I found this through a Google search and here’s my situation:
2006 Expedition Limited 131k. Paint is faded from AZ sun and front seats are torn. It ran smooth for 3yrs and I have only put about 4K/yr on it as I have a short work commute and only really use it for towing my motorcycles to the local track(10mi round trip) other than commuting.
Back in Dec while driving to work I swerved to avoid some road debris and afterwards I couldn’t accelerate above 50mph. I got a check engine light and shut down the motor. I ran the codes and got 3 misfire codes but stupidly cleared them and haven’t been able to get the codes to come back as the engine will crank but not start.
I noticed an oil leak from the passenger side VCT and replaced it. Still doesn’t start. I had a mobile mechanic look at it and he couldn’t determine root cause only that there was no spark. He determined it might be PCM but couldn’t say for certain. Since then I have done an oil change, changed crank angle sensor and cleaned throttle body and both cam position sensors. I had another mobile mechanic look at it and he determined it’s low compression and most likely timing chain issues(possibly skipped). Before the breakdown it ran fine however I noticed a rattling noise from passenger side that I thought was alternator but now think it was the chain tensioner.
Like OP I can do replacement work but wouldn’t know what to check while doing it. I have done a timing belt before but not a chain. I am willing to put maybe $1500 into this as due to the paint and front seats it’s worth maybe $3-4k max in running condition so no point paying $5k+ for a quality rebuilt motor.
That said, where would I go to get the timing chain set? I found this kit on Amazon and it looks like OEM parts but a few reviews have said it is missing some of the parts needed:
https://a.co/d/5dPjNOv