ENgine Trouble ?!
 

I have an 3rd gen Rx7 just recently i put a new motor.
It has an BLitz intercooler and power Fc, Blow off Valve, stock twins and Aftermaket air filter basically..we turned it on and it worked fine ut i was havin troubl with the master cylinder couldnt run it...
NOw it sat for about a month and the car started again but it ran rough and it died afte bout 2 minutes now it wont start !
Now i noticed that my O2 sensor wire is broken
could that be reason ?
Checked for gas and spark starter battery and all i could think of !
put stock Ecu also but nothin will get it started... wat else could i check for !
PLz help me out if u know wat cou