Hi guys

Well I knew this topic has probly been touch before. I have 05 f150 4x4 with 72,000 miles. Every time I go between 45-50 mph my truck gets loud ( coming from the bottom) then it has a hesitant gear changing. I have no cel. I took it to the the dealer and they told me it was my manifold gasket. So they change it. But it's still doing the same thing. Oh also they changed all my spark plugs and only the back four coils. Why they didnt change the other four beat the hell out of me. They want me to take back. But when I got back I want to have some knowledge so they don't try to pull another fast one on me. If anybody seen this same problem please let me know thanks.

 

what type of loud sound does it make?

 

After the first time I took it and payed but did not get any improvement, I would have made sure the service manager went on a test drive with me on the second visit!

If you do go back, make darn sure you get that service manager to take a test drive before you pay!!!

 

it sounds like if i got header in the bottom of my truck. But like i said it only in that speed 40-50 mph

 

That was the problem when i took it the first time. i was waiting for like 2 hrs. Then i start bitching. they were force to give me a rental car. 4 days do. This time i ain't leaving until they give me a good answer. but i wanted to know if any body else had or has this same problem.

 

Change your plugs and coils. This was a much talked about problem awhile back and it always came down to plugs and coils. Worked on mine as well.