Q: Engine surging and has a loud noise in Sport mode.
Hello, I'm experiencing engine surging with my vehicle as well as a weird loud growling noise in Sport mode
I had posted my question on here and had it answered with the assumption it was the MAF sensor. I had cleaned that and still no luck. The sensor itself seems to be in good shape with no defects that I can see or debris. Just trying to figure out what would cause the engine surging other than the MAF. I'm feeling a vibration everytime the RPM dips up and down when the engine is cold or warm. I noticed when I give the car a good amount of throttle when entering a highway, the vehicle feels like it is bucking or jerking back and forth while the RPM is slowly climbing up.
When I throw the vehicle into "S" Mode or Sport Mode, I hear a loud growling type of sound right before it changes gear but before it reaches the RPM that it is suppose to change gear, the sound is not there. In D mode, I do not hear that noise at all.
My car has 112000 miles.
My car has an automatic transmission.
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Hi there. Check the idle air control valve (IAC) and see if its working. The IAC controls the engines idle and operation. If the engine is surging, then there is a good posability that the IAC valve may not be working properly. If you need further assistance with your engine surging, then seek out a professional, such as one from Your Mechanic, to help you.
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