Last week I replaced the engine air filter in my 2022 Spark. The first time I started it after the change, I noticed that my RPMs were revving higher than normal. This morning, when I started the car, the RPM shot up to 3 and stayed there for a bit before dropping. I’ve also heard a popping noise that sounds almost like a backfire, but it doesn’t happen every time. When the engine is warmed up (for instance, if I run into a store and then come back out to start it again), I don’t notice the elevated revving.
Could this issue be related to replacing the engine air filter? My only thought is that we might have left a gap somewhere, leading to an air leak. The engine also sounds louder while driving. I haven’t experienced any issues with speed or acceleration/deceleration, just a strange startup.
My first question is how dirty or clogged was the old filter?
It’s possible that the new filter has significantly better airflow (I recommend using Bosch filters as they are the safest choice). I’ve used both the standard Bosch filter and a K&N round sport filter, and with the K&N, I noticed I could hear much more of the engine processes during starting and shutting off.
I have a 2011 model, and during cold starts, it also keeps the RPMs above 1000, dropping to around 800 when it warms up a bit. The “choke” opens slightly to prevent the engine from stalling due to the cold start. This is similar to how I keep my bike from stalling when cold. Once the engine is stable and warm enough, I would adjust the choke down to let it idle. While this is based on a carbureted engine, I assume the Spark’s engine would do something similar but automatically. If I’m mistaken, please correct me, as I’m still learning.
My Spark tends to high idle for a while when it’s cold, then it slows down after warming up. In the winter, I usually let it sit until that process finishes before driving since it gets cold here.
Regarding the new filter, the computer may need some time to re-learn with the proper airflow, but that shouldn’t take more than a couple of drives. I’d recommend checking the new filter to ensure it’s installed correctly and that there’s no plastic wrap on it. If the issue persists, it might be a good idea to consult a mechanic, as this seems unusual.
It’s still a modern vehicle equipped with airbags that will deploy in the event of a collision. I think that’s one of the key safety features, along with the crumple zones.
The salesperson I talked to while shopping mentioned that she was T-boned in her Spark. The car was a total loss, but she walked away without any injuries.
It seems like the intake tube might have come off the throttle body while you were changing the filter, or the mass airflow sensor could be unplugged. Do you have a check engine light or any codes?
Since everything else has been addressed, ensure that the airbox is securely closed and that all wires and hoses are properly connected.