Dirty Fuel Injectors

[SouthBay Fuel Injectors]

Your right...there are many factors. Bad fuel, dirt or debris in your fuel system, varnish build up around the diffuser, not running the car, etc. The picture that I posted isn't typical, but believe me we do see plenty like this. As far as the fuel injector cleaners go, you have to be careful with them. They do work, however, it depends on the condition of the injectors and your fuel system. Whatever dirt breaks loose from the cleaner flows through the lines and ultimately gets into your injectors. It only takes a microscopic piece of debris to partially or totally occlude the opening. Also keep in mind that you're unable to visualize the end result...such as quality of spray pattern and whether or not the injectors flow within spec after using the cleaner.

Want to see something crazy, I'll post a video of a set of Marine injectors on our bench before and after service.