changing spark plugs and wires
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,034
Likes: 1
2005 Pontiac GTO 6.0 LS2 - Blue
Spark plugs are good until around 100k miles, or at least the NGK's, but I suggest changing 80-90k. Not exactly sure on the Bosch, but if they are the original plugs, being you own a 2002, they should be NGK. The wires there is no estimate on mileage, but a lot of us have switched to the Magnecor KV-85 performance wires.
Last edited by gt4awd; Mar 3, 2010 at 02:10 AM.
MBWorld Fanatic!
Joined: Sep 2008
Posts: 1,034
Likes: 1
2005 Pontiac GTO 6.0 LS2 - Blue
I've been thinking about switching back to OE plugs to see if it solves my rough idle issue... What experience did you have with Magnecor? Please go into detail about what happened. Thanks!
Last edited by gt4awd; Mar 3, 2010 at 04:03 AM.
MBWorld Fanatic!
Joined: Dec 2007
Posts: 5,034
Likes: 6
From: Corona, CA
03 g35 coupe...........02 c32 Sold
i would check your wires again. The misfires are caused when the wire slowly starts to slip out, since the wire is slightly larger then oem. Some members have crimped the end to make it fit better.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Super Member
Joined: Dec 2007
Posts: 587
Likes: 13
From: The Windy City
'02 C32, '10 135i M-Sport, '10 E63, '17 GLE63S
I've got the opposite luck of everybody else - a bunch of my OEM wires failed around 65K and since replacing them with Mags (30K miles on them almost), I've only had one "loose wire" issue that I was able to fix by hand in a dark parking lot.
As per the rough idle, there's definitely a slight difference from OEM, but to anybody who notices I just pull the usual "It's a performance thing..." excuse
As per the rough idle, there's definitely a slight difference from OEM, but to anybody who notices I just pull the usual "It's a performance thing..." excuse
Super Member
Joined: Jun 2008
Posts: 855
Likes: 1
2010 C63
I just changed my plugs at 100,000 miles. The old plugs looked fine, which is shocking as they were stock and I drive it like I stole it! The Plug wires were all still 100% perfect so all I did to those was some dielectric grease inside the boots and reused them.
Did not notice an ounce of benefit from changing the plugs, so I have to give kudos to MB for using a good quality plug to begin with.
My next job will be to send the fuel injectors out for balancing/cleaning
Did not notice an ounce of benefit from changing the plugs, so I have to give kudos to MB for using a good quality plug to begin with.
My next job will be to send the fuel injectors out for balancing/cleaning
Senior Member
Joined: Oct 2007
Posts: 369
Likes: 17
From: SO CAL
AMG
by the way if you do the work yourself it does help if you while you are trying to pull the wires, you keep them straight because they are A PITA other wise it took me an hour to get the sires off the first time and about 20 mins after i fould out the right way to pull them out
