So this is a 2007 mustang GT/CS. It is 99% stock. 78k miles. I was driving home and stopped to get gas. Drove it home. Parked it for a week. Started it the other day and it made this sound. This car has had 2 previous owners and there are zero signs of rough driving or abuse. The first 6 or 7 seconds of the video are normal sounding and then at about 8 seconds the knock/tick/ping sound starts. Could this be just bad gas? Or maybe bad spark plugs? It has about 2500 miles since the last oil change and is still full and looks super super clean.
Previous owner put on a CAI and one of the 2 previous owners replaced the H-pipe with an X-pipe. No other mechanical mods. It does have a sub/amp and an aftermarket head unit.
I do believe the spark plugs and sires/boots are original.
What are some things I can do first to rule out the easy options? The gas tank is almost completely full of this gas and I am a little scared to drive it so I can put new gas in it.
Previous owner put on a CAI and one of the 2 previous owners replaced the H-pipe with an X-pipe. No other mechanical mods. It does have a sub/amp and an aftermarket head unit.
I do believe the spark plugs and sires/boots are original.
What are some things I can do first to rule out the easy options? The gas tank is almost completely full of this gas and I am a little scared to drive it so I can put new gas in it.