Good Morning

Discussion in 'General Discussion' started by Bob Hogan, Nov 12, 2016.

  1. 67Mopar

    67Mopar Moderator Staff Member

    I feel your pain Bob Wacko

    Had the hood up on the truck yesterday performing a little electrical modification.
    These old Dodge Diesels are noted for going through Voltage Regulators on a regular basis, and I was determined to figure out why. Looking at the diagram for the Truck, it was apparent that the normal Ignition Circuit, which provides the Voltage Regulator with a reference voltage, also feeds a number of other circuits, some of which are easily compromised.
    If just one of these associated circuits has an issue with poor connections or a mild short etc., it can pull down the entire system, dropping the voltage below the VR's threshold, forcing it (and the alternator)to remain active the entire time the engine is running, overcharging the battery and burning up the VR.

    To test mine, I started the truck, and unplugged the VR. I took a voltage reading off the Battery and a voltage reading off the 2 pin connector for the VR. I had full voltage at the battery, but only 11 volts to the VR.... BINGO... just as I suspected, the VR was in a constantly active state.

    To fix this issue, I cut into the wiring harness where all these circuits feed by the ignition are spliced together, and then separated the two wires from it that are associated with the charging circuit. I then installed a relay using the old ignition circuit wiring as a trigger for the relay, and attach the two charging circuit wires to the output of the relay. I ran a direct feed from the battery itself to the relay as the new Reference Voltage signal for the VR.
    In short... the Voltage Regulator now takes its reference voltage directly from the battery itself... and it works wonderfully!

    I also found the cause of the voltage drop in the ignition circuit, but that's for another day.

    Diagram_edited-1.png

    Diagram EDIT.jpg
     
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  2. Bob Hogan

    Bob Hogan Active Member

    Keep us post on how it works down the road. Brilliant I say !!!! Looks like you used the Bosch style replay? One of my favored styles... :)
     
  3. Bob Hogan

    Bob Hogan Active Member

    RITE !!!!!!!!!!!!!! lol
     
  4. Bob Hogan

    Bob Hogan Active Member

    And you guys all know what happens when you start messing with all this old wiring... (Get of the spools and connectors and cutters) I guess....lol
     
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  5. 67Mopar

    67Mopar Moderator Staff Member

    Yes Bob... it's a Bosch style relay.:D

    Started the truck yesterday morning, and made the 4-1/2 hour trek back to CT.
    ...so I'm here now, ready to return to work on Monday... that's so depressing. :(

    The truck is well overdue for an oil change, so that's on the Must-Do, To-Do list for today.
     
  6. 67Mopar

    67Mopar Moderator Staff Member

    Changed the oil... now I have a fuel leak!!!!
    I just can't catch a break!
     
  7. Huskidrive

    Huskidrive Active Member

    Untitled.jpg
     
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  8. 67Mopar

    67Mopar Moderator Staff Member

    I have to pull the VE pump to fix the leak. The flange on the inboard side of the pump across from the KSB is leaking. Big Job, not for the faint of heart. Looking on the bright side, with everything torn apart, it will make it easier to finish a few of the other engine mod jobs on the To-Do list.
     
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  9. Bob Hogan

    Bob Hogan Active Member

    Good Morning Y'all… Heads are back from the machine shop... Now time to het this old dog back up and running. Let the fight begin....lol
    Mike, Good to hear your heading back to work! Hope all goes well.
    And as for being behind the 8 ball..... I Feel your pain,,,,, Drunk
     
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  10. 67r/t4speeder

    67r/t4speeder Active Member

    20190414_082650.jpg I put my console tachometer back in after 25 years or so when I took it out. I had a old Sun bolted to the column and decided to take it out since I never look at it anyway (I use my ears).
    I do need to update it with maybe solid state? It is fine at idle but jumps too high when I rev engine. I am thinking it might be due to I have electronic ignition now.

    Thoughts or been there done that input appreciated?

    Good Morning
     
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  11. Bob Hogan

    Bob Hogan Active Member

    Nice
     
  12. Bob Hogan

    Bob Hogan Active Member

    CF4B1603-B6F3-4B5E-AFCE-914E741ACB10.jpeg
     
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  13. Bob Hogan

    Bob Hogan Active Member

    All ready to tear it up again
     
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  14. 67Mopar

    67Mopar Moderator Staff Member

    One less thing to think about now. Great job... Enjoy my friend! Beer
     
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  15. 67Mopar

    67Mopar Moderator Staff Member

    The source of my fuel leak on the old diesel VE Pump. Right back there in the worst possible location, on the inboard side of the pump next to the block.

    IMG_0916edt.jpg
     
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  16. 67Mopar

    67Mopar Moderator Staff Member

    Replaced the wimpy OEM fuel pump this morning with a "modified" 2nd gen pump.
    4psi min // 14psi max HVLP Low pressure piston lift pump.

    Tomorrow I open up that VE Pump above and make some modifications.
    The bolting for that leaky flange was only finger tight. No wonder it let go...

    Pump3.jpg
     
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  17. Bob Hogan

    Bob Hogan Active Member

    Good Morning Y'all….
    Looks like your digging in deep now.... :) Keep on Chipping at it !!!
     
  18. 67Mopar

    67Mopar Moderator Staff Member

    Didn't have a lot of time today, but I did get a few things accomplished.
    Replaced that farg'n blown out O-Ring this afternoon! I also dug into the pump and replaced the governor spring, changing the max RPM from the stock 2600 rpm, to 3200 rpm. I also swapped out the factory fuel pin with an aftermarket job that gives a little better performance.
    Hope to get all back together tomorrow, time and weather permitting. I got rained out today. I'll have to make a few adjustments once everything is back together. Kind of like making a big change to your carburetor, and starting it up for the first time. Always something to tweak afterwards eh.

    VE Update3.jpg VE Update1.jpg VE Update4.jpg VE Update2.jpg
     
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  19. 67Mopar

    67Mopar Moderator Staff Member

    I put the modified VE pump back on the truck yesterday.
    Between the new HVLP fuel pump, the Modified VE Injection pump, and a bump in engine timing, the engines performance level has risen dramatically... I mean Holy Crap, what a difference! Just leaving the driveway was a shocker... I stepped on the go pedal to leave in the usual slow, calm neighborly fashion, and the truck pushed me back in my seat... which in turn resulted in a big grin on my face!

    Of course, this all started because a small fuel leaked developed at the inboard side of the VE pump shortly after I finished changing my engine oil.
    So yesterday, after putting everything back together and reconnecting the battery, I noticed the green lamp on the Trailer Brake Controller was lit... with the engine off, no trailer attached, and no key in the ignition!!!!
    It's just one farg'n thing after another around here...ROLF
     
    Bob Hogan likes this.
  20. 67r/t4speeder

    67r/t4speeder Active Member

    Good morning 20190504_101329_resized.jpg
     

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