I've done a bit of looking around seems that its a .39 to.43 if im wrong on this measurement some one let me know I was thinking of doing .40 so my coils dont have to work as hard any input would be grateful.

I wish the how spark plug guide mentioned the correct gap specifications maybe if a forum mod see this post or some one makes a guide with the correct measurements for future people would be much appreciated.

I have a couple days to make sure I have the right specs thanks again every one.

 

Please see FSM ...

 

If you buy the recommended spark plug, it comes pre-gapped at .040. That is within the specs but check the gap before installing.

 

I thought the pre gap was .44?

 

It's 0.044

Plats should come pre-gapped at 0.044. All you do is double check the gap and install.

For maximum performance, you want the gap as big as possible before spark blow out, hesitation etc. occurs.

 

Thank you Wizard.
Turbo I had a understanding of what the gaps should be at I missed by not putting .039 to .043 it was late last night when I posted but either way I'm trying to ask other members where they have got the best performance at which is not something you will find in the fsm.
I was gonna go for copper NGK cause the conduction is suppose to be better but the con is there only good for 30k is this true in your experiences Wizard or do you think I should go straight up plat NGK because there pretty close to OEM?

 

^NGK plats are OEM spec, not sure what you mean by "pretty close to OEM". Coppers are great plugs too. I used to run coppers exclusively in my boosted Maximas, but now I run coppers in my NA Maximas as well since a) much cheaper than plats and b) I don't rack up mileage very fast anymore and like the idea of changing the plugs every 30k.

Yes, coppers are said to wear out about 30k. Considering how easy changing spark plugs are on 4th gens, I don't mind doing it every 30k. It also gives an opportunity to check the ends of the plug and look at its color etc to see if that respective chamber is getting the proper combusion. ie pitch black would indicate a rich condition signalling that maybe the injector maybe be faulty/dirty and is dumping too much fuel.

 

^^ on NGK v-Power Coppers. I like to do a plug reading every 25,000 to 30,000 miles. I can practically change 4th gen plugs in my sleep.

I usually buy v-Power Coppers for just under $2 a pop. This is a personal opinion, but older coils seem to play better with coppers.