Got another one for you Team.

2013 Mustang 3.7 Automatic

I could use your help cause whatever this is it’s deteriorated my fuel economy, power and over driving experience I had with this car initially.

I will list first what’s been done. Then I will proceed with the summary.

• Throttle body cleaned
• Spark plugs replaced (Fitment triple checked)
• VVT Valves replaced

The car is bone stock. Began about 4 months ago. It was very faint and has become louder. In that time...

Rod Knock? Fuel Injector? Lifters?