Q: Engine surging and has a loud noise in Sport mode.

asked by on December 31, 2016

Hello, I'm experiencing engine surging with my vehicle as well as a weird loud growling noise in Sport mode

  1. 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.

  2. 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.

Engine hesitates during acceleration Inspection $79.99 - $89.99 Get a Quote

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

2008 Trailblazer motor mounts

It is possible that your transmission mount could be worn out as well. I would recommend having the transmission mount checked by using a large pry bar to lift up on the transmission at that location. If the transmission will...

Making a ticking noise when ideling

This may very well be a slight bit of excess valve train noise. Your car should have the timing belt replaced around every 60,000-70,000 miles. If it is possible that you may have put that many miles on the car...

Wheel bearing going bad

A wheel bearing noise can be identified by a loud growling noise which can get louder with increased speed. A failed bearing can also be identified by jacking the vehicle up and checking for play or movement in the suspected...

All my exterior lights work (brake, signal, hazard, reverse, etc.) EXCEPT running tail lights

If you are certain all fuses are good/tight, grounds are good and all bulbs are correct in voltage for the vehicle, I have a suggestion from personal experience with a MK 5 Jetta sitting right outside. Make sure the front...

Car shaking vibrating - 2008 Mercedes-Benz E350

Hello. From what you describe it would appear that your vehicle is experiencing some sort of engine performance issue that is also causing vibrations. If there are issues with the engine that cause misfires, the vehicle may experience a loss...

Car making thumping sound

A thumping is most likely coming from the front rotors being warped, and the pads jumping back and forth in the caliper while braking. The rotors and pads should be inspected and replaced as a set; putting new pads with...

Why does my Car idle at 1500 and struggle to go faster than 25mph.

When the check engine light (CEL) illuminates, and stays on, you should have the engine problem diagnosed in a check engine light diagnostic. An illuminated CEL means that the computer controlling the engine has detected a fault or faults. If...

MY truck wouldn't start this morning after several attempts, now it does. What could have been the problem.

Hi there. From the description you have provided, leads me to believe the slow and no crank may be, a battery and/or battery connection issue. It could also be, a faulty starter relay or starter concern. Proper diagnoses should be...

Erratic Idle

Hello! It sounds like you may have a dirty or faulty idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds...

Related articles

The Best Used Cars to Buy If You're a Pizza Delivery Guy or Gal
If If you deliver pizzas, you want to be sure that your car is reliable and won’t break down. After all, you have hungry customers waiting, and you don’t want the pizza to get cold. You want low gas mileage,...
Why Does My AC Rattle When I Turn It On?
Common reasons why a car AC system makes a rattling noise is due to a failing AC compressor, worn serpentine belt, or worn out AC compressor clutch.
How To Troubleshoot a Car That Makes a Whining Noise When In Gear
Whining is a common car noise that cars make when being shifted from gear to gear. Test your car in different gears and check the fluids.