Valve cover wiring diagram & more - Ford Powerstroke Diesel Forum

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post #1 of 12 Old 10-21-2008, 11:59 AM Thread Starter
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Exclamation Valve cover wiring diagram & more

was gonna check my glow plugs today through the harness but.......all the write ups talk about a single plug with 8 or 9 wires, my '96 has TWO plugs with FIVE wires each! so how do I know which wires on the harness are the glow plug wires that I test resistance on?





I checked and GPR and it started with 10.8VDC and had a steady climb to 11.5VDC.

to top it off, the FRONT driver's plug looks like the clip has been broken off and they held it together and slobbered silicone on it.



so i pulled the driver's cover and tested the plugs that way and here's what I got:
cylinder 2: 1.3ohms, cylinders 4,6, and 8 were all under 1 ohm.

also while under there i noticed my rocker arms and some push rods had surface rust on 'em, which is puzzleing since they should be in a constant shower of oil!!!!!!!!


Also, on a side note, i removed #2 glow plug to inspect and see if they were cheapos (in which case id replace 'em all) and all it said was made in germany, no names or anything.

in the process of removing, ive read that your deep well socket can hang up on the rocker arm, so i broke the plug loose with 1/4" drive deep well and then loosened it the rest of the way with my 10mm nut driver which is hollow for deep well applications and it didnt get caught. then of course fis it out with needle nose. and i put back in with the nut driver and snugged with ratchet. worked like a charm! also the plug was covered in oil when i removed so i turned the engine over with plug out to expell any oil and possibly avoid hydro lock?

ok, enough typing!

-ReD

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post #2 of 12 Old 10-21-2008, 12:21 PM
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THE 2 OUTSIDE WIRES ARE THE ONES FOR THE GLOW PLUGS

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post #3 of 12 Old 10-21-2008, 12:38 PM Thread Starter
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Quote:
Originally Posted by SCUFFY828 View Post
THE 2 OUTSIDE WIRES ARE THE ONES FOR THE GLOW PLUGS
on EACH plug? that would be 8 wires per side and 16 total for the engine.

OR

the TWO rear wires on the REAR plug, and the two front wires on the FRONT plug?

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post #4 of 12 Old 10-21-2008, 12:42 PM
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The 2 outside wires on each plug. 4 wires per head.

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post #5 of 12 Old 10-21-2008, 12:46 PM Thread Starter
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The 2 outside wires on each plug. 4 wires per head.
thank you. i needed it dumbed down for me

now what about the rust? and would it be safe to assume that the plug with the higher resistance is closer to dying than the rest?

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post #6 of 12 Old 10-21-2008, 12:49 PM
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Honestly, it's safer not to assume anything. Logically speaking, higher resistance would would your statement true, but I leav nothing to chance. Call up powerstrokeshop.com I think they make the pig tails and sell them cheap.

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post #7 of 12 Old 10-21-2008, 02:07 PM Thread Starter
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cylinder 7 had 8ohms of resistance, the rest had 0.8ohms.

the front plug was a surprise to me!


Looks like it was burned or something but the valve cover end looked fine and pin was intact and looked good. not bent or n e thing. so i have 2 plugs not workin on pass side (5&7) but #5 tested fine so i spect will work when plug is replaced.

-ReD

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post #8 of 12 Old 10-21-2008, 02:23 PM
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high resistance in the glow plugs are what causes the heat and the melting of the plugs , replaced all glow plugs at least on that side , short harness and valve cover gasket

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post #9 of 12 Old 10-21-2008, 02:35 PM
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if you are in that deep already you should just replaced them they are realy cheap

97
afe intake
ats intercooler
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thinking real hard about a nozzle upgrade




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post #10 of 12 Old 10-21-2008, 02:55 PM
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Yep. Nice burn pattern.

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