Kia-Forums.com is owned and operated by AutoForums.com, Inc. Kia-Forums.com is an enthusiast website dedicated to the discussion of Kia Vehicles, Kia Family Cars and Kia SUVs. Kia-Forums.com is completely unofficial and is not endorsed in any way by KIA Motor Corp, its affiliates, or its subsidiaries. KIAź is a registered trademark of KIA Motors Corp. in Canada, the United States, and in other countries around the world. No challenge to the status of KIAź's registered trademarks is intended.
Hello; I'm not new to the forums, I had to change my registration because I forgot my password and have since changed my E-mail address so anyway. I have a 2000 Sportage EX and I have a misfire when I pull away from a stoplight or after backing up. Its when the RPM's drop below 1000. If I keep my foot on the gas and keep the RPM's up, it runs fine.
Here's the list of things I've replaced;
1) both coils, coil harness, plugs & plug wires (gaped at 30, then 40 no change)
2) battery
3) alternator
4) fuel pump, filter, pressure regulator
5) radiator, all hoses & heater core (unrelated but worth mentioning)
6) replaced belt driven fan with electric
7) Head resurfaced, valve job, head gasket
8) timing belt and water pump
9) added a rear swaybar and KYB shocks & struts (also unrelated, but fun)
I keep getting the famous MIL's;
P0300
P0302
P0304
They will go away for awhile then come back on. This thing is killing me, I hate spending more money on this car. Does anyone have any ideas?
Any ideas would be greatly appretiated. Thanks again. KZ
10) changed (before and after cat) O2 sensors (sorry forgot to list before) Just give me a short block and I've got a new motor. Where is the IAV? I'ts odd because it's only when you dip below 1000 RPM. If I sit at a light and drive two footed and keep the RPM's up while its in gear, It pulls away strong.
The Idle Air Control valve would cause idle speed problems, but not misfire.
For the misfire I'd look at the coils, coil wires and spark plugs.
Have you check the 'DTC' section on the KiaTech web site - they suggest things like vacuum leak and possibly bad PCV tec. some of which I would not have considered would cause misfire.
__________________ For service info register (free) with KiaTechInfo and click on 'Shop' on the left, and for elect schematics click on 'ETM'.
Quality and not quantity counts.
Sig image is 500X100 at 11.7 kb
Make sure your gas cap is on tight and it has a good seal. I know that sounds stupid but trust me, it's a big deal on the Sporty. Search the forum for "Gas Cap".
Make sure your gas cap is on tight and it has a good seal. I know that sounds stupid but trust me, it's a big deal on the Sporty. Search the forum for "Gas Cap".
Worth checking, but I haven't heard of that causing a misfire.
__________________ For service info register (free) with KiaTechInfo and click on 'Shop' on the left, and for elect schematics click on 'ETM'.
Quality and not quantity counts.
Sig image is 500X100 at 11.7 kb
Do a Fuel Injector clean first and see if the codes come back. If they do then start looking at the crankshaft sensor
__________________
2004 Kia Sorento
Tom Tom 720 GPS
Escort Radar detector
Front drilled and slotted rotors
K&N air filter
Chrome BMW kidney style grille
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Low idle misfire?
Linear Mode
