My relaible Sentra up and died on the highway yesterday. At first, there was a little hesitation while cruising along. I though the gas gage was busted and I was out of gas, even though I knew I wasn't. So I genttly cruised the car at 2000 rpm just to be on the safe side till I got off of the highway. A few monents later the rpms just gently dropped all the way down to zero, followed by 1 massive backfire.
The car's dead and I'm stuck on the highway. The battery's good. It turns over the car like a champ every time, but the tach completely refuses to budge. I get the car towed home and start my investigation. Seeing some grimy oil on the valve cover gets me to look closer and I find that the last spark plug (the one next to the oil filler cap) is absolutely drowning in oil. All the other plugs are bone dry. So my valve cover must have failed . .spectacularly. What has me scratching my head is if the valve cover failed and oil is leaking into one spark plug chamber only, shouldn't the car have been running badly on 3 cylinders? All my ignition parts, rotor, cap, wires and spark plugs are less than a year old.
I've already got the valve cover and spark plug gaskets on order and I'll do another thorough tune-up as well replacing all the maintenance ignition parts again.
Any tips, suggestions, etc?
By the way it's the 1.6 motor, GA16DE.
Thanks
CD