Hey all! New LR owner here, I've got an 08 LR3 with 98k miles.

Started giving me rough idle and a few codes a couple weeks ago (P0455, P0172, P0175). Changed the air filter, changed the oil, replaced the MAF sensor and cleaned the throttle body as well as replacing the fuel tank cap (said fuel cap loose or missing) and having the battery tested (working fine). My next ideas are to check the fuel pressure and replace spark plugs but I am quite the novice in vehicle maintenance and wanted to see if anyone had a better idea. Currently if I let it run for 10 minutes it will automatically shut off. Drives best just after filling up, quickly devolves to a pretty sputtery ride. There is also an occasional odd guzzling noise at the fuel cap while idling which I haven't been able to find any record of on these forums.

Any help is much appreciated thank you!