Hi I just bought a new 2010 Acura ZDX 3 months ago. Ever since day 1, there is a ringing or pinging noise coming either from the engine or below the car when I accelerate moderately/heavily. This is more apparent at 2000 rpm shifting from 3rd to 4th gear, or 4th to 5th, or 5th to 6th. The sound is even louder when climbing a hill. When the car is parked and I rev up, there is no noise. I've used Chevron 94 for the first 3 tanks of gas, but recently have been using 91 on Acura HQ's advice.
I've brought the car back to my Acura dealership twice. The tech and field engineer both heard the noise. They checked the heat shield and intermediate shaft but found nothing loose. They even added octane booster but the sound is still there. However I've received a phone call from Acura HQ that there is nothing they can do at the moment to fix this sound, and this sound would not hurt the engine.
I am not happy because when I test drove 2 ZDX demo cars, they did not have this problem. Especially in a $50K car.
Is there anything you can recommend for me to fix this problem? I really like the looks of this car, and I would like to keep this car long term.
Monday, February 7th, 2011 AT 10:01 PM