Kia Troubleshooting Questions? Ask a Mechanic
I have never noticed a laboring problem or bogging down at these speeds, so if it is it's minimal. The only other issues I've noticed, are if I have to accelerate quickly it hops when shifting from 2nd to 3rd. The loss of acceleration at high speeds has happened one other time on that incident I pumped the gas about 3 times and on the third pump it hopped and began accelerating again. both times I was @ a quarter of a tank or lower. Seems like there would be some connection with fuel. Some research I've done states a fuel filter and separate fuel strainer. the fuel strainer is in the tank, but some research states there is also a non serviceable filter under the wheel well. my maitnance schedule states the fuel filter needs to be changed every 30,000 miles or so. But I can't find it
That is why I'm wondering if it could be an issue with the fuel pump or strainer. Like you stated there are only the 2 codes pulling which are both for the cat. Just trying to narrow down the field of possible causes. It doesn't seem to be misfiring, and I'm not sure how it could be wrong gear on an automatic w/slapshift manual (if that makes sense). When it acted up this last time, I started losing speed while in D, when I kicked it over to slapshift once in 4th gear could maintain 60 but not accelerate past that speed. Yesterday after starting my car after it sat for a week once it idled for about 10 min, I noticed a hot or burning belt smell. when I popped the hood there was a small amount of smoke then it went away in about a min along with the hot belt smell. Possibly from sitting? Same smell again later that day when I gunned it to see if I could recreate any symptoms but no smoke.