mkhargrove

i've looked at the wiring diagrams for 83, 84, 85. i can't seem to find the path for the signal that tells the fuel injection to fire (upstream of the controller). i thought i read somewhere that it triggers the tach and the circuit went from the tach to the controller, but i can't find a signal leaving the tach....

Rich9928p

I assume you're referencing the US 1984 928 L-Jetronic fuel injection system.

The transistor ignition control unit output pin 16 (green) connects to central electric O7. It connects to Fuel Pump Relay XVII pin 31b and the same signal is routed to the tachometer.. From there it connects to central electric W7 where it then connects to L-Jet control unit Pin 1.

Rich
928 Owners Club Membership Chairman
1993 928 GTS cover girl
1987 928 S4
1979 928 5-speed rescue cover girl
1979 928 Euro track beast

mkhargrove

Well thank you sir. You answered my question. That's why I couldn't see goimg downstream from the tach.