ya i think im gonna change back to stock tomorrow, im getting a little knock and more missfire at idle with the one step colder ones.

i switched back to stock plugs, the 6509's were giving me to much knock and misfireing at idle. i need new stock ones, but the ones i put in had about 16kmiles on them and the car seems to run better now that i put them back in.

 

I changed mine today at 16,100miles

I put the 3787's in and went on a drive and it felt better and it felt like the power came on quicker....idk if its more power or just a smother power.

I bought mine on amazon for 41$ and some change shipped to my house took 4 days!

I am happy with this 41$ tune up

 

I have yet to put mine in yet cuz i'm saving them for the s/c build, but i got the NGK Part# LFR6A-11

 

I learned a lesson on spark plugs. Some people ran aftermarkets fine and for a while I did too.

I was running Autolites (sorry if I spelled that wrong). I'd say they were in for 8-12k miles. I'm not sure. I am tuned. A mild tune as I am BSR PPC tuned. There was a couple days that I ran the car pretty damn hard. Then I started getting a P301 or P0301... whatever the code is for "Misfire cyl 1". It was running like poopy doo.... It kept stumbling and **** any time I was cruising around 2k rpm. So naturally I thought I was a broken piston victim. On a whim I changed back to AC Delco plugs. The problem went away. Another member stated that they also did that and then a week later it came back.

I'm on two weeks now with no issues since switching back to stock.

So the moral of the boring story is.... I'd just stick with the damn stockers unless they start failing and not meeting the needs of the engine.

 

ya i just put my stock back in and my car just runs much better.

 

gives me enough of an idea. Just took out my Denso's TT and went back to stock. Because I believed I was running kind of slow, but its best if I get my investment out of my stocks before I switch to NGK's.