Originally Posted by AndInConclusion
So I changed to e3.74 plugs to try them out. They look very impressive. I’ve driven about 100 miles on them and I did not feel any noticeable push or drop in performance. However, what I now have is an intermittent P2178 code that comes and goes. I’m looking at changing out the e3’s for something else. The originals have about 35,000 on them and look clean however the center electrode appears to be worn to the size of a pin head. Any recommendations on an alternative third choice to experiment?
You are much like me 8 years ago when I bought my car....looking for something better then what GM gave me. Trust me, as I was told, when I was a baby owner of a Kappa, the OE stuff like headlights(Soup), plugs, coils, hoses, etc are just fine until you add a different turbo. You're getting the p2178 because you have 1 of possibly 2 things that are an issue.... #1
(and probably the reason) is that you posted here and still put the e3 plugs in your car, stick with the ACDelco plug... or #2
, you have a HPFP that's leaking into the oil. This is BAD!! That's what I had. If it still happens after you put the OE plugs back into it, this is the issue. Trust me. I spent almost a year chasing this code. Stick with ACDelco plugs...as I stated, we've all learned here the others are gimmicky and cause issues...as you've now found out. And if you were the one posting on Facebook, and I said not to do it there.....DO NOT listen to the quacks on Facebook!!! Last week on Facebook, I was told by someone that had a "GM chip installed" that they were making 300whp with no mods. First, there is no "GM chip", it's a program in your ECM(but this is a complete other story)...You need to come here and talk to us if you want real answers. On Facebook there's a lot of mis-information, and most of the guys suppling it say that about these forums...which isn't true. These forums are legit in ANYTHING you want to do or ask. And if nobody here knows, we all put our thoughts into it.
Now this being said, if you were like me 8 years ago, you aren't going to listen about putting the ACDelco plugs back in and you're going to spend another $80 on different plugs, which are going to still cause issues. Then and only then will you say, "I should have listened to them"..... But I don't blame you, trial and error is the only way to know if what I'm saying is true. Just like I didn't believe Soup about my headlights...but after our little tiff online, I respect everything Soup (and this group) now tells me. Now go out there and spend $20 on 4 new ACDelco plugs instead of $80 on gimmicks. (At least you don't have to buy 16 plugs like I do for my Charger!!). Please let us know if the plugs fix the p2178 issue. I can give you instructions on the HPFP replacement if it doesn't.
EDIT: After reading this, I may have came off a little harsh...not trying to do that. Just trying to explain that I didn't believe a lot at first when people told me here what to do and not to do...it's human nature to not trust someone...especially a complete stranger online. Hope you get this sorted out....and stick with the OE plugs!!