Hi, i have a 01 F-250 with the 5.4. It makes a weird sound when you accelerate at lower RPMs. I had a Tundra with the same noise. It had a bad exhaust manifold. Pretty much all the 4.7 Yotas did. Do the Fords have this problem too? Headers fixed the Tundra. Helped performance and sound too. Do you think this is the problem?


Or, if you think its something else, what do you think it is?

 

YEP, mine (and many others) have the same problem. I haven't thrown new headers on yet....I MAY tackle it this winter, but highly doubt it LOL. I have a mechanic that might do it for 4 hours labor, $60/hour.

debating on which headers, or just manifolds (bad idea considering the dual exhaust, CAI and tuner I have)....