Got P300, P301 P303 codes
 

Was driving along, stopped at a traffic light and all of a sudden it started idling a little rough and the CEL started to flash and the computer said to drive slowly to service :eek:

Started to drive and after about 100 feet, the light went out and the engine was smooth again.

I was about 1 mile to my home, drove home and plugged in my durametric

There were 3 codes
http://986forum.com/forums/uploads01...1446498911.jpg

This is the first time I have gotten ANY codes

I did a weekend at the track a week ago and all was good

I have 74k on the clock,. Plugs were changed at 60k Just did an oil change before i went to the track. All the oil changes (4)I have done since i bought the car in March 14 have been good

Any thoughts????

I know it never rains in San Diego but maybe the coil packs are cracked and got wet? Just shooting in the dark here. I hope you get it sorted.

Its not wet here now nor did I drive over a puddle

I know this might sound odd, but i've had a boxster for 2 years that has run like this everytime i start it up.
Code reader stated cylinder 3 misfire.
We took (1) coil from an old engine that came from another boxster in our garage, and popped in a new MAF that we had bought a while back. This thing runs like a top now. The MAF is pretty expensive so i wouldn't go for that first, but i did both at the same time so i can't say what caused it.

Hmmm. Well I would start by checking the coil packs and wires. It could be as easy as loose connectors or old coil packs.

I got my MAF wet a little while ago, and threw the same codes, and idled really rough. Took it out, and gave it a good clean, and left it to dry over night. In the morning she was good as new.

That bank is on the same side as the coolant overflow tube. I had this problem once with a cracked coil pack and a burp from the coolant tank. I changed the coil and displaced the tube a bit.

If the problem is cracked coils and them getting wet, I suppose I could spray some water up that side of the engine when it is running and see if it throws a code

Is that a good idea?

On another forum, someone suggested it might have been an injector as well