Threw a code......

[Aspirations57]

I have not used my Viper in about 2 weeks and today I started it and it threw a code of P0300 = Multiple cylinder misfire. The car started fine and nothing sounded wrong with idle at 1K(I only have 330 miles on it).. I made sure to look under the hood and then took it for a ride. Car ran strong as usual, made a few stops but check engine light stayed on. I stopped to full it up and when I restarted code was gone. What would have caused it to throw that code? I guess its the Vipers way of telling me dont let me sit,lol


One more note: I was in 85 degree heat and my oil temp was about 220 and water ~200-213 is that normal,again car runs fine.
Kevin

[FLATOUT]

My 2015 in Houston heat (100+) this last week saw temps between 190-200 so yours seem a little higher than mine.

[01sapphirebob]

I was just reading a thread with a GEN II that had a misfire code. One of the causes could be low gas apparently.

[Voice of Reason]

I had a misfire code over winter when I started the car for the first time after a month of hibernation. It never came back so it was just a fluke for me.

But your temps are too high unless you're driving around everywhere at 4k RPM. I just did a track day at Gingerman Raceway today and in 82* temps the water was a hair over 200* and oil was the highest I've ever seen at the end of my session at around 223*. If you're seeing oil that hot on street driving there's something wrong, mine is below 200* at almost all times on the street.

[ViperSmith]

i never go above 200 even in 100* weather

[1.8t]

It will come back if it's an issue, otherwise I wouldn't sweat it.

[lochnessmonster]

In response to your question, "What would have caused it to throw that code?" I looked up the definition of "misfire" and here is what I got: "1.a failure of a gun or missile to fire correctly or of fuel in an internal combustion engine to ignite." So, it would seem as though, when you engaged the starter, one or more of the cylinders did not ignite right away. My first inclination would be a lack of fuel pressure, perhaps due to the amount of time the car has been sitting. It just didn't quite pressurize enough. Not sure. In any event, as it has been said, I wouldn't worry about it. If it throws the code while you are driving........that is another story. Personally, I'd would worry about it.