Technical Random cutoffs, or engine not starting

[gabor1]

Hi

I have a 2000 Fiat Seicento 1.1 Sporting. The problem started 2 days ago. So the car started to do this thing: at small throttle - 0.5 second stall - then it goes again, but when i shut it off and try to start again it doesnt want to start unless i try to start in a gear and make a normal start. Then the problem solves for a few minutes of drive. This also happens when i want to take off in 1st gear and it chokes itself or i dont know. The problem doesnt come up unless the engine is warmed up. OBD showed a P0335 CKP sensor problem, but it randomly disappears and shows up on every 3rd or 4th startup. I've recently bought 4 NGK spark plugs and a new fuel filter but havent changed them yet. Any suggestions? Last time it stalled in 3rd gear and coasted to a parking lot

Thank you for your help!
Gabor

 

[Prawny12009]

Crank sensors often fail when warm but work on again cold.

BUT these cars can also play up when entering closed loop if something is wrong, try unplugging the O2 sensor temporarily to do the car entering closed loop to see if it runs without cutting out.