I think for stock plugs, you can leave them alone until 100k miles. If you've added some sort of FI to your car, it should be done more often.

 

hey guys i just installed my new spark plugs i used ngk PLFR5A - 11 plugs. and i didnt move the plenum or intake duct. i just got to the coil packs from the side. anyways when i start the car now i get a rough idle. almost like the cars camming? the plugs are pre gapped? but ima be checking them again to make sure. anyone have any advice on this problem thanks?

 

i made a mistake when installing the plugs on the intake side i didnt plug the harness together right with the right coil pack.
On the intake side the last two harnesses for the coil pack i had switched.
Make sure that the middle harness goes to the coil pack in the rear and the last last extention goes to the middle
It sounds weird but it is so, that the wires dont get bunched up.....(Nissan made it look clean)

 

haha yep thats what it was i figured it out yesterday. doh.. hehe thanks anyways man

 

Now what kind of plugs are good. I've heard alot about NGK Iridium. I went to autozone and they had 2 kinds, the NGK iridium or autolite double platinum. How are the autolite plugs? does anyone know?

 

Just get copper: NKG LFR5A-11. They don't last as long, but they do conduct a better spark. And they're less expensive.

 

NGK.

Depending on your set up, a colder spark plug may be better. Again depending on your set up, a hotter or the regular (recommended) may be better.

If you're N/A and will drive in all normal conditions, the recommended spark plug is your best bet. NGK seems to be the popular brand and their prices are good. Copper ones do conduct a better spark, but iridium and platinums are also good and will last you a lot longer than copper ones.

 

i thought jeremy tibbs said copper was better for the juice

 

Yeah, that's what he told me as well.

 

Copper is better. I was just saying that Iridiums will last longer. I have copper plugs in mine.

 

Ah, I only read the last post lol. I agree.

 

Come on, guys. My Z's bottle-fed. Do you really think I wouldn't know that little fact? You give me too little credit.

 

ok i have a question, generally on spark plugs

just yesterday, i was in my car and i turned the key and the car didnt turn on. you can hear it turning, but it never ignited. Is the spark plug the only possible reason for this? Or might something else be the cause of this? If the spark plug is the only possible reason, then im gonna change mine. Thanks alot

 

anybody tried using the pulstar plasma plugs on their z yet?

 

The dealer said the stock plugs were good for 100k miles.

So does the coil assembly have to be replaced at certain intervals?

 

The coils get replaced when they die. Theres no schedule for them.

 

I wanted to know if anyone has used the e3 sparkplugs? or opinion on them, brother told me to get them because he saw on horsepower tv that it helps car. I have my car with bolts on and I just want ngk iridiums.

 

ngk iridium is a much better plug, ive never had a problem with them..buddy of mine just put the e3 plugs in his turbo pt cruiser and burned one up within a few months, melted it i guess from what i heard

 

anyone every figure out the idle thing? the idle is def different now, feels like a misfire but i have no cel yet, so idk. help?

 

no idea what idle thing u are talking about here..but sounds like u did your own plugs and didnt clip all the clips back together right or mixed them up or just didnt do it correctly, pull and do again correct