After market spark plugs?

dc2turbo

Senior Member
Joined
Jan 27, 2016
Threads
44
Messages
2,918
Reaction score
2,074
Location
usa
Vehicle(s)
civic,teg
Country flag
you can gap them but you just got to be really careful and don't touch the electrode. Use a feeler gauge.

when i said gapping the plugs i meant check with a feeler gauge to make sure they are pre gaped correctly. They can be off by the factory

if you really want a colder plug. just go to NGK web stie and break down the part number. it will tell you what thread size/heat the factory plugs are then you search for one step colder
Sponsored

 
OP
OP

solidus

Member
Joined
May 31, 2017
Threads
13
Messages
48
Reaction score
12
Location
Orange County
Vehicle(s)
Civic Ex-t 2017
you can gap them but you just got to be really careful and don't touch the electrode. Use a feeler gauge.

when i said gapping the plugs i meant check with a feeler gauge to make sure they are pre gaped correctly. They can be off by the factory

if you really want a colder plug. just go to NGK web stie and break down the part number. it will tell you what thread size/heat the factory plugs are then you search for one step colder
Ok guys!!! I'm back with the pictures! Apparently I didn't think much of what gas would be best with my turbo baby lol like sgt said I also used shell 91! Now my tuner said that shell is shit for turbo car on account of the additives that they drop in which brings down their octane to 90 89 1/2 which can cause my engine to not properly ignite causing too much heat and thus dry fouling occurred. Make sure to use the highest octane around and do not use boosters! For they will also burn the plugs!! Once in awhile is ok. I live in cali so I think it's all a gimmick anyways. For those who live in cali I've been running 76 91 on the misfiring plugs and have noticed a huge improvement my tuner also suggested 76 fuel as well, because it is the only fuel that will get us the closest to 91 with out adding an octane booster! With that being said I'm ordering new oem plugs today and I am going to continue to run 76 91. Sorry about the pictures might be a little blurry was taken with my iPhone 7+ so I do apologize.

Honda Civic 10th gen After market spark plugs? IMG_0953.JPG


Honda Civic 10th gen After market spark plugs? IMG_0954.JPG


Honda Civic 10th gen After market spark plugs? IMG_0955.JPG
 
Last edited:
OP
OP

solidus

Member
Joined
May 31, 2017
Threads
13
Messages
48
Reaction score
12
Location
Orange County
Vehicle(s)
Civic Ex-t 2017
Ok guys!!! I'm back with the pictures! Apparently I didn't think much of what gas would be best with my turbo baby lol like sgt said I also used shell 91! Now my tuner said that shell is shit for turbo car on account of the additives that they drop in which brings down their octane to 90 89 1/2 which can cause my engine to not properly ignite causing too much heat and thus dry fouling occurred. Make sure to use the highest octane around and do not use boosters! For they will also burn the plugs!! Once in awhile is ok. I live in cali so I think it's all a gimmick anyways. For those who live in cali I've been running 76 91 on the misfiring plugs and have noticed a huge improvement my tuner also suggested 76 fuel as well, because it is the only fuel that will get us the closest to 91 with out adding an octane booster! With that being said I'm ordering new oem plugs today and I am going to continue to run 76 91. Sorry about the pictures might be a little blurry was taken with my iPhone 7+ so I do apologize.

View attachment 45752

View attachment 45753

View attachment 45754
Actually that last one looks pretty good lol
 
OP
OP

solidus

Member
Joined
May 31, 2017
Threads
13
Messages
48
Reaction score
12
Location
Orange County
Vehicle(s)
Civic Ex-t 2017
you can gap them but you just got to be really careful and don't touch the electrode. Use a feeler gauge.

when i said gapping the plugs i meant check with a feeler gauge to make sure they are pre gaped correctly. They can be off by the factory

if you really want a colder plug. just go to NGK web stie and break down the part number. it will tell you what thread size/heat the factory plugs are then you search for one step colder
Sorry man didn't mean to reply to you I don't know how to delete the post lol
The heat range looks okay... I did wonder if you were burning manganese based (MMT) octane booster at first sight.
Once! I did once! Good eye ;) but it looks like the electrode melted it's pretty beat up.
 


invader

Senior Member
Joined
Nov 20, 2015
Threads
5
Messages
506
Reaction score
258
Location
North-Eastern Ontario Canada
Vehicle(s)
2019 Corolla Hatch SE 6-spd
Country flag
Sorry man didn't mean to reply to you I don't know how to delete the post lol


Once! I did once! Good eye ;) but it looks like the electrode melted it's pretty beat up.
The electrodes are intact... They're just covered in that distinctive powdery reddish residue. Is it burning any oil?
 

dc2turbo

Senior Member
Joined
Jan 27, 2016
Threads
44
Messages
2,918
Reaction score
2,074
Location
usa
Vehicle(s)
civic,teg
Country flag
holy crap your plugs looks horrible.
My still looks brand new after 11k

btw best way to check plugs is to do a WOT pull then shut off the engine
 

Syntek

Senior Member
Joined
Jan 18, 2016
Threads
33
Messages
1,012
Reaction score
697
Location
Los Angeles, CA
Vehicle(s)
2019 PWP Civic Si Sedan
Vehicle Showcase
1
Country flag
hmm... im experiencing misfire on cold start idle and I've ONLY been putting in shell 91. Runs fine after the engine is warm. curious if this is the cause of it...?
 

