Originally Posted By: PandaBear
Wait a minute, if it is an iridium plug why would it be worn out so fast? It doesn't make sense.
Also if it is a bad MAP or dirty MAF sensor it wouldn't be just cyl 4 misfire but all 4 of them. I suspect it is vacuum leak around cyl 4 (i.e. if it is used as EGR port or if PCV hose go into only cyl 4).
Was any of the plug loose? Did you lose any coolant (i.e. bad head gasket -> lose coolant or compression issue)?
Iridium is only the electrode. Does it have a platinum or copper ground? A copper ground iridium plug will wear out much faster than a platinum ground plug.
Look at the amount of exhaust leaking through the plug on the ceramic, those have been in there for a long time.
Wait a minute, if it is an iridium plug why would it be worn out so fast? It doesn't make sense.
Also if it is a bad MAP or dirty MAF sensor it wouldn't be just cyl 4 misfire but all 4 of them. I suspect it is vacuum leak around cyl 4 (i.e. if it is used as EGR port or if PCV hose go into only cyl 4).
Was any of the plug loose? Did you lose any coolant (i.e. bad head gasket -> lose coolant or compression issue)?
Iridium is only the electrode. Does it have a platinum or copper ground? A copper ground iridium plug will wear out much faster than a platinum ground plug.
Look at the amount of exhaust leaking through the plug on the ceramic, those have been in there for a long time.
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