Help me check my spark plugs?
#1
Full Member
Thread Starter
Join Date: Jan 2011
Location: New York
Posts: 142
Likes: 0
Received 0 Likes
on
0 Posts
![NY](https://www.rx7club.com/images/icons/ny.jpg)
So I decided it was probably time to change the spark plugs tonight. Been idling a little rough lately and it seems to hesitate from time to time when I mash the throttle. These plugs that I took out have probably been in the car about 2 years (maybe 3, can't really remember). Anyway, I've never been good at reading the plugs to determine if things are running well or if it's running rich/lean, so I thought I'd ask everyone for help. Thanks!
#2
Moderator
![](/images/misc/20_year_icon.png)
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,989
Received 2,688 Likes
on
1,903 Posts
those actually look worn, but otherwise really good.
when looking at the plugs you're looking at the color of the porcelain inside, you want it to be a nice brown color, like yours are. white = lean, black is rich.
when looking at the plugs you're looking at the color of the porcelain inside, you want it to be a nice brown color, like yours are. white = lean, black is rich.
#7
acdelco d1906 Nkg 49034
![](https://www.rx7club.com/images/misc/05_year_icon.png)
fuel filters? who cares
spark plugs? NKG's all the way............autolites are good if and only if you are trying to get a rebuilt engine to run. Switch to NKG's when you verify that you got a spark.
Or simply, go with NKG's they are readily available at autozone, o reily's , advance auto, or whatever
spark plugs? NKG's all the way............autolites are good if and only if you are trying to get a rebuilt engine to run. Switch to NKG's when you verify that you got a spark.
Or simply, go with NKG's they are readily available at autozone, o reily's , advance auto, or whatever
Trending Topics
#8
Full Member
fuel filters? who cares
spark plugs? NKG's all the way............autolites are good if and only if you are trying to get a rebuilt engine to run. Switch to NKG's when you verify that you got a spark.
Or simply, go with NKG's they are readily available at autozone, o reily's , advance auto, or whatever
spark plugs? NKG's all the way............autolites are good if and only if you are trying to get a rebuilt engine to run. Switch to NKG's when you verify that you got a spark.
Or simply, go with NKG's they are readily available at autozone, o reily's , advance auto, or whatever
Thank you very much, midnight mechanic!
-David
#10
Full Member
![](https://www.rx7club.com/images/misc/10_year_icon.png)
ND or NGK 4 prong plugs all the way, rockauto has both. Get the $4-5/ea plug. Don't bother with the cheapie two prong/conductor plugs from other vendors. There is also a $27/ea iridium plug from ND; I can't possibly see how it could be worth the extra money as iridium plugs in 2 & 4 strokes have never been worth the money.
#12
Full Member
Thanks guys, I went to order the plugs and no ones wants to ship them to my military address overseas so I am gonna go to Autobacs (Japanese autozone) and see if I can find a good alternative here. I gotta learn more Japanese!
-David
-David
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM