Date: Fri, 21 Mar 2003 13:20:30 GMT From: "Fred W." <Fred.Willsnopsamammyrealbox.com> Subject: Re: Switching to DI
"Goran Larsson" <hohnopsamlid.invalid> wrote in message news:HC2JoM.6wMnopsamove.se... > In article <3e7983b3$1_1nopsamntp-2.news.uk.tiscali.com>, > **-** <youknownopsamuknow.me> wrote: > > > Any reason for this? Does the DI talk to the Fuel ECU? > > Input signals to the DI are triggers for the sparks, i.e. the DI > needs something to figure out when to fire the spark plugs. > > The DI cartridge also signals the ECU when it detects knocks (takes > the job of the old knock sensor microphone) and ionisation (i.e. it > detects that combustion has taken place). > > Early DI cars (in 1988, called DI/APC) used a control box combining > whatever was needed to drive the DI and to perform the APC functions. > The fuel ECU was the same as for pre DI cars. Correct, assuming that we are talking about a turbo engine. Otherwise what would you need and APC for?