Spark Plug Comparison
Super Member
Joined: Mar 2017
Posts: 770
Likes: 71
From: Utah
2003 Mercedes E55 AMG
My daily commute is like 1.5 miles (5min in traffick) from home to work and back. I don't really get all the way up to op temp and I think this contributes to my plugs fouling a little. The idle for me really smooths up when I've been beating on it, until then its a bit rough. It could be my injectors though? I am putting a new set of 1 step colders in. I have one bank done last night the other bank today and I'll let you guys know if its smoother from the change. Everything else, MAP, IAT, o2, coil packs and wires are all replaced within the last couple of years. My thought is if you are on stock you will have problems with plugs fouling up and slightly rougher idle. NGK recommend going to one sop colder when increasing power by 75-150 hp if I remember correctly.
You must be fast to get all 16 plugs done in an hour! I spent a good hour getting one side done, but I didn't copper grease the plugs last time so I have to turn it like 7 times before it starts loosening up and turning easily :P. Also I don't have a good extension length and have to work around with too short and too long
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You must be fast to get all 16 plugs done in an hour! I spent a good hour getting one side done, but I didn't copper grease the plugs last time so I have to turn it like 7 times before it starts loosening up and turning easily :P. Also I don't have a good extension length and have to work around with too short and too long
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Super Member
Joined: Nov 2017
Posts: 927
Likes: 165
From: Virginia
N/A
Good question.
https://www.toyotanation.com/forum/1...iridium-s.html
https://www.bobistheoilguy.com/forum...s_Laser_Iridiu
https://www.toyotanation.com/forum/1...iridium-s.html
https://www.bobistheoilguy.com/forum...s_Laser_Iridiu
Last edited by Fountain35; May 27, 2019 at 02:11 AM.
Super Member
Joined: Jan 2017
Posts: 860
Likes: 80
From: Christchurch, New Zealand
CLS55
Just changed my 7s to another set of 7s. 40k km and 4 years the idle was fu*kd back to silky smooth yeah baby. Kinda feel like the plugs didn't last long as they should. Ah well looks like I'll replace them every 2 year
Super Member
Joined: Nov 2017
Posts: 927
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From: Virginia
N/A
MBWorld Fanatic!
Joined: Aug 2011
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From: New Zealand
