Sounds like you are getting crappy gas mileage. If you are only getting 14mpg then you would only get about 200 miles on a tank. You mention how many miles you are going but not how many gallons you are putting in at fill up.
The brochure also says 13.7 gallons. And BTW do not continue to fill the tank after the pump clicks off. You can, and probably already have, damaged the canister system that grabs the fumes to be burnt off later. I know there is a tendency to want to get the last drop of gas into the tank but resist the temptation. It will even out.The official Kia Motors website says that the gas tank in the 2.4 SX (my car) is 13.7 gallons. This cannot be possible, because no matter how much I fill the tank, I can't even squeeze 200 miles out of it. Most I've ever gotten out of a complete fill-up was 192 miles, and that was only after I literally squeezed so much extra gas into the tank that it was pouring out of the side. So, my question is, is the tank really that small, or is it another problem like the spark plugs? Or the sensor? Thanks in advance.
I'm wondering if you have a computer problem of some kind where it is running in "limp" mode or something like that. I'm not wild about these modifications you did to your car. You will have a problem with getting this fixed under warranty should you press the issue. If it were up to me I would put the stock components in place and then lean on KIA to hook up their computer to see what kind of codes it spits out.Well I know that overfilling could actually have negative effects, that's why I only did it once. But I never let the gas run down all the way. I have no idea why I'm getting such mad mileage, I don't leadfoot. I hardly even depress the pedal. Last time I filled, it said I put in about 11 gallons, but it sure didn't feel like it, because I pressed the TRIP button to see how many miles to empty, and once again it said 192. As I began driving, not even a couple minutes went by before the number started gradually dropping. And it always does that. I don't understand why. I have a Magnaflow muffler and an intake in the car, BUT that couldn't even really be it, because even before I put those things in the gas mileage was still acting up. I've never gotten anything even remotely close to 300 miles out of a tank. The TRIP claims I'm getting anywhere from 16 to 26 MPG everyday, and it literally fluctuates like it's nothing. I'm thinking this is a deeper problem.
By the way, it's a 2.4 SX, and I've LONG since stopped driving tiptronic.
because I pressed the TRIP button to see how many miles to empty, and once again it said 192..
Wait are you sure your actually getting 192 miles? According too your ODOMETER? The trip computer can just say whatever, what matters is what your odometer is actually saying...
Do this OP....Fill up.....set your trip odometer to 0. Drive. Next fill up....take the miles driven, divide by gallons put in. That's your ACTUAL (non-computer assisted) MPG's.....see your dealer if it's wacky.