Lincoln Repair Questions? Ask a Mechanic for Answers ASAP
A flashing MIL indicates imminent catalytic damage, so I would advise not driving the vehicle until whatever the issue is that is prompting the PCM to flash the MIL has been repaired.
I see on your post that several components have been replaced, however, that information alone doesn't give me the information I need to formulate a diagnosis. Has the PCM been scanned for codes? If so, what are those numbers?, Any freeze-frame data captured along with the codes? Any history on how this came to happen?
Sorry, I did not see the latter part of your post that included the codes. So that information I got. How about freeze-frame data and history on how this come to be?
Thank you for that information.
On these engines, most of the times when the timing chain jumps out of place the result is internal damage to valves and pistons. Did the guy start the engine right after he changed the timing component? Was it running rough? Did he perform a compression test?
Misfires are usually the result of an air/fuel mixture that's too lean - confirmed here with lean codes P0171 and P0174. Another factor to consider is the random misfire indicated by P0300.
In conclusion, if compression and ignition are good, then fuel must be the cause. Have your guy test fuel pressure; if not 35-45 psi, have him replace the fuel pump and retest.
Please let me know what you find.