Over time and miles, your car might start to slow down. It might not accelerate as quickly as it once did; the engine may not run as smoothly as you remember, or the fuel economy may dip—but ...

Fuel injectors can get gummed up with dirt and fuel residue over time. Photo credit: David Traver Adolphus / Autoguide.com. Over time and miles, your car might start to slow down. It might not ...

Today's diesel engines have considerably more fuel injection pressure than diesels of the past. For example, early Stanadyne DB2 injection pumps push fuel out to the injector at 6,700 psi, while newer ...