Car trouble

[CLO]

I drive a 97 ford explorer, cars a fucken champ, its got about 140 grand miles on it and its allways ran nice and smooth

but recently, it started about 2 days ago, when i drive above 30 mph, and lay of the gas to coast the rpms will get under about 1000, this load fucken noise from the engine will erupt, like it sounds like a chainsaw is goen off, and the second i tap the gas, the noise goes away, but once i lay off again the noise will come back. its only when im coasting above 30 mph

I am honestly flabbergasted by this and if anyone would know anything hit it up

 

[biG_EaSt]

prolly somethings busted in the internals maybe piston or rocker you should prolly get it check out tho so you dont cause more damage

 

[invader7]

yeah its something pretty important. id get it checked out.

 

[Inbred_Redneck]

Could be a fucked piston seal, or just the piston in general. But I'd get it looked at, it sounds pretty serious.