72 Swinger - Some wiring questions.
OK -- the NOX system -- now we are getting somewhere. Thank you.
This is an original California car, and the FSM says "NOx CONTROL SYSTEM: The NOx system is installed on vehicles sold in California to control nitrous oxide emissions."
I know that the vacuum port on the carb is hooked directly to the vacuum advance on the distributor (no solenoid in between). It has been like that ever since I've had the car, so I assume that the system was disabled a long time ago.
So the item in #2 in my pictures appears to be the Control Unit, which senses temperature and receives info from the Speed Switch on the transmission. That feedback tells it whether to block the vacuum advance.
And the plug in #1 might have gone to the (now non-existent) timing-retarding solenoid valve. I did a continuity test between the terminals in the dangling plug in #1 and the control unit plug in #2 and it indeed checks out according to FSM the wiring diagram for the NOX control system.
I assume I can gently remove these items with no ill effect? They seem to be a control system for a valve that is no longer there. Or should I add a solenoid valve and try to get the system working again?
OK -- the NOX system -- now we are getting somewhere. Thank you.
This is an original California car, and the FSM says "NOx CONTROL SYSTEM: The NOx system is installed on vehicles sold in California to control nitrous oxide emissions."
I know that the vacuum port on the carb is hooked directly to the vacuum advance on the distributor (no solenoid in between). It has been like that ever since I've had the car, so I assume that the system was disabled a long time ago.
So the item in #2 in my pictures appears to be the Control Unit, which senses temperature and receives info from the Speed Switch on the transmission. That feedback tells it whether to block the vacuum advance.
And the plug in #1 might have gone to the (now non-existent) timing-retarding solenoid valve. I did a continuity test between the terminals in the dangling plug in #1 and the control unit plug in #2 and it indeed checks out according to FSM the wiring diagram for the NOX control system.
I assume I can gently remove these items with no ill effect? They seem to be a control system for a valve that is no longer there. Or should I add a solenoid valve and try to get the system working again?
