That doesn’t mean you’re out of luck, though, especially if you’ve got scrap galore and a DIY spirit, as this junk bin fuel injector test stand ably demonstrates. [Desert Rat Racer]’s test ...

While modern cars will throw a check engine light if the fuel-to-air ratio is off, some older cars won’t, so look out for the aforementioned signs of backed-up injectors. You can’t usually ...

It will then flow through your fuel system, cleaning the fuel injectors and other components along the way. The manufacturer recommends using it every 1,200 miles or so. Key specs: Check Latest Price ...