So I've been noticing now that it's cold out here in Wisconsin that when I park my truck for a decent length of time (usually overnight) that there's a "knocking" sound coming from what seems to be the bottom of my motor. Once it warms up it goes away, it's the 5.4 with 153000 miles. I'm hoping it's nothing major and any help would be greatly appreciated.

 

what kind of oil filter are you using? first thing that comes to mind

 

I got the same thing but am not worrying about it. Told myself I'm going to drive er till she blows. Or drive until Spring 2016, then sell it.


Ford oil and filter.

 

I suppose I don't owe anything on it if it's her Time to go then it's her time lol

 

Piston slap.

 

Slappa da piston man.

 

Well that doesn't sound very good lol

 

It was a real common problem. You can Google it if you'd like.

Otherwise you have a programmer right? Put it back to stock. Could be too much spark advance and you're getting some pinging. Or try higher octane.

 

No more tuner

 

My 03 has a slight knock on cold start up and then goes away. Has 197k and has been going on since about 130k.