Direct-injection engines were introduced with a promise that sounded ideal: more power, better fuel efficiency, and cleaner ...

The basic difference between direct injection (DI) and the port-fuel injection (PFI) systems we've become familiar with since the mid-1980s is that PFI sprays fuel into the intake manifold (behind ...

Carburetors are old news. We've moved on to electronic fuel injection long ago. But of the two main varieties of fuel injection, port and direct, there hasn't been a clear winner as of late. Both ...

For most of us, the chief requirement for aftermarket direct-port electronic fuel injection is the elimination of the after-installation hassle factor. We anticipate ...