While fuel-injector cleaning is often recommended by shops and dealer service centers, it probably isn’t necessary unless it’s correcting a running problem. In many cases, just using a quality ...

CNET’s expert staff reviews and rates dozens of new products and services each month ... and you may never need a specialized fuel injection cleaner or cleaning tool at all.

Fuel injectors can get gummed up with dirt and fuel residue over time. Photo credit: David Traver Adolphus / Autoguide.com.

Cleaning Action: Fuel injector cleaners are formulated to break down and dissolve deposits within the injector and the ...