KR with E85
TECH Senior Member
Joined: Apr 2002
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From: So.Cal.
The KR waveform isn't sawtooth shaped... so it might not be detonation... it might be a single instance of some mechanical noise;
if you have a Chassis Ear you can clamp/tie it to the engine block and listen to see if it is knock or mechanical;
try going richer and check that wideband and HO2Sx1 voltages both respond accordingly (I was expecting to see HO2Sx1 voltages above 920mV).
if you have a Chassis Ear you can clamp/tie it to the engine block and listen to see if it is knock or mechanical;
try going richer and check that wideband and HO2Sx1 voltages both respond accordingly (I was expecting to see HO2Sx1 voltages above 920mV).
AFAIK, the only way to do that, is to run OL and tune it where ya want it. Not what I'd ever want to do, as you'll lose fuel trims....besides, E85 (to me) means that you're pretty-much throwing "MPG" out the window.
Grr, I take it you mean 27 degree's at WOT. what about at cruising speeds what is best spark advance to maximize fuel mileage with e85?
thanks for the help i appreciate it.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
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From: So.Cal.
You would enter 6688 cc (408 ci = 6.688L), you need to use the correct displacement with calc.vet...
or, if you're want to get comfy with g*K/kPa rather than % units (both in scantool and tunetool), then you never need to bother with entering displacement again.
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Verdad Gallardo From what I've been told, even with it "enabled" in the tune, the PCM will still not allow any leaner than 14.7:1.....something to do with it being hard-coded in the PCM.....again, this is just what I've been told. Now, I suppose it's possible that it could work with E85, being that stoich is numerically so much "richer" than E0, but I'm not sure. Maybe someone else will chime in here?
From what I've been told, even with it "enabled" in the tune, the PCM will still not allow any leaner than 14.7:1.....something to do with it being hard-coded in the PCM.....again, this is just what I've been told. Now, I suppose it's possible that it could work with E85, being that stoich is numerically so much "richer" than E0, but I'm not sure. Maybe someone else will chime in here?
I was reading up on it and in efilive you need some .cax file and i put it where it says, but it is the only .cax file in the directory so not real sure if its gonna work or not. The lean cruise tables were there before i even read about this moving these files to enable it.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
From what I've been told, even with it "enabled" in the tune, the PCM will still not allow any leaner than 14.7:1.....something to do with it being hard-coded in the PCM.....again, this is just what I've been told. Now, I suppose it's possible that it could work with E85, being that stoich is numerically so much "richer" than E0, but I'm not sure. Maybe someone else will chime in here?
E85's stoichiometric AFR is "numerically richer" than E00, but in terms of Lambda it is the same (stoich = Lambda 1.0000)...
so for example, if he runs E00 or E85 (or anything in between), when LC enables he will see Lambda be about 1.035 (regardless of fuel).
Last edited by joecar; Sep 12, 2012 at 10:58 AM.
Joecar, any advice on what to set B3638 the lean out rate. Also an initial lean cruise table values and coolant modifier. Never messed with it before or seen anyone set this up so not sure how lean to run it at what rpms. I'm thinking only lean it out at rpms i cruise down the highway at? Thanks for all your help!
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Joecar, any advice on what to set B3638 the lean out rate. Also an initial lean cruise table values and coolant modifier. Never messed with it before or seen anyone set this up so not sure how lean to run it at what rpms. I'm thinking only lean it out at rpms i cruise down the highway at? Thanks for all your help!
Last edited by joecar; Sep 12, 2012 at 02:09 PM.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
you can highlight a section of the log, click the Crop button, and save the log as a new filename...
(hover over the buttons along the bottom of the scantool chart display).
TECH Senior Member
Joined: Apr 2002
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From: So.Cal.
Goto www.tunefiledepot.com and look at the 2001/2002 Holden tune files (EFILive format)... look at all the LC tables B3634-B3639.
The LC enable parameter is B9100, unzip and drop the attached .cax file into C:\Program Files\EFILive\V7.5\Calibrations
[ that .cax file is for 12212156/0202000x only and has the wrong addresses for any other OS ]
The LC enable parameter is B9100, unzip and drop the attached .cax file into C:\Program Files\EFILive\V7.5\Calibrations
[ that .cax file is for 12212156/0202000x only and has the wrong addresses for any other OS ]
Last edited by joecar; Sep 12, 2012 at 04:42 PM.
Sometimes when I disable Burst knock, I get knock retard on the logs. I reenable it and the knock retard is gone with no other changes.
Don't know why, but it makes the PCM pull timing because of false knock. Not always tho
Don't know why, but it makes the PCM pull timing because of false knock. Not always tho