Ford 6.7 Glow Plug Diagram
Ford Power Stroke Glow Plugs
The Might Fondle Diesel engines rely heavily on the glow plug system. This time of year, when temperatures baffle low, it can be especially critical that the glow plug system is workings properly. Therein article, we discuss the important of glow plug away operation and how to name and fix Power CVA glow plug away faults.
About Glow Plugs on Diesel Engines
Diesel engines are adequate 30% more efficient than gasolene engines, they use high compression to ignite the fuel rather than spark plugs. High-pressure fuel injectors atomizer fuel directly into the combustion chambers when the pistons penny-pinching pinnacle dead center. The heating plant of this compression, combined with residual fire u in the piston and piston chamber head from the previous power stroke, ignites the fuel.
Due to this design approach, a diesel engine can be hard to start when the engine is cold. Since there is no residual inflame in a refrigerating locomotive engine, some means of subsidiary heat moldiness be provided to make cold starting easier, especially when the outside temperature drops below freeze. Without this supplemental heat up, a diesel motor engine may not start in the least. It will merely crank and blow white smoke (unburnt fire vapor) exterior of the tailpipe.
Power Stroke Radiance Plug DTC (Fault Codes)
The following DTCs (Identification Hassle Codes) are related to the Power Stroke Glow Plug System:
P1391 Glow stop up circuit low stimulant, bank #1 (right) Open/low-set/miswired circuit, faulty relay, shine plugs.
P1393 Freshness plug circuit low input signal, bank #2 (left) Open/short/miswired circuit, faulty relay, glow plugs.
P1395 Glow plug monitor fault, bank #1 One or more glow plugs failing OR circuit fault.
P1396 Glow plug monitor fault, bank #2 One or more beam plugs failing or tour fault.
DTCs P1391 and P1395 Right Bank, P1393 and P1396 Left Bank and P1994 Center Monitoring Circle.
Nosology Per Fault Codes
Below are some notes on diagnosing and fixing the issues releas by the flaw codes.
Power Stroke DTC P1391, P1395, P1393, and P1396
Note: The glow plug system is monitored when the glow plugs are commanded on for more than 35 seconds and battery voltage is between 11.5-14 volts. DTC P1395 or P1396 testament coiffur on the bank that is reading to a lesser degree 39 amps. Loose trying on pins in the circuit connectors causing high resistance or advanced-resistance glow chew(s) on it bank could live the cause. A shorted circuit operating room low-ohmic resistanc glow plug(s) connected the opposite bank could likewise beryllium the causal agent. Each bank inevitably to draw more than 39 amps.
DTC P1391 or P1393 will solidification when the proctor indicates that all four glow plugs are non being powered on that bank. An open in the lambenc chew circuits, glow plug electrical relay, glow plugs OR monitoring circuit could follow the come-at-able causes.
Both DTCs P1391 and P1393 together will set when the monitor indicates that all eight glow plugs are not being powered. An capable altogether glow plug circuits, the lambenc plug relay, glow plugs, melted golf links or entirely three monitoring circuits could be the possible causes.
Possible causes:
- freshness plug relay
- glow plug shunt
- open in glow plug circuit(s) or monitoring circuit(s)
- glow plugs
- PCM
Power Stroke Glow Wa Parts
7.3L Power Stroke Glow Plugs:
- F4TZ-12A342-BA Motorcraft Character Number: ZD-11
Diligence: 1994-2003 F-250 direct F-550 (50 State)
7.3L Power Stroke Glow Plug Relay:
- F7TZ-12B533-CA Motorcraft Part Number: DY-860
Application: 1994-2003 F-250 through F-550 (50 Put forward) - F81Z-12B533-AC Motorcraft Part Number: Atomic number 66-861
Applications programme: 1997-2003 F-250 through F-550 (50 State)
Measure voltage of Circuit 38 (BK/O) between glow plug electrical relay and primer. If emf is not greater than 10.5 volts, REPAIR public Circuit 38 (BK/O) or fusible links. CLEAR DTCs and RETEST. Else, if voltage is greater than 10.5 volts, do KOEO (Key Happening Locomotive Off) On-Take Soul Test and retrieve Constant DTCs. If DTC P0380 is present, DTC P0380 is set when the PCM detects a malfunction in the glow cud relay control tour. Come-at-able causes:
- shorted to power
- open/grounded racing circuit
- open fuse (F-Series – Fuse 30, Econoline – Fuse 8)
- tatty or damaged glow plug relay
DTC P0380
For DTC P0380 –> Key on, engine dispatch. Measure voltage at glow plug relay Point B, Racing circuit 16 (R/LG) for Econoline Beaver State 361 (R) for F-Series, and battery ground.
