it is possible that your cam or crank sensor is faulty. it is a common
problem for the lh body style vehicle. it is recommended that you replace
both sensor when one fails because both sensors share the same power feed.
if one is shorted it takes the other one out also.
also it is possible that your throttle body is dirty. i would try cleaning
your throttle body with a throttle body spray chemical first before
proceeding to the above solution