'03 Chugging Sound
My truck is making a chugging sound after accelerating, or sometimes during accelerating. It sounds like 2 to 3 air pockets escaping from the front left area of the engine compartment. This is a new sound to me, and just recently started after the truck sat for 3 months. I have checked the coolant level and it hasn't dropped any nor is their any residue around the degas bottle. Does anyone know what this is or what is causing this. The truck is a 2003 6.0. Any comments would be appreciated greatly and thank you in advance!