so WTF happened to my spark plugs? they're only 4 months old!

[Losiracer2]

I have known too many people that had issues with it.

Also, keep in mind that most suppliers build parts to their customer's specs. That means that the plugs carried at Autozone may not be exactly the same as those carried by Honda, even though they both fit the car. A place like Autozone is more likely to request a lower quality part simply so they can sell it cheaper. OEM rubber seals are a good example. Just because the company supplies both Hyundai and Honda, does not mean that the two seals are identical.

hmm, okay gonna fill up w/ chevron/QT/Mobil from now on.

[AD5OS]

Higher Octane Gas = lower cylinder temps! Thats why when we would race we used 117+ octane.... we could get more oxygen into the engine to burn cooler and hence more RPMs...

I would guess they were spaced too wide and the outside electrode got too hot because of the stronger spark between electrodes. I always gap mine to the minimum amount I think it was .039... cause they tend to widen over time.

I have seen spark plugs like this on lawn mowers when the gap is too wide btw!

[Losiracer2]

Higher Octane Gas = lower cylinder temps! Thats why when we would race we used 117+ octane.... we could get more oxygen into the engine to burn cooler and hence more RPMs...

I would guess they were spaced too wide and the outside electrode got too hot because of the stronger spark between electrodes. I always gap mine to the minimum amount I think it was .039... cause they tend to widen over time.

I have seen spark plugs like this on lawn mowers when the gap is too wide btw!

hmmm, that makes sense, but isn't the optimum oct. 87 for our cars? w/ the F22 engine?

[F22HB]

How does the car idle? With good plugs.

[cvc7chris]

damn that spark plug is gone

but yeah i use 89 on my cars most of the time

[Losiracer2]

How does the car idle? With good plugs.

it idles perfect, right at 750-800 depending on if the A/C's on or not, right NOW. But before, w/ those other NGK's, only just yesterday it started acting up like that and eventually, broke i guess, it just all of a sudden started misfiring and bogging down the RPMs at like 40mph+...going on the freeway, forget it wouldn't even go past 3K rpms.

[owequitit]

hmmm, that makes sense, but isn't the optimum oct. 87 for our cars? w/ the F22 engine?

Under most conditions our cars are tuned to run on 87 octane. It is really to save the owner money. The problem is that our engines have no knock sensor, and over time, we can get carbon build up etc. This makes it more likely that you are going to encounter detonation in extremely high temps such as here in the summertime. Hot intake air temps don't help either, such as when your CAI gets heatsoaked while crawling along in traffic.

P.S. I am trying to figure out when I can get down there to help you.

[IBCNYA]

looks like your running SUPER HOT / LEAN

X2 on this..while lean is fast, lean is hotter and stuff breaks easier when induced to extreme temps. You arent getting a proper amount of fuel to your engine. Maybe due to low fuel pressure, clogged injectors. Youre not boosted are you?

[Losiracer2]

X2 on this..while lean is fast, lean is hotter and stuff breaks easier when induced to extreme temps. You arent getting a proper amount of fuel to your engine. Maybe due to low fuel pressure, clogged injectors. Youre not boosted are you?

nope not boosted. I was thinking about getting that Bisimoto phenolic IM gasket since its only 50 bucks it'll help reduce the temps hopefully. But as for injectors, how would one diagnose them? would the only way to inspect them be to remove them from the fuel rail? I've got 171K so idk if they're spent yet.

[wed3k]

vacuum guage will tell you everything.

[Losiracer2]

Bump for a quick ? Do you think a bad or going bad O2 sensor could cause the plugs to get so hot? Should I consider replacing it if I'm experiencing this? I don't currently have a check engine light or anything like that but I havn't replaced the O2 since I bought the car 4 yrs ago @ 118K miles....I've got 171 now.

[Night Wolf]

damn your problably running too rich.

[Losiracer2]

damn your problably running too rich.

most ppl said too lean/too hot?

[Night Wolf]

most ppl said too lean/too hot?

well I was thinking maybe theres something on the engine thats telling your ECU/F-injectors to put more gas. I mean wouldnt that cause things in combustion camber to heat up & melt?

[ExplodingCake]

Lean it is. I would highly suggest checking your EGR as well.