I have a '97 F150 with a 4.6 engine. I have noticed at engine start up, an exhaust leak which seem right under the drivers floor board. It seems to quiet down after several minutes but is still there. Tonight it did the same, I had the truck off for about an hour and then started again and it was LOUD. But it was really only loud under acceleration. It seemed to quiet down quite a bit after several minutes. I am assuming it is due to the exhaust pipes expanding/contracting. But I have had this truck for several years and it has never done this before.
I tried to get under the truck but could not pinpoint the location. I also took a stethascope tool and could not pinpoint the location.
I know a lot of owners mentioned there is serious issues with the manifold or bolts on this model.
Can somebody elaborate for me......
Thanks !