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Ka24de misfiring only after warmed up and ran hard.

6.4K views 11 replies 4 participants last post by  hatchtastic  
#1 ·
Car runs fine cold. Warmed up runs fine then i rev it at 5k a few times and it then is misfiring. At idle or wherever a constant misfire. Guy I bought the car from said there is a spark plug that is stuck. The other three are brand new. Im thinking this may be the problem but i want to hear other opinions.

Also, what could be causing this spark plug to be stuck??
 
#6 ·
Shoot some PB Blaster in the hole the stuck plug is in. Run it hard to get it hot. Then try to pull the plug when the motors cool enough to work on. Not too cold but cool. Meaning still warm if you rest on it.

I had a stuck plug and that's what I did. Also if it gets hard trying to take it out shoot a little more and go forward and back on the threads to help loosen it up.
 
#7 ·
so the valve cover gasket was put on wrong by whoever did it. it was pinched and lots of oil was getting into the hole for spark plug 3. got the valve cover off and ordered a new gasket. But something is around the spark plug that feels like rubber, a gasket of some sort. stopping me from getting the socket around the plug!!?