Maybe it was aliens from outer space hacking into your ECU. That is the only thing I can think of that wouldn't be figured out by 5 minutes at Autozone. Check it out and let us know!

 

xviper, can I borrow your crystal ball?

 

i went to autozone and i got a P1399

 

P1399 is a temporary DTC for a random or intermittent misfire.

 

So I guess it wasn't low oil pressure, MAP sensor that needed a beating, low fuel, or even aliens.

 

Looking ................... looking ....................... looking ......................
GOT IT!
The power steering plasma got just a bit too low. During high rpm WOT operation, this created a dangerous slosh factor that sent an ambient sine wave to the EPS conduit. Unfortunately, this conduit intersects the one for the fusion injectors, resulting in the depolarization of the gravimetric flux inverter. Result? A momentary random misfire.
Cure? Add a box of Bran Flakes to increase the fibre content of the fuel. This will clean it out, make the injectors work more efficiently. The ECU will then disregard any further plasma slosh.

 

I know the ECM shuts the injectors off during decel, that is not the point.
Willy said he hit 8k RPM, then the CEL came on and flashed three times.
This is usually caused by a lean misfire under acceleration, not deceleration.
My point is that I have seen this before on a few different S2K's that have come in
for service.
Since he retrieved code P1399. This is a random misfire in any cylinder which can be caused by a lean misfire.
If the fuel in the tank is low enough. The fuel will shift to the back of the tank under acceleration (I am sure you guys already new that).
The pump may suck up air and fuel for a split second; until fuel slosh's back around the fuel pump pick-up. Thus causing a lean misfire.
This also may not even be felt by the driver because it happens so quickly.
I would not worry about it as long as the CEL stays off.
If the problem reoccurs get it checked ASAP.

-Cesar

 

It can't be both.

At this point there is only speculation what is or could be the cause.

If you have had several S2k's with "lean misfires" How did you determine that they were caused by Low fuel in the tank?

I know over several S2k's that have run completely out of fuel on a road course, and didn't misfire untill the tank was completely empty.

 

What you have experienced is what is known as a Two Trip Type B trouble fault.....in OBD II speak. For whatever reason your car saw a condition it did not like. You indicate you fuel'd up so I must assume you were low on fuel...good call soslow64. But a number of other things may cause a temporary condition (read temporary 1399 as opposed to a permanent 0301/0302/etc.). 1399 is a Two Trip fault code. In other words if the car doesn't see what it didn't like on the heat up-cool down cycle the temporary code will only be stored not "set". The reason you were able to pull the 1399 is that the computer REALLY didn't like what it saw and a second interogation was verified which led to the flashing. I would concur with SoSlow you were running on fumes. In the future if you run out of gas don't ride on fumes to the pump. That could have cost you a bunch of money.

Utah

 

Yes. I was just speculating.
willy said he was low on fuel "2bars".
I said a few (about 3). This was over a 2year period.
That is why I also said it was rear but possible.
The customers had stated that they were low on fuel, about 1 bar.
One of the cars came in with 1 bar.
Anyway, if the CEL stays off I wouldn't worry about it.

I also agree with Utah; there are a number of reasons why the CEL will come on and flash.

"For whatever reason your car saw a condition it did not like."

-Cesar