difference between cadillac cts sidi and the sfi


Asked by larryd0505 Aug 05, 2012 at 10:17 PM about the 2009 Cadillac CTS 3.6L SIDI AWD

Question type: General

1 Answer

Joseph Kopacz

DI means Direct Injection of fuel into each cylinder, much more efficient and powerful use of fuel. SFI means Sequential Fuel Injection which means that while each cylinder has a fuel injector they fire into a intake plenum (manafold) sequentially much like Multi point Fuel Injection (MPFI) but which only fires in banks. DI is the only way to go.

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