2001 LeSabre uneven idling

Good day, gents!

When car is in park, I hear that the engine is not working smoothly, the same thing to a lesser degree happens when I've stopped on a red light. The cars has 126K and the the last time the plugs were changed at 93K, about two years ago.

Thanks in advance.

How about the wires, were they changed when the plugs were replaced? What kind of plugs were installed? (brand & type if you know). When was the last fuel filter change?

HotZ28, the wires were changed two years ago too. Unfortunately, I don't know the make or the type of the installed plugs. Since it's not going to hurt, I was thinking for a DIY project to replace the plugs and the wires myself, maybe that'll help the issue out. Since this is my first time replacing plugs and wires on a 2001 LeSabre, can someone recommend a good brand for both. Thanks in advance.

Well you can go with GM original plugs and wires. I read somewhere here that Buicks should have original AC plugs, or they run like crap. but have since learned that is not true in my case. There was no way in the world I could get at the back plugs, so I took my 2000 LeSabre to a small garage I use up the road. He put in NGK Platinum plugs and NGK wires. There have been no problems, and while it is now my wife's car, on those occasions when I drive it, it seems to have more power than it ever did. Might just be me but the NGKs are great.

Do I have to change the ignition coil when changing the plugs and the wires? If the coil has to be changed, is it hard to do?

Thanks in advance

The answer is: No the ignition coil does not need to be replaced when changing plugs. Unless of course they are damaged in some way.

BTW changing the plugs on your 2001 will probably be fairly easy since you just changed them 2 years ago.

the hardest part will be the rear plugs but if you look at the forum messages you will see that a couple of us with the same year just changed our plugs. It was stated that the easiest way to change the rear plugs was to go over top of the engine and reach the plugs.

My spark plug wires were on very (extremely) tight but if you changed yours two years ago they hopefully wont be on as tight.

And as Hotz28 mentioned on one of the posts use gloves to pull the rear plugs otherwise you will be hurting your hands.

I wish you the best.

Rasp, thank you very much for the instructions. Which plugs and wires did you use? I tried to find NGK's like polarzak suggested, spark plugs is not a problem but it's impossible to find NGK wires for Lesabre - I searched the whole internet :(

The current recommended replacement spark plug for your engine is the AC Delco 41-101 Iridium which is made by NGK for GM. Warrantied for 100K miles. Also, you can use the NGK TR55IX Iridium which are available anyplace. The Autolite double platinum APP606 also work like a champ.

IMO the best ignition wire to use are the AC Delco Premium Silicone 7mm wires.

BNaylor, thank you for the detailed answer. :)

I used NGK platnum (spelling???) and I used Bosch premium wire set. I don't know if my combination is the best but my car's engine is running smooth enough for the girl I go with.