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Old 03-23-2009, 09:09 AM   #4 (permalink)
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Ziggy - '95 Audi S6 Sedan

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The 1988 Audi 80 should have a K-Jetronic continuous fuel injection system. The injectors are not pulsed on and off. Rather, they remain on and the flow is varied. It is possible that the ECU has a fuel flow output signal because most Audis had a trip computer as an option. For example, my 1990 Audi 200 has a trip computer and uses an ECU signal for fuel flow. Some research into the signals provided by the Audi 80 ECU is necessary. If a fuel flow signal is available, the MPGuino could be used.

An interesting explanation of the K-Jetronic is here on Page 85.

According to AudiWorld (, the U.S version of the 1988 Audi has CIS-Motronic engine control for the 4 cylinder engine and CIS-E III engine control for the 5 cylinder. The CIS (Continuous Injection System) is the one I mentioned above.

Last edited by rmccomiskie; 03-23-2009 at 08:47 PM..
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