hello all,i am new here and need help..after take off the 4 injectors to cleaning them,previously the battery was disconnected, i started my car,but idle go from around 750rpm to 1200..back to 750..then drops to 200rpm and shutts off.during the abnormal performance the check engine light does not turn on...to add ,the battery was disconnected during 8 days..any help will be greatly appreciated.