I left a mates house lastnight in my 32 gtr giving it a bit up the street then was just cruising and the car like backfired and didnt feel right, but the lastweek or so iv had trouble with one of my coilpack connectors the clips broken and it doesnt clip on it just sits there so its been running on like 5cylinders then 6 so its been running like shit most the time, after it done the backfire wouldnt be suprised if it was the shaft comming threw the zorst as i dont have a cat felt like i shot something out the bak, i looked in the mirror into the cars behind me's headlights didnt see any smoke or anything, also looked down at that time and sore that the oil pressure guauge in the dash was at 0 and the red light on so i pulled over and tuned the car off and we towed it home, are these signs of turn failure or is it to do with the coilpack plug or a blow oilpump or something?? thanks