Hey guys was wondering if messing with the ground electrode by gapping it up or down can mess it up and trigger the SES (Service Engine Soon) light cuz mine came on after I was checking my plugs n regapping them. Everything was cherry before that though. Think I should buy new OEM plugs or is there a way to fix this? It sometime misfires -.- Any advice or comments would be highly appreciated, Thanks :-p

 

If you're misfiring from improperly gapped plugs, yeah you might get a CEL. What are they gapped to currently? Sounds like it needs to be a bit tighter.

 

i gapped mines to .024... at first i tried gapping it to like .040 just to c how it runs n it ran like sh*t lol.. i'm thinking that wen i gapped it down to .024 i might've messed the ground electrode n now it's not functioning properly... but i never knew spark plugs can trigger the SES light tho...

 

did you check what is the code for ses light?

 

no not yet.. i gotta take it to the dealer n hav them check the code since idk how... :-/ there wasn't any SES light until after i messed around w/the plugs so i'm assuming it's the plugs... but yea i'll hav the dealer check the code

 

You can take it to any Autozone and they'll check the code out for you. You can clear it by just resetting the ECU. Many of us aren't too fond of dealerships.

 

I didn't read your location... this may be silly, but I'm guessing you don't have Autozones in Hawaii? In that case, just go to the dealer.

 

there are autozones here in hawaii but i didnt think they'd hav a datalogger for evos.. mostly only domestics.. but yea ill try one of the autozones. btw u think i should make the gap tighter to like .020 n c how it goes? wat's ur plugs gapped to?

 

I have the stock NGK ILFR7H plugs (about $100 if you buy from the dealer), and they should be around .024. I need to check them soon for carbon and I could confirm that gap. Most stock ones are right around that range.

Try .022.

 

HEHE

Just upgrade to iridium supposedly your not supposed to gap these.

 

I'd check them before I put them in. Just be careful not to damage them.

 

Sorry to bring a thread from the dead. I had SES and stuttering issues, replaced the plugs and gapped to .20. No issues whatsoever.

My history is with WRXes and I must say, once I felt the faint stuttering and noticed the SES, I instantly had the suspicion that it was a blown motor via gasket or who knows.

Gap properly and hopefully this will be the solution to your problems.

-Nick

 

by the way NGK iridiums are gapped to large you may misfire if not gapped....