oldVOR
forum member
Have had an odd noise on my '14 GT that is most prominent when the ambient temperatures are upper 80's or higher. When its cooler, the noise can not be replicated at idle or any rpm without load. When driving, the noise can be heard if its bouncing off a jersey wall or another vehicle while light throttle is applied. It does it with and without the AC running, however, it is more prominent with the AC running. It does it with and without the clutch engaged. I've used a mechanics stethoscope and noted the noise to be loudest at two points, one being the oil pan and the other being the clutch bell-housing with the oil pan being ever so slightly more noticeable than the bell-housing. The noise is loudest on the drivers side compared to the passenger side. There does not appear to be any consistency or rhythmic pulsing with the noise.
The engine runs fine and makes power throughout the RPM band. The noise disappears while sitting still and slowly increasing the RPM past 1600-1700. The noise is present under light throttle with load and either stops or is drowned out when moderate or full throttle is applied. I've run 6-7 autocross events this year and the engine has performed flawlessly the entire time.
I've had it at the dealership and they can not replicate the sound. Primarily because they don't get the engine hot enough or wait until the hottest part of the day to perform their diagnostic tests.
The engine has ~11,500 miles with a Steeda CAI, Steeda tune and Borla axle backs. Other than these items, the 5.0 is stock. I've had oil analysis performed with each oil change and nothing unusual shows up on the reports.
The noise sounds like the discharge from a piezo-electric igniter on a gas grill. It was hot enough today that I was able to capture the noise after the drive home from work.
https://photos.smugmug.com/photos/i-9Z42L6B/0/c0c68672/1920/i-9Z42L6B-1920.mp4
Any ideas or things to look for/check?
The engine runs fine and makes power throughout the RPM band. The noise disappears while sitting still and slowly increasing the RPM past 1600-1700. The noise is present under light throttle with load and either stops or is drowned out when moderate or full throttle is applied. I've run 6-7 autocross events this year and the engine has performed flawlessly the entire time.
I've had it at the dealership and they can not replicate the sound. Primarily because they don't get the engine hot enough or wait until the hottest part of the day to perform their diagnostic tests.
The engine has ~11,500 miles with a Steeda CAI, Steeda tune and Borla axle backs. Other than these items, the 5.0 is stock. I've had oil analysis performed with each oil change and nothing unusual shows up on the reports.
The noise sounds like the discharge from a piezo-electric igniter on a gas grill. It was hot enough today that I was able to capture the noise after the drive home from work.
https://photos.smugmug.com/photos/i-9Z42L6B/0/c0c68672/1920/i-9Z42L6B-1920.mp4
Any ideas or things to look for/check?