In June I noticed a noise from the engine. I'm wondering if anyone can help with tracking it down. I suspect turbo impeller. This is my first forced-induction vehicle so I appreciate any insight:
There is an audible, rotational metallic grinding noise after low load in the first, second and third gears. EDIT: it could be present in higher gears but road and wind noise drown it out. It occurs low in the RPM range, and is most prominent after letting off the gas.
Now, I don't know a ton about turbos, but to me it feels like if you give the car enough gas to start start the turbo to spool and then let off, that as the impeller begins slowing down again, it is wobbly/loose and grinding around. Doesn't really sound like any debris rattling around, just like a rotational grinding. You do not need to add enough gas to generate any noticeable boost. Imagine the amount of gas you'd use navigating a parking lot. These are the speeds and amount of throttle needed to generate the noise.
I tried to take a video while in a parking garage and will upload it tonight.
I asked Ford to look at it while they did some brake work and they said they couldn't hear anything. I took the head tech (pretty sure that was his title?) for a drive around the lot and tried to show him the sound and after talking to some of his techs he told me that there was nothing wrong, and that when turning + accelerating under low load/low speeds, that you need more power and that the turbo kicking it is normal. Which may be true, but the sound is not "clean" or good, and certainly wasn't present when I bought the vehicle. He told me to continue to drive and monitor it and if it got worse to notify them.
I am 99% sure this is any sort of resonation/vibration issue at a certain RPM range. It sounds like a mechanical wear noise.
Here are the details of the vehicle:
2014 FiST, about 26,000 KM on the odometer (16,000 miles).
Mods that might play a factor (Aside from the slightly more aggressive OTS tune as a catalyst, I don't think they'd generate this noise?):
COBB AP 91 octane tune (vary between 91 octane and 94 octane fuel (Chevron gas))
mountune high flow induction hose
mountune short shift kit
mountune roll resistor
boomba racing shifter base bushings
Any thoughts?
There is an audible, rotational metallic grinding noise after low load in the first, second and third gears. EDIT: it could be present in higher gears but road and wind noise drown it out. It occurs low in the RPM range, and is most prominent after letting off the gas.
Now, I don't know a ton about turbos, but to me it feels like if you give the car enough gas to start start the turbo to spool and then let off, that as the impeller begins slowing down again, it is wobbly/loose and grinding around. Doesn't really sound like any debris rattling around, just like a rotational grinding. You do not need to add enough gas to generate any noticeable boost. Imagine the amount of gas you'd use navigating a parking lot. These are the speeds and amount of throttle needed to generate the noise.
I tried to take a video while in a parking garage and will upload it tonight.
I asked Ford to look at it while they did some brake work and they said they couldn't hear anything. I took the head tech (pretty sure that was his title?) for a drive around the lot and tried to show him the sound and after talking to some of his techs he told me that there was nothing wrong, and that when turning + accelerating under low load/low speeds, that you need more power and that the turbo kicking it is normal. Which may be true, but the sound is not "clean" or good, and certainly wasn't present when I bought the vehicle. He told me to continue to drive and monitor it and if it got worse to notify them.
I am 99% sure this is any sort of resonation/vibration issue at a certain RPM range. It sounds like a mechanical wear noise.
Here are the details of the vehicle:
2014 FiST, about 26,000 KM on the odometer (16,000 miles).
Mods that might play a factor (Aside from the slightly more aggressive OTS tune as a catalyst, I don't think they'd generate this noise?):
COBB AP 91 octane tune (vary between 91 octane and 94 octane fuel (Chevron gas))
mountune high flow induction hose
mountune short shift kit
mountune roll resistor
boomba racing shifter base bushings
Any thoughts?