Should work, how accurate it would be I dunno though.
The CFI amd MPFI setups use the same two-pulse system.
MPFI one pulse operates 3 injectors, 2 pulse operates the other 3. Cfi, one pulse per injector.
Since AFAIK the computer uses a set value to tell it how much fuel was run through on each pulse, you may find it thinks you're using slightly more fuel than you were.
Or, it might be accurate. Each CFI injector should theoretically flow as much in one pulse as 3 MPFI injectors.