msmeltzer

2003 Sentra GXE, had head gasket replaced after 60000kms and last week after a heavy rain storm I went to start the car and it felt like it was chocking on it self, one of the cylinders, or a couple were having a hard time to fire up or something, I then drove to work after it idle'd it self out then 4 hours later the same thing, I parked for 15 mins after driving for a bit and bingo it works fine. It seems like it only happens after it's damp. Checked the plugs they seem to be firing fine, putting new ones in on monday just in case, and checked the coil packs to see if they are sending a spark to the plug and they seem to be doing that?? Just wondering if you know of any other problems this could be... I have asked nissan shop and they say can't do anything until engine light comes on..I have been told that engine light may not come on if it's a start up issue since the sensors don't fire till the car reaches proper temp...

Any info would be greatly appreciated.

Thanks

Matt