Thank you, XXXXX XXXXX check for vacuum leaks on Tuesday. Can I use a can of Throttle body cleaner or will it only work with carb cleaner? Also, is there anyway to perform the procedures on the charts without A scanner? Also, what about the catalytic convertor, will the car run correctly with the cat cleaned out?
Thanks for the charts but I don't think you read my entire posting. I have already performed a back pressure test and I took off the short section of exhaust and found that both cats are completely empty.
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I'm ready to answer your KIA questions right now.
Hello, i see you have another open question about the same issue with your car. i have read through both questions and reply's from the other experts, and not to say that there answer's are wrong, but that first things first, with the codes you have is that the Cat's have been gutted out...... this one statement you made about both cats being gutted, and looking at all of your codes listed, in my opinion are more than likely all related.....the code p0170 is a generic code and not a KIA code, kia would be p0171 for lean and p0172 for rich. this lean or rich code could be a direct fault due to no catalytic converter cleaning the exhaust gases.
next codes i look at are the miss fire codes, since you have a p0300(multiple/random) and miss fire codes for all other cylinders, and you have good compression,this could be directly related to the first code you have the p0170 code.
I'll explain here..... the pcm detects the exhaust gases are far to rich, due to no cat. and it leans out the fuel mixture so severely to compensate, that this in turn creates a lack of fuel and horsepower that the pcm now detects a or think it detects missfires and counts them and sets the code for missfires. when actually the computer did this to itself.
I do not know if any of that made any since at all, but it all sounded good in my head.
First thing first. you need to install some cat-converters. reset the fuel trims to zero, and then test drive the vehicle, and see what codes return.....if any.
to reset the fuel trims, disconnect both battery terminals from the battery, and run a jumper wire from the + terminal to the - terminal for about 30 seconds.........this will reset the fuel trims in the pcm and clear most major faults.
reply for any further questions
Thank you very much for your answer. I feel that your answer was very professional and knowledgable. I am searching for new cats now, which I am having a very hard time finding. If you have any suggestions on where I can find them close to Albuquerque NM I would appreciate it.
Now i would like to be able to contact you after I install the new cat or cats. How can I do that if I rate your answer now?
I got one on order it should be here by the end of the week.
I installed a new Cat and reset the fuel trim and it ran a little better at first, but then the same problem came back and the engine light came back on. I swapped the TPS and MAF sensor with another "not new ones" and again it ran better again, but then the same problem returned. I took off the IAC and ran power directly to it and it opens and closes perfect with no hesitation.
I took of the top timing belt cover and both cams are as aligned as possible, the grooves are not exactly in the same position on each gear.
I took it to O'reileys and got the codes again. Same ones 507, 300-304.
Again, these are the symptoms:
- I will start the motor and it will run rough with some popping in the intake manifold and then the idle will clean up and run semi smooth. I can rev the motor and it will rev smooth.
- Put it in gear and it starts to sputter, try to accelerate and it will sputter up and then eventually clean up and accelerate until it shifts to 2nd gear, then it does it again in second gear but for less time. If I floor it the car may sputter and slow down or downshift and accelerate fine.
- After driving the car smells like it was running rich.
- For the most part when it gets up to speed the car seems fine, until I
get to a hill or I have to stop and restart.
- One more thing, the sputtering get worse and worse as I drive the car more, However, if I shut the car off and restart it, it will improve a for the first couple of time that I accelerate from a stop.