Hi everyone. I'm new here & am having issues with my car. I have a 2001 2.4L Santa Fe with around 160K miles & manual transmission. Recently it's been having issues with a rough idle, hesitation while driving, & extremely poor gas mileage. I've already changed the MAF & the TPS, & that cleared up the issues for about a month. Just this weekend, after a long drive out of state, the issues started back up but with no CEL. There are no vacuum line leaks, a new purge valve, new plugs & wires, new air filter... My gas mileage dropped from around 300/tank to around 140/tank. I'm stumped now, any help would be great.