Replacing the Sparks Plugs...
- Thread starter 4wardmotion
- Start date
Ok, I guess I will get burned but I will try the spark plug change... I read this whole post and we only have speculations and no actual testing. No one has taken the spark plugs out and check their deterioration?
Personally my wife CX-9 '08 have been super good besides the SUPER crappy winter OEM tires and original battery died. I have the same random quick "ping" while driving it.
I will try getting photos of the OEM plugs and report on the behavior after changing the spark plugs.
Personally my wife CX-9 '08 have been super good besides the SUPER crappy winter OEM tires and original battery died. I have the same random quick "ping" while driving it.
I will try getting photos of the OEM plugs and report on the behavior after changing the spark plugs.
Wow! Almost a year after, I revisit my same post about the CX-9 ping..... Well, here is an update as I changed the spark plugs yesterday and so far the SUV is running very nice! I will try to get some photos of the old plugs to help here....
So, here is a short story...
PROBLEM:
- The wife SUV pinging got super bad! Like engine light on and sometimes flashing due to misfires.
- While driving it, I had to pull over shut off the vehicle and wait a minute to see if the car will start ok for driving back. (Trick works, don't abuse.)
- If this is your case and the SUV has over 100k miles and spark plugs have not been change.. you should definitely do it!
WORK: (2/5) <-- is just time consuming
Day 1:
- Use some Seafoam in oil and gas according to directions in can
- ** If you know how to.. seafoam the intake by injection.. <-- not required
- Run vehicle to clean up with seafoam
Day 2:
- Change the x6 spark plugs
- Change oil and put new gas
INSTRUCTIONS
- Here is a site explaing what is needed
http://www.mazdas247.com/forum/showthread.php?123773226-How-to-get-to-the-spark-plugs
- In super summary for people use to work in cars:
+ Pay attention to the plenum (air box connecting to intake manifold).
+ Take bolts little by little pretty obvious and you will feel it get loose
+ ATTENTION to sensor in back of plenum and back bolt
+ The plenum has some GASKETS so you might want to change those. I didn't have them at that time.
+ Specs: Plugs at 15Nm and bolts at 7Nm
+ Spark Plugs gap: I used .55 on mine
FINDINGS:
- So as I did this work I found the following details interesting...
- Intake seems to have collected some carbon build up at 100k. Little but more than my A4 for sure at 160k.
- Spark plug had different gappings from OEM and the vary from .53 to .61, and that's quite a big difference.
+ Very interesting was that the ones gap higher to ~.60 where the most wet and damage.
+ Others at ~.55 look almost new.. which in my head seems to make sense since they will fire sooner.
- Throttle body in my car was missing the bolt that will hold it in place.
+ I can imagine the throttle body bouncing and hitting the lower metal bracket which I wonder if it damages it as some reports I have seen for the CX-9
Hope this help others.
FYI - I am not an certified mechanic or anything. Just a street modder who loves playing [
]
So, here is a short story...
PROBLEM:
- The wife SUV pinging got super bad! Like engine light on and sometimes flashing due to misfires.
- While driving it, I had to pull over shut off the vehicle and wait a minute to see if the car will start ok for driving back. (Trick works, don't abuse.)
- If this is your case and the SUV has over 100k miles and spark plugs have not been change.. you should definitely do it!
WORK: (2/5) <-- is just time consuming
Day 1:
- Use some Seafoam in oil and gas according to directions in can
- ** If you know how to.. seafoam the intake by injection.. <-- not required
- Run vehicle to clean up with seafoam
Day 2:
- Change the x6 spark plugs
- Change oil and put new gas
INSTRUCTIONS
- Here is a site explaing what is needed
http://www.mazdas247.com/forum/showthread.php?123773226-How-to-get-to-the-spark-plugs
- In super summary for people use to work in cars:
+ Pay attention to the plenum (air box connecting to intake manifold).
+ Take bolts little by little pretty obvious and you will feel it get loose
+ ATTENTION to sensor in back of plenum and back bolt
+ The plenum has some GASKETS so you might want to change those. I didn't have them at that time.
+ Specs: Plugs at 15Nm and bolts at 7Nm
+ Spark Plugs gap: I used .55 on mine
FINDINGS:
- So as I did this work I found the following details interesting...
- Intake seems to have collected some carbon build up at 100k. Little but more than my A4 for sure at 160k.
- Spark plug had different gappings from OEM and the vary from .53 to .61, and that's quite a big difference.
+ Very interesting was that the ones gap higher to ~.60 where the most wet and damage.
+ Others at ~.55 look almost new.. which in my head seems to make sense since they will fire sooner.
- Throttle body in my car was missing the bolt that will hold it in place.
+ I can imagine the throttle body bouncing and hitting the lower metal bracket which I wonder if it damages it as some reports I have seen for the CX-9
Hope this help others.
FYI - I am not an certified mechanic or anything. Just a street modder who loves playing [
]
Last edited:
