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  1. H

    89 Navistar 7.3 idi----Learner Question

    Well yeah, didn't think it'd be quite as much as the schrader but figured for a little more than that. I've only tried about 5 or so 10 second tries. Only a couple with the on line loosened 3-4 turns. And when I tightened it some diesel ran down enough to wet the threads some. Ok, so I may...
  2. H

    89 Navistar 7.3 idi----Learner Question

    What about leaving all the injector connections loose using a remote start button while watching for fuel at the injectors? That should prevent air build up?
  3. H

    89 Navistar 7.3 idi----Learner Question

    I don't think the brakes are electric vacuum. There is a very large motor that appears to have fluid hoses attached to it. No vacuum canister as on a pickup. When the brake pedal is pressed, the motor starts turning. For steering, this is not a pickup. It's a U-Haul with a 26 foot box. 32 feet...
  4. H

    89 Navistar 7.3 idi----Learner Question

    If I had a way to steer the truck I'd just tow it the three miles and fix it later. But there's no way to steer it without the engine running. Got brakes off the battery but no power steering.
  5. H

    89 Navistar 7.3 idi----Learner Question

    Thanks. Pouring diesel in has been scratched. There's a couple of places on Ebay that will do a rebuild for dirt cheap. I only need to move the truck 3 miles and it may then set another 5 years. Hmmm......., what if the diesel was atomized with a sprayer during cranking?
  6. H

    89 Navistar 7.3 idi----Learner Question

    My concern is that ether is used as a starting aid and added to the diesel being injected. My IP is likely on the blink and will need to be sent for a rebuild/recondition. But first I'd like to be certain that it's not just a glued valve in the IP that an engine running, sort of, might shake...
  7. H

    89 Navistar 7.3 idi----Learner Question

    What if a block heater was plugged in for a couple of hours and enough diesel was sprayed into the intake for it to run? That would be with leaving the glow plugs operating. Would it start and run?
  8. H

    89 Navistar 7.3 idi----Learner Question

    Never mind.....seems the formula has changed and it no longer works. Is there anything safer than ether, maybe about the same as WD-40 used to be?
  9. H

    89 Navistar 7.3 idi----Learner Question

    What's the current wisdom about using WD-40 as a starting fluid?
  10. H

    89 Navistar 7.3 idi----Learner Question

    40 days later......hope yall are still monitoring. I was forced to suspend my efforts on the U-Haul/RV in order to build fences and set up other stuff on the ranch I'm relocating to. All is now done, except moving the RV. Turned out there was a really weird pattern on the bottom of the saddle...
  11. H

    89 Navistar 7.3 idi----Learner Question

    Sand and gravel in the bottom of the saddle tank. Some as large as 1/4" across. All the past pumps except the mechanical had filters. But just in case, I'll change the main filter again to be safe. Tank coming off for a thorough cleaning. It will be so great if that's the only problem and it...
  12. H

    89 Navistar 7.3 idi----Learner Question

    Yeah, but the idea somebody put plastic bags in my tank feeds my paranoid tendencies better. But seriously, thanks. Did not think of that but that does fit. When I bought the truck 10 years ago I installed brand new OEM seat covers and floor mat. As I recall, the floorboard had been cut open...
  13. H

    89 Navistar 7.3 idi----Learner Question

    @Clb Yeah, I remember from 4-5 years ago when the mechanical was going out and I was blowing white smoke, (thought it was water at first), I was reading up on the net and read that the IP can do some of the work of the lift pump but can become overworked and die an early death. I READ THAT ON...
  14. H

    89 Navistar 7.3 idi----Learner Question

    Brief update: The pressure gauge was relocated to the top of the pump and still shows decreasing pressure after a minute or two running. The intermittent nature of the pressure reading has me wondering if there is a problem with the pickup line. There is a large clear filter housing on the...
  15. H

    89 Navistar 7.3 idi----Learner Question

    Ok, thanks. Looks like the Seafoam will be soaking that area while the fuel supply issue gets sorted. I searched for 2+2 solvent and came up empty.
  16. H

    89 Navistar 7.3 idi----Learner Question

    @Thewespaul Well, your not the first to suggest me overthinking things and likely not the last, and I may well be overthinking but my standard defense is that it is almost always better to overthink than underthink. Anyhow, did go to town and picked up some Seafoam. Loosened the IP inlet pipe...
  17. H

    89 Navistar 7.3 idi----Learner Question

    .........then it is apparently fitted with an Energize To Shut Off (ETSO) and not an Energize To Start (ETR) as my truck is fitted with. If it were an ETR solenoid, the ETR solenoid would need to be in place to "R" run. When the ETR is de-energized, it is a spring that closes the fuel. But...
  18. H

    89 Navistar 7.3 idi----Learner Question

    From Page 7 & 8: Quote: "Energized-Run (ETR). De-energizing the shut-down coil allows the spring to release the shut-off arm. The lower end of the arm moves the governor linkage hook, rotating the metering valve to the closed position and cutting off the fuel, as shown in Figure 5-71B" End...
  19. H

    89 Navistar 7.3 idi----Learner Question

    Reading in a Stanadyne service bulletin. They begin discussing the solenoids on page 11 as ETR and ETSO, energized to run, and energized to shut off. The DB2 is an ETR which sort of makes it clear that an engine using this solenoid should NOT start even if it runs with the top on since the...
  20. H

    89 Navistar 7.3 idi----Learner Question

    Found this: Quote, "When the ignition is off, the solenoid is no longer energized and the return spring pulls the shut-off rack to the “OFF” position, which through the governor linkage rotates the metering valve to cut off fuel. End Quote...
  21. H

    89 Navistar 7.3 idi----Learner Question

    Woke up with this thought. (4am) The FSS is very strong in contraction when current is applied. When the current is cut off, the FSS plunger extends by a very weak spring. The spring is almost nothing. So what happens when the current is applied? The fuel is opened to the IP via a very strong...
  22. H

    89 Navistar 7.3 idi----Learner Question

    Tomorrow when there's good light I'll take a video with the throttle being actuated. That'll be later in the afternoon. I'll hang on hope until tomorrow but if the IP is gone, the IP is gone. If it is, I'm still thinking that the loss of power to the FSS could have resulted in catastrophic IP...
  23. H

    89 Navistar 7.3 idi----Learner Question

    Well, I've got to go to town tomorrow so I'll pick up a can of Seafoam to fill it with just to see. When the throttle is rotated, a shaft was going in and out. But I guess that's not the metering valve. I'll try some more tomorrow but the only way I could get anything in there to move back or...
  24. H

    89 Navistar 7.3 idi----Learner Question

    @Thewespaul I'm wondering if the metering valve is stuck. The seat the FSS arm sits in is in a different location on mine than on yours. Mine is much farther towards the back. I haven't figured out how to upload pics here since Google stopped showing them as a JPG but this link should take you...
  25. H

    89 Navistar 7.3 idi----Learner Question

    This is puzzling me bigtime. Is it possible to open the metering valve by hand with the cover off? I've tried to get something to move either forward or backward where the FSS arm sits and all feels rigid. Is the metering valve held in place when closed by a fairly strong spring?

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