random cylinder misfired problem: resolved.

[NISMO SER]

Hi guys

I think I solved my random cylinder misfire problem that I've been having
since a year ago.  Well, I did all the usual diagnostic and also did a
tuneup (replaced O2 sensor, caps and rotor, cleaned the EGR system etc...)
but the problem didn't go away.

One day I was filling up the fuel tank at the gas station and thought of one
list member suggesting that it's the gas cap causing my engine light to go
on.  At the moment I decided to tighten the gas cap a little bit further.
Bingo!  the engine light have disappeared since and I hope it'll never come
back again.

It's funny how this gas cap thing would give me a random cylinder misfire
error code.  I'm feeling so stupid now for all the stuff that I went through
and replacing stuff that I didn't need.

Whoever suggested that it's the gas cap problem, thanks again.  Thank you
all.

David.