dc2turbo

Senior Member
Joined
Jan 27, 2016
Threads
44
Messages
2,918
Reaction score
2,074
Location
usa
Vehicle(s)
civic,teg
Country flag
hmm... im experiencing misfire on cold start idle and I've ONLY been putting in shell 91. Runs fine after the engine is warm. curious if this is the cause of it...?
im using Shell gas but its 93
 

Syntek

Senior Member
Joined
Jan 18, 2016
Threads
33
Messages
1,012
Reaction score
697
Location
Los Angeles, CA
Vehicle(s)
2019 PWP Civic Si Sedan
Vehicle Showcase
1
Country flag
im using Shell gas but its 93
How many miles does your car have and does it have rough idle at cold start? I just broke 30k a few days ago. CA doesn't carry shell 93 unfortunately. I may have to check my plugs and see how they look like.
 


dc2turbo

Senior Member
Joined
Jan 27, 2016
Threads
44
Messages
2,918
Reaction score
2,074
Location
usa
Vehicle(s)
civic,teg
Country flag
How many miles does your car have and does it have rough idle at cold start? I just broke 30k a few days ago. CA doesn't carry shell 93 unfortunately. I may have to check my plugs and see how they look like.
11k idles perfectly
 
OP
OP

solidus

Member
Joined
May 31, 2017
Threads
13
Messages
48
Reaction score
12
Location
Orange County
Vehicle(s)
Civic Ex-t 2017
How many miles does your car have and does it have rough idle at cold start? I just broke 30k a few days ago. CA doesn't carry shell 93 unfortunately. I may have to check my plugs and see how they look like.
Check them and upload pics if you can!!!
 

17siturb0

Senior Member
Joined
Dec 3, 2016
Threads
6
Messages
1,315
Reaction score
843
Location
U.S North east
Vehicle(s)
2017 civic si sedan, 2006 civic si coupe
Ok guys!!! I'm back with the pictures! Apparently I didn't think much of what gas would be best with my turbo baby lol like sgt said I also used shell 91! Now my tuner said that shell is shit for turbo car on account of the additives that they drop in which brings down their octane to 90 89 1/2 which can cause my engine to not properly ignite causing too much heat and thus dry fouling occurred. Make sure to use the highest octane around and do not use boosters! For they will also burn the plugs!! Once in awhile is ok. I live in cali so I think it's all a gimmick anyways. For those who live in cali I've been running 76 91 on the misfiring plugs and have noticed a huge improvement my tuner also suggested 76 fuel as well, because it is the only fuel that will get us the closest to 91 with out adding an octane booster! With that being said I'm ordering new oem plugs today and I am going to continue to run 76 91. Sorry about the pictures might be a little blurry was taken with my iPhone 7+ so I do apologize.

IMG_0953.JPG


IMG_0954.JPG


IMG_0955.JPG
I kinda figured it was the gas, but more so it's the tune.. who's tuning your car? If you only have 91 available, your tuner needs to fine tune it for that octane, and then compensate the tune slightly incase the gas you get one day isn't the best of quality.
 

Syntek

Senior Member
Joined
Jan 18, 2016
Threads
33
Messages
1,012
Reaction score
697
Location
Los Angeles, CA
Vehicle(s)
2019 PWP Civic Si Sedan
Vehicle Showcase
1
Country flag
Checking back. I will upload my findings tonight. I've been super busy but today I finally got a misfire code P0301. I already ordered spark plugs just incase since I usually swap them out on all my cars every 30k milesbut man, today's cold start idle was severely bad.

Honda Civic 10th gen After market spark plugs? p0301
 

Bolanosomar94

Member
Joined
Jun 4, 2016
Threads
0
Messages
25
Reaction score
6
Location
Los Angeles
Vehicle(s)
2016 Honda Civic Coupe LX-P
Country flag
Even the Type R uses the same plug as all other models turbo models. 12290-59B-003 / SPARK PLUG (ILZKAR8H8S) (NGK)
You don't gap Iridium or Platinum spark plugs, they are pre gapped. You can crack/break them doing so.
NOTE: Do not adjust the gap of iridium tip plugs. Do not use plug cleaner.

For CHECKING gap:
Electrode Gap
Standard (New): 1.5l Turbo non Si
0.7-0.8 mm (0.028-0.031 in)

Electrode Gap for Si
Standard (New):
0.70-0.75 mm (0.0276-0.0295 in)

K20C1 Engine:
0.7-0.8 mm (0.028-0.031 in)

K20C2 Engine:
1.0-1.1 mm (0.039-0.043 in)

You can go to NGK's website and figure out what you need from using the ILZKAR8H8S as your reference.
I believe you need a thin wall deep well socket to get these spark plugs out... (14mm???)

My initial gut reaction is that it's a tuning problem.
Post pictures of the spark plugs.
Note: proper spark plug analysis does require looking deep down the side of the ceramic (cutting the threads off and using a magnifier to look at deposits.)

Honda inspection notes:
Fouled plugs may be caused by these conditions:

Retarded ignition timing

Oil in combustion chamber

Incorrect spark plug gap

Plug heat range too COLD

Excessive idling/low speed running

Clogged air cleaner element

Deteriorated ignition coils


Overly rich, cooling your spark plug below operating temperature where it cannot clean itself.
Other possible causes could be low compression or vacuum leak.
Are these the same for the 2.0 engines?
Sponsored

 


 


Top