Cranks good and engine start for 2sec on first start then only cranks

[broken]

Good battery
New ignition switch

4,4 v8

So today when i try to start the car it started on first attempt and dies after 2sec. No missfireing seems to run smooth and then just dies. Second attempt same. Third attemt i gave some gas and runed up to 3000rpm then dies.

Tried couple of hour later
Starts and dies after 2 sec. Second time only cranking.

So what to start with?

Try some start gas and see if its fuel related?
Check sparkplugs for spark?

After some reading here im guesing:
Fuelpumprelay?
Relay for DME?
Crank shaft sensor, or is this only in use after start up?

OR

I had the cheak engine light on the other day and had the codes cheaked out:
it was the preheating for the o2 sensor(lambdasond)
The indy errased it and the light whent away.


Please any ideas

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So hooked it up and did a ODB2 scan with key in position 2. Same code as before about the o2 sensor but nothing else.

I didnt get the vin number?

When I monitored the "live data" of the sensors with key in position 2 i get 0.0 on them and i get air intake temp to show.

When i was trying to start the car i get error on all off the sensor?

So please any ideas?

If any body knowes does a problem on the I-bus interfer with OBD2 scans?