Okay I was driving my car today and I was on my way home and all of a sudden my car started acting up really wierd. I havent had any problems at all with my 240sx untill today. My car was shaking really bad when it was ideling and when I would rev the engine up a little it would start sputtering and it wouldnt go very fast at all. I took a couple spark plugs out and the second one nearest the front of the engine, when I took it out there was a bunch of oil that gushed out with the spark plug, and I dont think that is good or something that should happen.The spark plug looked a little burnt almost. The exhaust sounded really bad it almost sounded like a 4-stroke dirt bike. I was wondering if there is anybody out there that knows maybe what my problem might be. Im not a big mechanic guy so I dont know a **** load about cars but I know most things. So If somebody that knows what this problem might be that would be awesome if you could help me out. If anybody doesnt understand what im saying just reply and maybe I can explain it better. Thanks

 

check your MAF sensor, mine had a similar problem like yours. Also check your coolant temp sensor plug to see if there's any corrosion.

 

I'm having the same problem with mine. It idles shaky and it won't rev past 2500. When it hits that it just bounces off it and shakes really bad. I tried changin the fuel filter, but that didnt' help. Any ideas is appreicated. And yes, it sounds like a dirt bike, lol.

 

ROFLMAO...I checked my MAF...hehe....it had come unplugged. (kicks self). Oh well, problem solved, and I got a nice 300zx fuel filter.

 

your oil in your spark plug holes that gushed out is your valve cover gakset or the gakset under the valve cover if you take your valve cover off and flip it up-side down there are gaskets for your spark plug holes. replace them.