KE-jetronic closed loop

[James Weiler]

Hello everyone.  A recent discusion has prompted me to ask how an oxygen 
sensor feeds back on a mechanical injection system?  Does it contol a 
fuel pump relay that alters the pressure?  It makes sense how feedback 
works on an electronic system by altering the pulse width of the 
injectors.  But there is no pulse width in a CIS system.

Thanks to anyone who can educate me

james at brc.ubc.ca(james wieler)