The former typically involves (or at least should, if done correctly) hooking up a bottle of cleaner to the engine’s fuel-injector rail, shutting off the fuel pump by removing either the fuel ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. Fuel injector cleaner serves an important function in ...

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