Hi,

I inherited a 2006 Ford F150 Super Cab Engine: V8, 5.4 Liters Automatic 2WD. I believe the engine was rebuilt. I received the truck in Jan after it had been sitting since Nov. I had an issue where the truck was misfiring but I chalked it up to bad gas. I swapped coil pack spot from 1 to 2 and the misfire didn't follow after that. I have driven the truck about 200 miles since then. Everything was fine until 2 weeks ago. I was getting a spare key made. The best I can describe it is if the park brake was held down and u try to go. No check engine light. I am move it but barely. I used forscan and I saw the p2006 code on there several times before this issue happened. It is not showings on there now. Could that be the issues?


Video of the truck in action


Thanks everyone!

 

It may be your brakes. Sometimes the parking brake friction material breaks loose from the brake shoe and jams when you are moving. It generally frees up as you pull forward but in your case may be jamming. I would jack up the rear wheels then put the truck in neutral and see if the rear wheels will turn. If they don't turn you likely found the problem. I replied to a similar post yesterday. June 6 ceremony at the mall today, they were real men.

BTW rear brakes are disc, parking brake is a drum integral to the rear rotors

 

Hopefully Jimboy is right but that sounds like a rod knock to me.

 

is the Brake light on the dash lit ?

 

Motor doesn't sound good . But you can have sticking calipers. I did after a brake job pushed pistons back in but then they intermittently stuck on . Problem is piston is composite material , when out it absorbs moisture then sticks at times . Fix is rebuilt calipers . AS for the parking brake , they sometimes never get attention or used . So Jack it up and lube and service them . Salt will freeze the linkage up .Use mode six to find your misfires. Do a full proper tune up .

 

I agree. That sounds like the noise is coming from the engine. If that were my truck I would freak out when I heard that. Wow! You could hear from 2 houses away.

 

I jacked the rear truck up and I could spin the wheels. Forscan mode 6 don't show any misfire. Everything was grade b.

 

They usually do not misfire while they are knocking until the end
Damn the bad luck
I think you need a longblock
At least your neighborhood leads me to believe you can afford a new engine
Good luck

 

Motor or something definitely doesn't sound good, but I can't tell if it's rod knock or possibly something else. The 5.4 3v is notorious for having issues with the timing chain stuff and if tensioners and stuff gets super sloppy you can really have them whipping around making noises and chunks plugging up the oil pump pickup. The vct solenoids can make a tapping or knocking sound, you could try unplugging those and see if it changes anything.

 

I unplugged the vct solenoids today and no change in the way the truck runs or acts.