What's the best way to supply fuel to a wet nitrous oxide system on a multi-port EFI engine? Q:I have a 1992 Olds Achieva with a highly modified W41 Quad 4. It has been fortified with forged Eagle ...

For the casual enthusiast, the romance of lifting the hood of your project car and swapping that old-fashioned carburetor for high-tech electronic fuel injection (EFI) was often shattered by the ...

This month we wanted to test electronic fuel injection (EFI) again. But this time we wanted to use a throttle body injection (TBI) system like the ones that came stock on GM trucks for many years, ...

Port fuel injection (PFI) was a major milestone in the early '80s. The integration of PFI rapidly changed the way fuel was delivered by increasing fuel economy and improving engine performance. Even ...

Anyone who has gone to school to learn how to repair engines of all types, such as myself, will have learned the fundamentals of how they work. It's crucial for troubleshooting and diagnosing engine ...

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 ...