Bought this truck used less than a month ago, 74K on the clock.
About a week ago it developed a low rpm knock that only stays for a few seconds. It got worse soon after. I know the video is crap but its all I got. Anyone have any ideas what could cause this? Today I did an oil and filter change and an air filter. Now it dies when this happens. HELP!
http://www.youtube.com/watch?v=JmzEt...ature=youtu.be

 

"Death Rattle" Very common problem. Unfotunately a very expensive one.

 

Any more info you could share?

 

Did you buy it private party or from a dealer?


It sounds like someone used some different oil to hide the main problem for a bit. If you got it from a dealer then you may be able to return under lemon law.

 

I bought it from a small dealer, warranty was As Is. I just looked over the paper work and it shows that they are not responsible for any repairs. Im wondering if they knew the truck had the issue to begin with.

I read on another forum that another fella had the same issue that was fixed by raising the idle speed. It may be worth a shot....

 

I would say yes they knew about the problem and hide it to sell the truck. Anything is worth a try at this point. I am not sure what your issue is but I wish you the best of luck.

 

I wonder if there is any way to pull anything off the computer to show it was having issues prior to me buying it?

 

Not sure I would be willing to bet that if they knew something was wrong they cleared that computer well but you never know.

 

Found something quiet intresting, locks that are installed in the phaser to not allow movement, either fully advanced or fully retarded. I may look into this, hell, if it means a fix for 50$ that I can do in my own garage AND the thought of no future issues, I am on board. It does say a it will need to be tunned but 50 for the lockouts and a few hunder for a tune... cheaper than the price of one replacment phaser.
Ford 4.6/5.4L 3-Valve Cam Phaser Lockouts - Livernois Motorsports

 

The last time I encountered this it cause was the Timing chain tensioners.
located inside the front cover.
As I understand they are oil pressure moved and will sometimes clog up and stop working.

 

Replace your spark plugs with MOTORCRAFT PLATINUM SPARK PLUG from AutoZone for $12.99 each and the sound will go away. (Part Number: SP-515). I had the same issue and this was the cause. DO NOT REPLACE THE PLUGS WITH ANYTHING ELSE!!!!!

I hope this helps.

 

Did you get this fixed? This is the EXACT noise mine was making before digging into the cam phasers to finding the passengers' side tensioner was stuck in the compressed position. Replaced the entire front end and the noise is gone.