When I turn my truck on and it’s just sitting there I’ll hear this bad knocking sound and it sounds like it’s in intervals. It’s somewhat louder when I start moving but once I get to like 10 mph it’ll stop. I do work in quarries so that might help. Thanks

 

More info, like which engine, how many miles, service record---

 

it’s got 95,000 miles, 2011 Ford ranger, 4L engine, was always garage kept and maintained well before I got it 2 months ago