View Single Post
GH85Carrera GH85Carrera is online now
Get off my lawn!
 
GH85Carrera's Avatar
 
Join Date: Nov 2007
Location: Oklahoma
Posts: 85,936
Garage
Quote:
Originally Posted by wazzz View Post
Don't know where you read this, but this is not correct. The ECU on '80s Carrera is completely switched off from power supply (battery) every time ignition is switched off. No memory is maintained and no backup power supply is used by this generation of Motronic ECU. Hence it makes no difference whether you keep the battery connected or disconnect it.

If your problem has disappeared, it must be a coincidence.
Yea, the fuel map is loaded from the massive 8 kilobyte CPU and you are off. Earlier 3.2 DME computers only have a 4K chip. No room for storing or learning anything.
__________________
Glen
49 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
Old 04-03-2025, 02:35 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)