I'm dumb reading spark plugs. Fix it please. - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 02-15-2016, 03:28 PM   #1
Newb
Thread Starter
 
Join Date: Aug 2014
Location: MA
Posts: 26
Total Cats: 0
Default I'm dumb reading spark plugs. Fix it please.

Can someone help me 'read spark plugs'? My little franken-derp miata tried to commit seppuku again. Net result seems to be the 99-00 coilpack crapping its pants again. 2x over 2-3yrs. I ordered the fab9 kit to fix it. 04 engine, 99 miata, no vvt running right now since I need warmer weather to finish wiring the vvtuner.

I had one wet/damp plug, one with a tiny bit of ash, and one with a pretty good amount of ash. The codes were p0300 and p0303. Here's how they looked by the numbers (and as viewed from the front of the car)
#4 - a bunch of ash
#3 - a tiny bit of ash
#2 - a little wet
#1 - seemed normal

Since 2&3 fire from the same pack, I could see those two being borked. I really don't get why #4 would be ashy though, which as far as I know means it is running lean. Is there a correlation between a pad coil for 2&3 resulting in a lean #4 cylinder?
Nathan F is offline   Reply With Quote
Old 02-15-2016, 03:56 PM   #2
Elite Member
iTrader: (1)
 
Join Date: Jun 2014
Location: Austin, TX
Posts: 2,849
Total Cats: 271
Default

Here you go.

And here is a helpful NGK page

Girz0r is online now   Reply With Quote
Old 02-15-2016, 04:02 PM   #3
Newb
Thread Starter
 
Join Date: Aug 2014
Location: MA
Posts: 26
Total Cats: 0
Default

Thanks, bud. I did look through some stuff like that. Just curious if there would be a link from the condition of a bad coil causing the good one to be ashy. From the pictures I guess it sounds like its unrelated.

I just don't want to miss a chance to diagnose something. Preventive maintenance I guess.
Nathan F is offline   Reply With Quote
Old 02-15-2016, 04:08 PM   #4
Elite Member
iTrader: (1)
 
Join Date: Jun 2014
Location: Austin, TX
Posts: 2,849
Total Cats: 271
Default

I wasn't aware 99-00 coils work on a 04 vvt motor

And if you're burning oil, I don't think the fab9 kit will help all that much.
Girz0r is online now   Reply With Quote
Old 02-15-2016, 04:12 PM   #5
Newb
Thread Starter
 
Join Date: Aug 2014
Location: MA
Posts: 26
Total Cats: 0
Default

yeah, you can use 'em. Been 10k miles on that setup. The plug wires should be shaved a bit since the spark plug boots stick up about 1/16th" or so otherwise. The only differences between those engine setups should be spark source (cop vs coil pack) and VVT.
Nathan F is offline   Reply With Quote
Old 02-15-2016, 04:14 PM   #6
Elite Member
iTrader: (1)
 
Join Date: Jun 2014
Location: Austin, TX
Posts: 2,849
Total Cats: 271
Default

I guess my real question is, why use them on a 04 motor when the NB2 coils are known to be of better quality?
Girz0r is online now   Reply With Quote
Old 02-15-2016, 04:17 PM   #7
Newb
Thread Starter
 
Join Date: Aug 2014
Location: MA
Posts: 26
Total Cats: 0
Default

Well, simplicity was the main reason. The articles I read about the NB2 into NB1 swap all seemed to point at just using the 99-00 setup. It doesn't mean it's right though. And, I probably didn't know any better at the time. However, that's why I've since gone to the FAB9 COP setup.
Nathan F is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
A Tale of Two Miatas: Hraday93's MSM Build hraday93 Build Threads 82 07-18-2017 04:20 PM
Miata Link 90-93 mmmjesse Miata parts for sale/trade 1 02-22-2016 02:41 PM
AEM plug n play 1990-2005 includes boomslang! 30-1710 Hot_Wheels Miata parts for sale/trade 12 02-19-2016 08:55 PM
What is my 2001 Miata worth? Ncorlis General Miata Chat 7 02-16-2016 03:05 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:21 PM.