I want basic block diagram of plenum cable - Superior Essex Marathon LAN Cat 5e Bulk Cable CMP Plenum (SUPERIORESSEXMARATHONPLENUM)

on a 97 5.7 liter the regulator is located on the CPI unit under the upper plenum. The upper plenum will need to be removed from the engine in order to gain access to the regulator.

Basically you will remove the metal fuel lines from the top of the engine. Unplug all the connectors. remove the throttle cables, disconnect vacuum lines, unthread EGR pipe, and remove the bolts holding the plenum in place.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

on a 97 5.7 liter the regulator is located on the CPI unit under the upper plenum. The upper plenum will need to be removed from the engine in order to gain access to the regulator.

Basically you will remove the metal fuel lines from the top of the engine. Unplug all the connectors. remove the throttle cables, disconnect vacuum lines, unthread EGR pipe, and remove the bolts holding the plenum in place.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Here are the instructions with a diagram. If you need to enlarge the diagram save it to your picture files and then enlarge it there.

1. Disconnect battery ground cable, then drain cooling system. See: Engine, Cooling and Exhaust\Cooling System\Service and Repair

2. Disconnect heater hoses from heater core. Plug heater hoses and core fittings to prevent coolant spillage.

3. Remove bolt located below windshield wiper motor, attaching left end of plenum to dash panel.

4. Remove nut attaching upper left corner of evaporator or heater case to dash panel.
5. Disconnect vacuum control system supply hose from vacuum source, then push grommet and hose into passenger compartment.

6. Remove all instrument panel retaining screws and pull instrument panel back as far as possible without disconnecting any wire harnesses.
7. Loosen right door sill plate and remove side cowl trim panel.

8. Disengage temperature control cable housing from bracket on top of plenum. Disconnect cable from temperature blend door crank arm.

9. On models w/Automatic Temperature Control (ATC) , remove cross body brace and disconnect wiring harness from temperature blend door actuator and disconnect ATC sensor tube from evaporator case connector.
10. Disconnect vacuum harness at vacuum connector near floor air distribution duct.

11. Disconnect white vacuum hose from outside recirculating air door vacuum motor.
12. Remove two hush panels.

13. Remove one plastic push fastener retaining floor air distribution duct to left end of plenum. Remove left screw and loosen right screw on rear face of plenum. Remove floor air distribution duct.

14. Remove two screws from rear side of floor air distribution duct to plenum. To remove right screw, it may be necessary to remove the two screws attaching lower panel door vacuum motor to mounting bracket.

15. Remove push fastener attaching floor air distribution duct to left end of plenum, then remove floor air distribution duct.
16. Remove two nuts located along lower flange of plenum.
17. Carefully move plenum rearward, so that heater core tubes and plenum case upper stud clear openings in dash panel, then remove plenum from vehicle by rotating upper portion of the plenum forward, down and out from under instrument panel. It may be necessary to carefully pull lower edge of instrument panel rearward while plenum is being removed from behind instrument panel.
18. Remove retaining screws from heater core cover, then the cover from plenum assembly.

19. Remove retaining screw from heater core inlet and outlet tube bracket.

Heater core removal and installation diagram.






20. Pull heater core and seal assembly from plenum assembly.
21. Reverse procedure to install.

Removal & Installation 1997-2002 To Remove:
NOTE: Heater core must be vacuum leak tested before it is remove from vehicle if a heater core leak is suspected.

1. Drain engine coolant.
2. Remove instrument panel.
3. For 5.4L (4V), if quipped, remove junction splash shield.
4. For 5.4L (4V), if quipped, disconnect starter relay cable.
   
   
5. For 5.4L (4V), if quipped, remove junction block bracket.
6. Clamp inlet and outlet heater hoses.
7. Disconnect heater hose from heater core by gently pressing it toward heater core.
8. Remove A/C plenum demister adapter.
9. Disconnect vacuum line.
10. Remove 13 plenum chamber top screws.
11. Remove blend door assembly from case.
12. Remove heater core.

To Install:
NOTE: If needed, clean and lubricate coolant hoses with plain water.

1. Install heater core.
2. Install blend door assembly to case.
3. Install 13 plenum chamber top screws.
4. Connect vacuum line.
5. Install A/C plenum demister adapter.
6. Connect heater hose to heater core.
7. Release all clamps from inlet and outlet heater hoses.
8. For 5.4L (4V), if quipped, install junction block bracket.
9. For 5.4L (4V), if quipped, connect starter relay cable.
10. For 5.4L (4V), if quipped, install junction splash shield.
11. Install instrument panel.
12. Refill engine coolant.

The problem is the heater core leaking behind the dashboard. Heater Core Removal & Installation 1997-2002 To Remove:
NOTE: Heater core must be vacuum leak tested before it is remove from vehicle if a heater core leak is suspected.

