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Topic Review (Newest First)
04-16-2014 03:12 PM
mac.mogul I gap my 103 to 0.055 and haven't had a single issue.
04-16-2014 02:06 PM
1turbofocus If the 104 worked good the 103 would of as well , there is no way that 1 heat range would cause any driveability issues you you would see or feal

Colder plug will just not keep the oil / carbon burned off and will need replacing sooner , you had other issues somewhere

04-16-2014 12:37 PM
Originally Posted by mac.mogul View Post
Did you gap the 103s before you put them in?

Yes. To .050 inches. The shop manual gives an acceptable range of .048 to .053 for the 2008-2009
04-16-2014 12:36 PM
mac.mogul Did you gap the 103s before you put them in?
04-16-2014 12:07 PM
Ryokuro Just gonna throw my experience into the mix here as well.

Tried the Autolite 103s and had issues with bogging under WOT from a complete stop. Almost sounded like I was flooding the cylinders with fuel, like it was too rich. The only mods to the engine are the FSWerks CAI and race exhaust. I didn't see them as being likely culprits.

Swapped the OE plugs back in for the winter and replaced them with Autolite 104s several weeks ago. So far no issues with WOT from a stop and power is a'plenty.

The 104s came just in time as well. Here's what the OE's looked like at roughly 64k miles.

04-16-2014 09:03 AM
Originally Posted by don627 View Post
I would just use what works. I think Autolites are fine spark plugs should be no problem. I would be careful with seafoam I'm not a big fan of that stuff. I think it does more harm than good. If you read the ingredients you will see what I mean. Just my opinion, there are lots of people on here that swear by it but, I'm not one of them.

Seafoam is the Greatest!! I put a can of Seafoam in my tank every 3-5 months depending on how much I drive. I notice a big improvement every time I use it. I wouldn't over use it tho. That can be bad for your engine and fuel system.
04-11-2014 02:51 PM
ZippyZX3 Bosch multi ground electrode plugs only work on NON DIS engines.
04-06-2014 04:45 PM
SlickWilly I run 104's without any issues. Been about 10K now and about 20 shots of nitrous.
04-06-2014 04:32 PM
wazzup242 I been running 103s since about 30k, just replaced them at 55k, the car runs great, I remember the day i switched to them, i dont know if it made a difference on the high rpm part, but It seems a little better on the low end. I have a manual so i can notice it a bit when taking off
04-03-2014 01:18 PM
benoit230 I have 104s in... the guy at FSWerks said I should go with 104s instead of 103s not sure why. Perhaps because I'm not modded heavily?

The 104s definitely made a difference but it's not a surprise from what the old one's looked like when I took them out on Tuesday.
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