Engine running rough at idle?

prizestuff

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Hello,

This has been happening ever since I bought the car second hand at a dealership. The RPM gauge bounces around at idle.

https://www.youtube.com/watch?v=vV2Q5PvTKOg

Also, I seem to be getting consistently bad mileage read outs.

14L/100KM - 16L/100KM

Is all this normal for my car?

Also, the traction control and another system seem to like to randomly come on and say to service them. After a while that goes away.

Normal??

Thanks!
I know i'm new here, hi!:D
 
Hi Merry Christmas, how many miles does your car have on it? Does it still have any fort of warranty provided by the dealership?

You should start by having your cars computer scanned for trouble codes?

Look under the hood for anything obvious also check all the fluids including the engine coolant while it is cold.
 
Hey!

Merry Christmas to you too!

I think about 150,000km and no, no more warranty left. Some parts have it though. I think the mass airflow sensor and throttle body. Some parts of the fuel system as well as the spark plugs.

All the fluids check out, the engine looks alright. It's been a weird car to own for sure. But only had one previous owner that traded up so I don't think it was mistreated. It enjoys P0171 usually but I haven't had it read in a while. (Usually got onstar to give me the codes)
 
I believe the code your referring to indicates a lean mixture, I would start by inspecting for vacuum leaks, a clogged fuel filter. if it has had work done to the mass air flow and the throttle body. recheck that work for less than desirable repairs. look for over tighten end bolts or leaking gaskets etc.
 
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