I'm trying to figure out why my Lincoln lS V8 is idling so rough, I was driving it today and the check engine light starting blinking, I was about 5 min. from home so I drove it home and had a friend come over and read the codes. The codes P0136 " Circuit Fault" P1000 "System check incomplete" P1131 "Sensor indicates Lean" P1137 "System indicates lean" and finally "Injection 1 and 3 fault" From what I have read because of the two Injection faults that can cause the codes for "Sensors Indicating Lean" to go on. The computer did not show misfires, just showed faults for 1 and 3. What could this be? how would I go about to looking for the problem. Thanks in advance.