[Diy_efi] RE: Dropping Subaru injectors for economy
five10man at commspeed.net
Tue Jan 31 14:05:50 CST 2006
He's going to have a MIL on anyway, when the PCM's misfire monitor
notices that the engine doesn't speed up appropriately when the cylinder
in question comes around in the firing order. The only way around this
issue will be to ensure that the misfire monitor's enabling criteria are
not met. IDK what those are for this particular vehicle; a Subie tech
could look it up.
John Smith wrote:
> Ideally you would have some sort of vavletrain control to minmize
> pumping losses on the inactive cylinders. Since nothing short of
> electronic valve actuation does, those dead cylinders will be like
> driving an air compressor. I think the resulting economy gain would
> not be worth the trouble. If your Legacy is turbocharged, this could
> actually be a dangerous thing to do if you lean out a cylinder under
> boost. If you did do it, you would also need to simulate the unused
> injectors or you will get a check engine light.
>> Message: 1
>> Date: Sun, 29 Jan 2006 21:01:31 -0500
>> From: "Lee M. Lemoine" <llemoine at gmail.com>
>> Subject: Re: [Diy_efi] 10hp injected turbo
>> To: diy_efi at diy-efi.org
>> <bedc2dea0601291801p51147461gbe80cd0f85d0f820 at mail.gmail.com>
>> Content-Type: text/plain; charset="iso-8859-1"
>> I just bought a 2006 Subaru Legacy GT Limited... 2.5 liter DOHC with
>> turbocharged and intercooled. I get about 17 mpg with a 5 speed auto
>> transmission, and a fair amount of jackrabbit starts (hey, i haven't
>> anything that pulls on me yet!)...
>> Either way, i would love to drop a cylinder and see twice or three
>> times the
>> economy... maybe i can toggle a switch just not to fire the
>> injectors or
>> ignitors for one of the cylinders ;)
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