How to convert drive by wire
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Joined: 03-22-07
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From: Still fixing others mistakes.
let me quote myself. again
Originally Posted by area47
nope. doesn't work like that. the leading and trailing voltages of the throttle body come into play big time here. 0-5v, then 5-0v. this is where it gets fun. i spent the better part of a week digging into this via my connections that i have gathered through my time here. valuable to say the least.
the stock ecm MUST use the drive by wire tb from the lsj, or an ls4 to work right. if it is not used the car will not run on the stock ecm/bcm setup. it will throw itself into limp mode and shut itself down. the stock tb can not be set off to the side and a throttle cable system used. airflow is checked against other parts of the map itself in the ecm.
if the stock ecm must be used and you want a throttle cable. you have to re-write the entire em coding to do this. still want to do it? good luck.
you can run a standalone on the lsj. you have to figure out what you want to do as a trigger. either crank trigger with say a 12 to 1 setup, or use an msd dizzy to get the trigger for the spark. you can setup an aem system to batch fire the injectors if you so desire. or you can custom make a crank pick up to do sequential injection.
if you rreeeaaallly want to do the stock ecm, which i advise against in your quest. the pedal the potentiometers come separately. there are two in the black box attached to the throttle pedal itself. also need to wire in certain things from the bcm to work with it as well.
in short. it will be cheaper to go full standalone than to run the stock lsj ecm/bcm.
hopefully this clears the smoke and mirrors **** you have seen already on this topic.
the stock ecm MUST use the drive by wire tb from the lsj, or an ls4 to work right. if it is not used the car will not run on the stock ecm/bcm setup. it will throw itself into limp mode and shut itself down. the stock tb can not be set off to the side and a throttle cable system used. airflow is checked against other parts of the map itself in the ecm.
if the stock ecm must be used and you want a throttle cable. you have to re-write the entire em coding to do this. still want to do it? good luck.
you can run a standalone on the lsj. you have to figure out what you want to do as a trigger. either crank trigger with say a 12 to 1 setup, or use an msd dizzy to get the trigger for the spark. you can setup an aem system to batch fire the injectors if you so desire. or you can custom make a crank pick up to do sequential injection.
if you rreeeaaallly want to do the stock ecm, which i advise against in your quest. the pedal the potentiometers come separately. there are two in the black box attached to the throttle pedal itself. also need to wire in certain things from the bcm to work with it as well.
in short. it will be cheaper to go full standalone than to run the stock lsj ecm/bcm.
hopefully this clears the smoke and mirrors **** you have seen already on this topic.
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