was driving my 82 6.2 liter diesel to the lake the other day and it was running perfectly fine. I parked then when I went to leave it cranked for a second then died... Wouldn't start... Finally after a bit of trying it cranked so I drove it and it was surging, thinking I was low on fuel (it wasnt) I stopped at a gas station and it wasn't only took 4 gal. Took off and it was running rough, so I assumed it was the fuel filters... Changed both out and was hard starting but cranked and was running smooth for a few minutes then it started surging again, so I took it home. Which leads me to today... Didn't want to start... So I pulled of the air filter and noticed this (Photo) at the back of the intake and hadn't noticed it before and I have no idea what it is... Looks liked it popped out? Any and all help would be appreciated... Im at a loss and need it... Thanks for your time