Not a really a DIY but just a little 30sec vid on listening to your injectors.
Tool used here, is a Steelman Wireless Chassis Ear which I bought from the USA/Ebay. It comes with 4 wireless remotes which can be clamped around the car whilst being driven and noises can be identified. Here I am clamped onto a long screwdriver to reach to the injector body. You can listen to injectors with a mechanics stethoscope for a fraction of the price of course or even through the screwdriver itself but this tool lets an audience hear the noise.
Injectors
https://www.youtube.com/watch?v=YyInI-tKUyk
Tool used here, is a Steelman Wireless Chassis Ear which I bought from the USA/Ebay. It comes with 4 wireless remotes which can be clamped around the car whilst being driven and noises can be identified. Here I am clamped onto a long screwdriver to reach to the injector body. You can listen to injectors with a mechanics stethoscope for a fraction of the price of course or even through the screwdriver itself but this tool lets an audience hear the noise.
Injectors
https://www.youtube.com/watch?v=YyInI-tKUyk