Idle rough 97 kia sportage

Well as it is running I would start looking for either a vacuum in the wrong place or not hooked up at all and definately make sure all ground wires and back where they need to be but either way start with a big vacuum leak if no then it appears the throttle position sensor switch is most likely installed wrong or you need to do a complete TPS reset so it will re learn the proper idle speed also look to see that a wire or something else is not binding the throttle linkage forcing the rpms to high. Makes sure you start with the most likely reason then go from there. And If I can help further just ask

Get the right TPS. Some are clocked differently.

All of this suggests bad sensors. I would check the engine codes and try again!

The vaccuum line might have come off or may have broke.

Probably valve cover gasket. This oil does not affect operation other than to smoke a bit. Idle and power issues are unrelated to oil. Unless it is missing, power and idle may be fuel mixture issue. Is the engine light on? If yes, get a scan at autozone or advance and report the codes to us. If no engine light, clean throttle plate and airflow sensor with carb or electric parts cleaner. Clean any other parts that have gas flow, such as PCV and EGR valves. Let me know if you have more questions.

I would check the connectors on the coil packs, spark plugs and wires and replace them if they at all seem worn or tired. My 2000 sportage ran rough so I replaced the fuel filter, coil packs, spark plugs and wires, cleaned out the IAC valve, TPS, throttle body and intake tube, tightened the screws on the fuel pump access door under the right rear seat and cleaned the ground wire and the contact surface and I added 1 ground wire from the block to the firewall and 1 from the valve cover to the firewall. Your timing is more than likely right where it needs to be but the ignition may be slightly missing from a bad coil pack, dirty or fouled plugs or a bad plug wire.

These are really quite easy to do just time consuming. 1. remove the air ducting from the air box and throttle body 2. remove the accelerator cable and kickdown cable(if equiped with auto trans) from the throttle body 3. remove the 4 bolts from the throttle body and be careful to not ruin the gasket upon removal 4. remove the black cover from the rocker cover(valve cover) 5. remove the 2 coli packs and the spark plug wires. 6. remove the 4 spark plugs. Use NGK or Nippon Denso plugs and gapped at .032". Let me know if you need anything else.

Clean the idle air control valve in the throttle body and you should also check fuel pressure and test the throttle position sensor. Another thing that you will want to do is to check the timing.

Yes there is a sensor that controls Fuel/air ratio.It's called a MAF (mass air flow sensor)
But I think you should have the EGR (Exhaust gas recirculation)valve checked
and The TPS (throttle position sensor)maybe dirty.

Although may things can cause this issue,I would look at the items above first.


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You might want to go to your local AutoZ to have them hook it up to a code reader and give you any trouble codes that may exist, but chances are you problem is going to lie with one of three things. The first thing I would check is the Mass Airflow Sensor(MAS). The MAS sensor is usually connected to the plastic breather tube that runs to the air filter. The next thing I would check would be your Idle-Air Control Valve. Not too sure where Kia put their IACV's at, but AZ's website should have vehicle specific repair info through Alldata for your Kia. The last thing that I would check if you still haven't fixed the problem would be your EGR valve. Other than that, the only other thing that I can think of would be your throttle positioning sensor, but this possibility is least likely. Hope this helps guide you in the right direction. Have a great day!