And ngk is not stock plug, scrap ngk and go to stock acdelco. Bet u ur car will run fine then

 

Car ran great for a year with one step colder plugs, it was tuned for it Its the engine bay cleaning that fucked everything up

 

Check it out : https://www.cobaltss.net/forums/prob...swered-223223/

 

trust us, the lnf likes the stock plugs much better. There are zfr cobalts running stock plugs, which have a much higher heat load than a ko4 can put on an engine. Until you see the actual issues that occur with running to hot of a plug you don't need to decrease, decreasing can actually make your car run worse.

 

Yeah I can't recall why I went one step colder. Must have been a mistake on my side. I heard the same and will keep running the stockers from now on

 

that's awesome that u posted a link for spark plugs for an lsj, unfortunately this is the lnf we are talking about, totally different engine.

 

or so u thought. mine ran good to, or so I though, then I listened closer and it sounded like it was gurgling, people asked what was wrong with it lol.

 

It covers both the LSJ and LNF man

 

doesn't matter anyway, that thread is old, all the lnf guys know better now. that's why we all say stick with stock