LCD control

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Nov 23, 2017 | 07:18 PM

Space387

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Racer

Joined: Sep 2017

Posts: 452

Likes: 55

From: Marianna Fl

LCD control

So I'm looking through the schematics on how the ecm communicates with the car and something got my curiosity, how dose a 1990 corvette determine and command the MPG readout? Also if you modify the car with bigger injectors and upgraded parts how would you correct for this? This is more a curiosity thing, I just like to know how stuff like this works.

Last edited by Space387; Nov 23, 2017 at 07:19 PM.

Nov 23, 2017 | 10:53 PM

aklim

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Joined: Jul 2004

Posts: 28,502

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From: Hartford WI

Quote:

Originally Posted by Space387

How much money you got to waste? That is the question. AFAIK, the thing uses pulse width and fuel level to determine how much is used and how much is left. If that is right, you can't change it without going far into the module since it is probably hard coded there. I have 42pph injectors. I know that, the builder knows that and the ECM knows that. The module doesn't and without money, I don't know anyone who will try to reprogram it and it isn't worth it.

Nov 23, 2017 | 11:09 PM

Space387

Thread Starter

Racer

Joined: Sep 2017

Posts: 452

Likes: 55

From: Marianna Fl

Understand, it's a curiosity though. Like tuning the ecm it may be easier than we think but until we dig into it none of us will know.

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