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'99 Cylinder 3 Misfire code help Forums > > '99 Cylinder 3 Misfire code help '99 Cylinder 3 Misfire code help
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Old 11-30-2012, 09:13 AM
Jpfab Jpfab is offline
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1999 Altima
 
Join Date: Aug 2012
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Question '99 Cylinder 3 Misfire code help

The other day my altima started running rough. It would shake and rumble during idle and acceleration. I had a check engine light come and and with the code reader it told me I had a misfire in cylinder 3. The slot containing the 3rd plug had oil in it (which is what I assume caused my misfire). I drained the oil back down, and restarted it. The car now runs better but still has a "pending" misfire. I swapped the spark plug itself with a different one, and the misfire did not move along with it. So i concluded that the plug is fine.
My uncle suggested that I should check and see if it is the wire. In a little bit I am going to check the resistance on it...If that is fine then I will be really worried...
MEANWHILE, the biggest issue is why is there oil in the sparkplug housing? Is that just a leaky valve cover gasket and when I replace that everything will be good? Or is that potentially a blown head gasket?
The only other piece of information I have is that after I swapped plugs and ran it, the engine was smoking from the top and it looked to be coming from under the exhaust manifold. I realized it would smoke as the oil was being burned but is from under the exhaust manifold normal?
THANKS!
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Old 11-30-2012, 03:43 PM
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bennyb53 bennyb53 is offline
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2019 Sentra
2002 Altima
 
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1. The oil inside the spark plug well (the tube) is likely caused by a worn out tube seal. To replace it just remove the valve cover as you have to install it from the inside. You might as well replace all. If you haven't do so, also install a new valve cover gasket and torque to specs. Oil might be leaking there and drips to exhaust piping.
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Old 12-02-2012, 11:46 PM
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smj999smj smj999smj is offline
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2006 Pathfinder
2003 Frontier King Cab
2003 Frontier KC SVE 4x4
 
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The 99 will only have two gaskets: one valve cover gasket and one spark plug tube gasket (all four tubes are incorporated into one gasket). If you get a Fel-pro valve cover set, it will also give you new grommets for the valve covers.
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