

If the vehicle is due for a tune up, it won't hurt to do it. However, 99% of the time, an engine misfire due to a coil, plug, wire... will set the check engine light which will indicate which cylinder is misfiring. I guess what I am saying is that I can't say for sure that is going to take care of the problem.

Have you checked fuel pump pressure? Have you checked for engine vacuum leaks?

Yea theres no check engine light on at all. But I just check the plugs and wires And when I pushed on the the #5 plug and wire on the engine and not the coil pack the engine stumbling stops so I believe its may be the plug because I changed that wire.

Pushing on the wire won't affect the plug. The problem is in the wire. Do you have one to switch it with? If so, try that and let me know what happens.

Yea I changed the wire but it still does the same thing

So, when you push on the plug wire, it runs better, but the plug wire isn't the problem?

It was the wire, it was resting on the o2 sensor. Thank you for all the advise.

Glad you found the issue. Take care and let us know if you have questions in the future.

Have a great Christmas,

Joe

Thank you and you have a beautiful holidays