1. Drain engine coolant.
2. Remove instrument panel.
3. For 5.4L (4V), if quipped, remove junction splash shield.
4. For 5.4L (4V), if quipped, disconnect starter relay cable.
   
   
5. For 5.4L (4V), if quipped, remove junction block bracket.
6. Clamp inlet and outlet heater hoses.
7. Disconnect heater hose from heater core by gently pressing it toward heater core.
8. Remove A/C plenum demister adapter.
9. Disconnect vacuum line.
10. Remove 13 plenum chamber top screws.
11. Remove blend door assembly from case.
12. Remove heater core.

To Install:
NOTE: If needed, clean and lubricate coolant hoses with plain water.

1. Install heater core.
2. Install blend door assembly to case.
3. Install 13 plenum chamber top screws.
4. Connect vacuum line.
5. Install A/C plenum demister adapter.
6. Connect heater hose to heater core.
7. Release all clamps from inlet and outlet heater hoses.
8. For 5.4L (4V), if quipped, install junction block bracket.
9. For 5.4L (4V), if quipped, connect starter relay cable.
10. For 5.4L (4V), if quipped, install junction splash shield.
11. Install instrument panel.
12. Refill engine coolant.

Expedition and Navigator



Fig. 7 Remove the A/C plenum demister screw and remove the A/C plenum demister adapter



Fig. 8 Disconnect the vacuum line



Fig. 9 Remove the heater core bracket



Fig. 10 Remove the 13 retaining screws and remove the plenum chamber top



Fig. 11 Remove the heater core

1. Disconnect the battery ground cable.
2. Drain and recycle the engine coolant.

CAUTION Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

1. Remove the instrument panel. Refer to .
2. If equipped with the 5.4L 4V engine, remove the junction block splash shield.
3. If equipped with the 5.4L 4V engine, remove the bolts and disconnect the cable ends from the starter relay.
4. If equipped with the 5.4L 4V engine, remove the junction block bracket.
5. Disconnect the heater core hose couplings.
6. Remove the retaining screw and remove the A/C plenum demister adapter.
7. Disconnect the vacuum line from the A/C plenum demister adapter.
8. Remove the heater core bracket.
9. Remove the 13 plenum chamber top retaining screws.
10. Remove the plenum chamber top.
11. Remove the blend door assembly from the case.
12. Remove the heater core.To install:
13. The installation is the reverse of the removal.

Also this VIDEO can help to solve your problem...

Hope this help.

An oven heating control system.
schematic diagram?
block diagram?
the feedback operation in the control system?
control objective?
five basic element of the control system?

1. drain coolant
2.remove instrument panel
3. for 5.4 (4v) if equiped,remove junction splash shield
4.for 5.4 (4v) if equiped, disconnect starter relay cable

1. For 5.4L (4V), if quipped, remove junction block bracket.
2. Clamp inlet and outlet heater hoses.
3. Disconnect heater hose from heater core by gently pressing it toward heater core.
4. Remove A/C plenum demister adapter.
5. Disconnect vacuum line.
6. Remove 13 plenum chamber top screws.
7. Remove blend door assembly from case.
8. Remove heater core.

To Install:
NOTE: If needed, clean and lubricate coolant hoses with plain water.

1. Install heater core.
2. Install blend door assembly to case.
3. Install 13 plenum chamber top screws.
4. Connect vacuum line.
5. Install A/C plenum demister adapter.
6. Connect heater hose to heater core.
7. Release all clamps from inlet and outlet heater hoses.
8. For 5.4L (4V), if quipped, install junction block bracket.
9. For 5.4L (4V), if quipped, connect starter relay cable.
10. For 5.4L (4V), if quipped, install junction splash shield.
11. Install instrument panel.
12. Refill engine coolant.

I hope this helps you

Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink ant that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.


Heater Core
1. Disconnect the battery ground cable
2. Drain and recycle the engine coolant.
3. Remove the instrumental panel.
4. If equipped with the 5.4L 4V engine, remove the junction block splash shield.
5. If equipped with the 5.4L 4V engine, remove the bolts and disconnect the cable ends from the starter relay.
6. If equipped with the 5.4L 4V engine, remove the junction block bracket.
7. Disconnect the heater core hose couplings.
8. Remove the retaining screw and remove the A/C plenum demister adapter.
9. Disconnect the vacuum line from the A/C plenum demister adapter.
10. Remove the heater core bracket.
11. Remove the 13 plenum chamber top retaining screws.
12. Remove the plenum chamber top.
13. Remove the blend door assembly from the case.
14. Remove the heater core.
15. The installation is the reverse of the removal.

Depending on the tightness of the socket fit and the engine, carefully pull the spark plug out of the bore



Hope this helps some...best that I can find!