[ForteGT2]

I have a 2011 kia forte ex, every now and then (not every time) I start the car, it has trouble idling. When it turns over, the engine would catch but it would the keep its rpms low and sputter (almost like there is water in the gas, nut there is not) I keep my foot on the fuel and it starts to pan out the works fine, and then the car has no issues after thay. This don't happen all the time.



I also have a p200a (intake manifold runner performance bank 1) code with a O2 Sensor.



Would the that p200a code cause such a problem with starting? I know that a new vcm actuator could fix this code. But I would like to get the car starting properly first.

I have attached all the codes.


Any help would be great.



Thanks.

Your car is 11-13 years old. Parts are going to need replacing from age.

The starting problem you are having sounds a lot like the problems I've had on 2010 Fortes: Difficult to start and seems like fuel starvation problems. If the starting problem is happening once the car is warmed up (recently driven) then the O2 sensor could be the problem. If the starting problem happens after the car has sat overnight then the O2 sensor is not the cause - but should be replaced if you're getting a code for it. From experience, I suspect your MAP sensor needs replacing. The MAP sensor is critical for fuel control - especially when cold and the O2 sensor isn't hot enough to send a signal (ECM running closed loop). The MAP sensor is probably faulty (It's OLD!) but starts to work once it gets warmed up - and doesn't reach the parameters required to set a code.

If it were my car I would replace O2 sensor, and if that didn't fix the starting problem I'd replace the MAP sensor with a NEW FACTORY MAP sensor.

Keep us updated.

 

[ForteGT2]

Which O2 should I try? Upstream or downstream?

Are you getting a code for the O2 sensor? The code would tell you which O2 sensor is bad.

HO2S-1 (upstream) is used for fuel control.
HO2S-2 (downstream) is used to gauge the catalytic converter's condition.

If you are not getting a code why do you think there is something wrong with an O2 sensor?

 

[ForteGT2]

Sorry I misread your last post. I will put the code reading on in a day or so, it's my daughter's car and she is living away. But the starting issue has not happened in the last 2 days, but it has happened when the car is cold or warm.

Had a similar problem on my Granddaughter's 2010 Forte - hard start, sometimes no start - but cranked, rough idle, and poor gas mileage. No codes were present - 2 months later and it was driving my Son crazy. He finally ordered a fuel pump but before it came in the CEL illuminated and a code for the MAP was set. He cancelled the fuel pump order and installed a new MAP sensor and the car drives like new.

 

[ForteGT2]

This is sounding really similar to the problem I am having with mine. It will crank then die like its not getting enough gas. If I turn it over and tap the gas lightly it will idle really high for a few seconds then run fine. No lights on dash nor am I getting any codes. Could it be the map sensor?

Not being able to look at your car I can't be certain. The MAP sensor on these cars is critical to fuel control. Do you have a CEL or code stored?

SYMPTOMS OF A BAD MAP SENSOR - YouTube