ok any update?

 

Bad crank sensor that broke down on me toady was the cause of the problem.

 

go with a step colder plug.. should solve your problem

 

...and that what was causing your code?

 

yes since the timings were off from time to time...

 

and how did you figure this out...im just curious... because i worked mine out...

 

ha thought i worked mine out.... i have the okada packs on now i thought that helped a little but this morning had the car idling after i changed my tranny fluid and bang same code again

 

humm, I am interested to see how my cams will do on my car, going to have them on very soon. Ill be looking back for tips if I have any problems ahead of time THANKS ALL FOR INPUT, cant wait for my cams, 280 272 combo im giddy and I dont even have them.

 

Bump on this... Im having the sma eproblem with y IX

 

Lower timing in the alt ingnition maps should help. Hopeless people like me look for the disable p0300 test in the tuning section. I used it and have not thrown the code in a long time. I used to throw it every 7-10 sec. on the highway. It made my car almost unbearable to drive. I had to constantly take my foot of the throttle and get back on it.

 

Thread revival!!

I'm from Australia but the OP had the exact issue i do.
misfiring/stuttering at random times, always part throttle, and much MUCH worse when engine is cold. Sounds like it's running on 3 cylinders.
I also changed plugs and coilpacks. It was back within a week.
sounds like a carbon copy of Xpehbam's problem.

*OP - So how did you diagnose the Crank Angle Sensor as being faulty?*

I've got a IX with cosworth 272s / Green / 700cc injectors.
problem started approx 3 months after it was all installed, no CELs prior to this P0300.
clear it, and it's always back within an hour or so of driving.