Spark Plug Diagnosis
#1
Senior Member
Thread Starter
Spark Plug Diagnosis
I've been concerned that my coolant seals might be going and it was almost time to change my plugs anyway so I pulled these to look for "wetness". They look pretty normal to me, but I thought I'd throw them up here for some opinions. On the 3rd pic you can see some "goo" on the ceramic body, any ideas what that is? What about the residue on the threads? Any comments welcome, thanks.
http://www.jrx7.com/images/Plugs/SparkPlugs1-5-02-1.JPG
http://www.jrx7.com/images/Plugs/SparkPlugs1-5-02-2.JPG
http://www.jrx7.com/images/Plugs/SparkPlugs1-5-02-3.JPG
http://www.jrx7.com/images/Plugs/SparkPlugs1-5-02-1.JPG
http://www.jrx7.com/images/Plugs/SparkPlugs1-5-02-2.JPG
http://www.jrx7.com/images/Plugs/SparkPlugs1-5-02-3.JPG
#2
It looks to me like you might be running a little rich, unless you havent chenged them for a long time... do you have ign. amp? they look a little white and kind of chaulky, the one looks kind of beat up too, I would look into it if those were my spark plugs
#3
Rotary Enthusiast
The goo on the ceramic body is melted sealant from the knock sensor. This is common on all FDs. As for the residue on the threads, it should be anti-seize. The color of the plugs looks good. It should be a creamy brown color.
I'm running a little rich so my plugs are much darker. As long as it's not ashy and white your o.k.
I'm running a little rich so my plugs are much darker. As long as it's not ashy and white your o.k.
#6
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trex is right. my seals went and no signs of smoke or spark plug fouling. i think the combustion gases were going into the cooling system but the coolant was not going into the combustion chamber. Either way the seals were still shot.
#7
It looks to me like you might be running a little rich
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#11
Retired RX7 mechanic
Join Date: Feb 2001
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I wouldnt worry about it right now. I would just drive it til there is alot more smoke.
If your getting it in the morning it might just be the normal "morning smoke"
If your getting it in the morning it might just be the normal "morning smoke"
#13
Senior Member
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Mine's not that bad, but close on the real cold AM's though. Thing is the smoke doesn't smell like coolant. It does sputter when first started, usually after it's sat for more than a day. I smell coolant when I'm sitting in the car driving, usually when I first turn on the heat. The car is loosing coolant, about 1/2 cup a day. Haven't been able to find the leak, if there is one.
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The1Sun
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