How Quick Do Plugs Wear Out?

[noise]

I had a powerfc, avcr and fmic installed, plugs changed from iridium’s to coppers and my car tuned. r34 GTT btw.

Before I had this done I had misfiring problems at 4-5k rpm, after it was done there was no misfiring.

This was about one and a half months ago, and now I have started getting the misfiring again.

Have the plugs worn out so quickly?

I can’t think what else it would be.

[GunMetalR33]

What is the heat range of the plugs?

[Sydneykid]

I had a powerfc, avcr and fmic installed, plugs changed from iridium’s to coppers and my car tuned. r34 GTT btw.

Before I had this done I had misfiring problems at 4-5k rpm, after it was done there was no misfiring.

This was about one and a half months ago, and now I have started getting the misfiring again.

Have the plugs worn out so quickly?

I can’t think what else it would be.

<{POST_SNAPBACK}>

What were the plugs gapped to?

[Spook's_Skyline]

what should plugs be gapped to on an r33 running 12psi ?

[croat]

best all round gap is 0.8mm. If its not your plugs it will in most cases be your coil packs. I know this happens often on series 1's (the missfire).

Spook's skyline i would gap them to 0.8mm but if you have something different and its running fine i would not bother chaging it.

[RB30-POWER]

easy 40k from coppers.

you will have another problem, not the plugs.

did someone say coil packs.....?

[Spook's_Skyline]

im not sure what my problem is

car shudders (feels like a miss) when fully on it changing into second, its hte only time it does it;

im about to get the car serviced, so was just oging to my mechanic to check teh gaps;

[noise]

The plugs were gapped at .8 I think.

I will put a new set in and see how it goes.

[tommop]

any new info on this thread? did u fix the problem...

i just got my 100k service on my r32 its got exhaust, pod, fmic and 13psi and i just had iridium plugs put in...

it has a very slight miss on idle and is now misfiring and popping in 2nd gear when i boot it.

i immediatly thought it was the plug gap and havent checked it yet. so if someone has done this and it fixed it lemme know!

cheers

[nF]

i ran my car on 1.1mm iridiums at pretty much the same boost

used to get a slight miss, which got a bit worse when it got colder

i taped up the coil packs so they wouldn't arc, and it seemed to work

eventually i just replaced the coil packs with brand new splitfires, worked a treat after that

even ran ok pulling ~1bar at 1.1mm, though i'm planning on running more with my new turbo and shit

[_8OO5TED_]

i have a series 1 r33 and i had a slight miss after 4500-5000rpm through the gears and under full load.

i fitted some iridium plugs gapped to 0.8mm and it runs perfect now.

car only has a cat back exhaust and a pod. stock boost....

[noise]

I am changing my plugs tommorrow, will let you know if it fixes it.

The missfire is really bad. Goes from 4-5k all the way to redline.

This started within a week of taking my car to a workshop to have my dump pipe wrapped in heatape. They forgot to do it when I had all the original work done.

But they messed me around and were very rude and to top it off didnt even do the heat tape properly. They only did the bottom half of the dump which is not were you even need it.

I am paranoid thinking they did something to make my car missfire... Is this possible?

I just dont understand how I could have problems only 1 and a half months after new plugs were installed and the car was tuned.

Edited December 9, 2005 by noise

[_8OO5TED_]

if the plugs are gapped already, then i think coil packs

[Cubes]

I run NGK 6 coppers and leave them in for ~30,000km's.

The plugs that come out at 30,000km's work just as well as the new plugs.

$16.80 for 6 from motor traders, you can't go wrong.

I've had problems with copper plugs that have done 50,000km's. No major problems, starting became difficult.

Edited December 9, 2005 by Cubes

[noise]

Put in a new tank of fuel and all missfire problems seemed to have stopped????

new set of plugs are gapped at 0.8 and sitting on my kitchen table, they never got installed.

I just noticed splitfire coil packs have dropped in price on nengun, so might wait and see how it goes and get some if it keeps playing up.

I just hope it stays good. woooooo

Edited December 10, 2005 by noise

[noise]

seems it was a bad batch of fuel.

case closed.

[MANWHORE]

back in the days when I was in highschool, I ran a set of plugs for 30000ks.

they were in a hand me down shitbox car, and I was too cheap to buy new plugs. kept regapping them. at 30000ks, they were still only slightly almost as new.