I have an 03 Maxima, over 175,000 miles on it. Recently I got my car back from my sister and on start up i noticed a really "shaky" idle in drive. I have done my research and the best answer is a misfire, since i also had the blinking CEL.

I might have blown a head gasket, but don't know how to check it.

Also, the oil leak is coming from around the oil pan. I checked the plug and it's as tight as possible without breaking it, and my oil filter is on hand tight, so what could it be?

 

i just had a mystery oil leak in my 96, i searched and searched finally i discovered the axle seal on the transmission was bad while i was changing my clutch. not sure if thats whats going on with yours but its worth a shot to check it. cause if it is tranny oil leaking and you dont get it fixed you will end up destroying your tranny...

 

why is this in the garage sub-forum?