Hello all,
I have been experiencing some weird issues with my 2013 Audi S5 recently and hope you guys might be able to help! So here is the issue I am having:
When sitting at a stop, sometimes (not always), my car idle will go up slowly to 1500rpm. While the car should sit at a nice ~500rpm at a stop, it slowly goes up and then hangs around 1500rpm until I give it a little gas and then it drops back down to 500rpm. This happens both when the engine is warm or cold (no difference). It also happens if I am in Neutral or in Gear. Having A/C off does not solve the issue as well.
As a note I have a RocEuro Cold Air intake on it. I thought this might be the issue so I cleaned the filter with K&N filter cleaner and reoiled. I made sure that the hose clamps were tight and properly fitted as well. The issue still was there. The intake and lowering springs are the only current mods on the car.
So I took it to the dealership for warranty and they said that the car is throwing throttle body adaptation errors. They said they re-zeroed in (possibly wrong term?) the throttle body but it did not help. They want me to put a stock air box back in, but I don't have it (didn't come with the car when I purchased) so they want me to buy it brand new. Is it really possible that a cold air intake that many people use here on the forums could be causing this issue?
NOTE: Also as a side note, about 15 seconds after turning the car on, it sucks a bunch of air in (makes a loud sucking noise). I think this is normal as I have seen other Audi's do it as well?
Any ideas as to anything else it might be? Any help would be greatly appreciated.
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