Fan sound when stepping on gas pedal

ANSWER : Hi there:

There could be multiple issues causing the rattling noise when you accelerate on your Mazda 6 ranging from a loose bracket, to an exhaust pipe that is cracked or even the serpentine or drive belt system that’s causing these symptoms. It’s also possible that motor mounts are starting to show signs of wear. The only way to really know for sure what’s causing this issue is to have a local mobile mechanic complete a car is making a noise inspection.

ANSWER : The noise could be anything from exhaust leaks to accessory drive problems or internal (valve train for instance) faults. It is possible that diagnostic trouble codes have set and a mechanic should attempt to retrieve those first using an appropriate scan tool. If there are no trouble codes if you were to request a diagnostic from YourMechanic, the protocol is pretty standard: a certified mechanic will test for ignition, fuel system, air induction and/or engine sensor problems and these possibilities are tested, in a sequence, using a diagnostic "decision tree". Often, the problem is limited and straightforward, that is easily repairable. There is a good chance of that so I recommend that you request a rough running diagnostic and the responding certified mechanic will travel right to your location and get this diagnosed and resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

ANSWER : Fuel pumps rely on liquid gasoline for cooling. Consequently, it is recommended to keep the fuel tank at least 1/4 full to prevent the fuel pump from overheating. If the pump is run to the point of being dry, the seal on the impeller can overheat and get damaged. Even if the pump subsequently runs, as you report your does, it cannot develop enough suction to pick up fuel due to the seal damage. That is possibly what has happened in your case but it should be confirmed prior to replacing the fuel pump. In your circumstance the recommended service is fuel pump replacement but if you request that, the responding certified mechanic will do enough tests to confirm that there is no other possible explanation for the failure. There is a quick and direct way to determine if the problem is lack of fuel. Procure a can of "starter fluid" from any department store. Using the material cautiously (it is highly flammable; keep away from flames or sparks), introduce some of the fluid into the intake of the engine while you engage the starter motor. If the vehicle starts and runs briefly, then you know for sure the problem is fuel starvation of course almost undoubtedly caused by the pump failing. Fuel pump replacement can be accomplished in the field, right at your location, if you desire that service.

ANSWER : Hello. If the noise occurs when you accelerate then it sounds like it may be a timing chain problem. Being that this engine does not have a fan the noise typically comes from the timing chain. It may be from low oil or from a chain failure. I typically start by removing the engine drive belt and starting the engine to see if the noise is gone. If it is then it may be one of the accessory pulleys. If the noise remains then it is the timing chain. If you are going to have this checked, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the noise and recommend an appropriate repair.

ANSWER : Hi – your Impreza has a turbocharged engine for enhanced performance. This produces pressurized air for the engine, increasing power. To avoid over-pressurizing the engine, there are boost pressure controls, and a "waste gate" port to vent over-pressure – all electronically controlled. This can produce "chirping-like" noises under acceleration, especially during and after gear changes for manual transmission cars. This is normal behavior, and shouldn’t cause concern. If it seems excessively loud, I would recommend an engine inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

ANSWER : Hi there. If a battery cable is loose or corroded the computer and components in the vehicle will shut down some circuits that are unable to get a good connection. If the vehicle makes the issues again then I recommend seeking out a professional, such as one from Your Mechanic, to help you to diagnose an electrical issue that may be occurring.

ANSWER : Hi there:

In many instances, a humming noise will be caused by a loose serpentine or drive belt, the power steering pump (which the other mechanic determined wasn’t so) or even a vacuum leak perhaps within the EVAP or EGR emissions system. However, since all of these would be guesses, it’s best to have a professional mobile mechanic complete a car is making a noise inspection first, so they can eliminate the guess work and determine where the noise is coming for; and the right repairs can be made.

ANSWER : It’s possible to have someone alter the brake pedal or adapt a brake pedal from a different vehicle. You may call around to some customization shops to see if anyone is interested in taking on the project. But first, I would try reaching out to the selling dealer with your concern – especially since it is a new model. Good luck.