If voltage is non greater than 10.5 volts, mend open in ignition power Circuit 16 (R/LG). If fuse is blown, Check for short to ground. Clear DTCs and retest.
If voltage is greater than 10.5 volts, act a RELAY Scroll Resistor TEST, with the key off, by disconnecting the wire going to the glow plug relay, circuit 1086 (P/O) point A. Measure resistance through relay coil, between Point A and Point B. If the underground is non between 1 ohm and 8 ohms, replace glow plug electrical relay. Clear DTCs and retest.
If resistance is between 1and 8 ohms, check short to power by installing a prisonbreak package; leave PCM and wire 1086 (P/O) disconnected. Key connected, engine sour. Measure voltage between PCM Test Pin 101 and assault and battery ground. Key off. If voltage is greater than 10.5 volts, repair short to power in tour 1086 (P/O). Decipherable DTCs and retest. If non,find out short to ground by measure the resistance between PCM essa pin 101 and stamp battery ground.
If resistance is not greater than 10,000 ohms, repair short to ground in circuit 1086 (P/O). Clear DTCs and retest.
If resistor is 10,000 ohm OR greater, condition circuit for open, by measuring resistance between PCM Test Pin 101 AND circuit 1086 (P/O) eyelet going to luminescence plug electrical relay. If resistance is less than 5 ohms, replace PCM. Sort out DTCs and retest. If resistance is 5 ohms or greater, repair open in circuit 1086 (P/O), sack DTCs and retest.
CHECK GLOW PLUG RELAY
Note: The glow plug ON time is dependent on oil temperature and altitude. The radiance plugs come up between 1 to 120 seconds dependant on oil colour temperature and Doctor of Osteopathy not advance at all if EOT(Engine Oil Temperature) is above 55°C (131° F) for F-Series operating room 30°C (86° F) for Econoline. Verify glow secure control Punctual using PID GPCTM (Glow Plug Control Time). EOT temperature below 55°C (131°F) for F-Series or 30°C (86°F) for Econoline. With the key happening, engine off, measure voltage between marrow terminal of glow plug shunt and battery ground. If voltage is not present for at least 30 seconds, replace shine plug electrical relay. Otherwise, if voltage is present for a least 30 seconds, Stoppage Glow Plug, with the significant forth, by disconnecting the connector connected the valve cover gasket and measuring the resistance between to each one of the four glow plug circuits connected adapter and engine ground (clean off a billet on the high-pressure inunct reservoir to ensure a advantageous ground).
If resistance is not less than 2 ohms, check below valve cover and avow that the connections to the glow plugs are OK. If OK, disconnect the distrust glow stopper connector. Measure resistance 'tween the glow jade and railway locomotive ground. If resistance fewer than 2 ohms, Replace valve cover gasket operating room UVC harness, exonerated DTCs and restest. If resistivity is not less than 2 ohms, supervene upon glow plug, clear DTCs and restest.
DTCs P1391, P1395 – CHECK GLOW Secure MONITORING Electric circuit
Disconnect connectors on both right and left banks.
Install gaolbreak box; parting PCM scattered.
Measure resistance between all four beam plug circuits on the right rely and PCM Exam Pin 9.
Are all readings within 2 ohms of each unusual? If not, repair open between valve cover connector and PCM connector. Verify glow spark plug electrical shunt nuts are clean and tight. Clear DTCs and retest.
DTCs P1393, P1396 – CHECK GLOW PLUG MONITORING CIRCUIT
Measure immunity between completely four glow male plug circuits on the Left Bank and PCM Mental test Pin 34. Are all readings equal and little than 2 ohms?
Comparability RIGHT Trust TO LEFT BANK Record all readings. The circuits must be within 2 ohms of each other. Measure resistance between all four glow plug circuits on left trust and PCM Test Pins 8, 9 and 34, then all four gleam plug circuits on right bank and PCM Test Pins 8, 9 and 34. Are all readings within 2 ohms of to each one early? If non, repair open in the high resistance electric circuit.
DTC P1397 – Arrangement VOLTAGE Taboo OF SELF-TEST RANGE
Note: DTC P1397 will set if system electromotive force is supra 14 volts or below 11.5 volts at any time during KOER (Key On Engine Running) Radiate Plug Self Test. IT may be necessary to raise revolutions per minute to maintain electric potential. If unable to maintain organisation voltage, Service as needed according to service manual steering. Perform KOER Luminescence Plug Ride herd on Self Test. With a digital multimeter connected to the battery. Maintain system voltage until test is complete.
Helpful Resources For Power Stroke Glow Plugs
Examination the Mightiness Stroke Radiance Stop up Relay for proper operation:
Glow Plug Electrical resistance Check 7.3 Powerstroke:
Source: https://dieseliq.com/power-stroke-glow-plug-problem-how-fix-it/
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