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    6.9 to 7.3 glow plug harness

    I find the other EVTM diagrams easier to read than the large ones you posted. Your "start and glowplug control" is part of the EVTM. Here is a link to the whole 1986 EVTM diagram set. There are a few that are diesel only, and the rest of them sometimes have notes with diesel differences...
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    Clutch hitting safety switch

    To the original thread starter. Here is a picture that shows the switch. The switch in the lower part of the picture is the brake switch, but up in the middle it shows the starter interlock.
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    Clutch hitting safety switch

    I have to drive it everyday to work. What is really bad is I live right near the base on the far side, so every morning whatever vehicle I take, it's a cold start, go down the short driveway, and then a long hard pull on a cold engine till I get to the top. I try to be easy on them but what do...
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    Clutch hitting safety switch

    Is there a reason you want it to work? After a couple of episodes the past couple of years I am finding I do not like them. 1st episode. I was messing with the rear tank, and it had the broken shower head inside it. I ran out of fuel right in a bad spot on the mountain and it's a busy road...
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    We got a little recognition on YouTube

    He is not a expert and gets small things wrong sometimes, but thought these trucks were significant enough to include on his channel.
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    Anyone hotshot trucking in an IDI?

    Most of them do not have CDL's. So their combined weight ratings tags, trailer and truck, cannot exceed 26,000. That can be difficult, that relegates them to light bulky or smaller not very heavy loads. It's very easy to cross the 26,000 line. They can get the trailer manufacturer to put any...
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    Air shocks

    It puts a lot of strain on the frame shock mounts. And they do give a stiff ride when aired up. Here is a set that is supposed to fit. https://www.amazon.com/F-250-F-150-Monroe-Max-Air-Shocks/dp/B081B3KGS7
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    Anyone hotshot trucking in an IDI?

    It's my impression watching trucking videos lately, that hot shotting as a whole has been declining. Good thing you did not get into it. And the cops really like to hassle you more than the large trucks.
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    Brake lights, continue to not work?

    If you have separate amber turns, then ignore my post. Your truck has been re-wired, no one is going to be able to help you without knowing how the ambulance people wired it up. Did they simply cut the original green brake pedal switch wire going to the turn switch and run a new wire from the...
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    Brake lights, continue to not work?

    The problem with the brake lights, they are embedded and use the same wiring and bulbs as the rear turns. So when the brake lights do not work, do the rear signals both sides work? If they do, that means the bulbs and the wiring going to the rear are good. These all lead up to the turnsignal...
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    1988 f-350 7.3 IDI need help with wiring harness

    It only burnt up in the back? That should not be too hard to repair. I am going to redo my wiring back there anyway and mine never caught fire. I was going to go up the frame a little ways, and splice some new wires in place. I was going to use trailer wiring and trailer wiring color codes...
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    Manual swap

    I would not swap the column, I would keep your old auto column. I have no problems with using my old auto column. I took the lever off of it. And put a piece of black tape over the PRND2L indicator. As long as it's tied up it works fine. You can find a older column later if you wanted, but...
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    Manual swap

    Are you going to get the frontend also? If possible, I would try and at least get the front driveshaft and the front transfer case yoke. The front driveshaft has the double cardan joint in it. My f250 had a lift on it when I bought it, and it always had a bad vibration when in 4x4. I put the...
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    Manual swap

    I did a manual swap on my 89. Your 91 is like my 89, not sure if the pedals will swap. I know 1986-dwn will not swap. I used a 89 donor. The driveshaft was different. I could have used my auto driveshaft, but the 5 speed shaft was thicker and had larger u-joints. I had to swap the yoke on...
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    Glow plug amp draw

    https://www.oilburners.net/threads/how-much-voltage-drop-do-should-the-glow-plugs-cause.72240/
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    Glow plug amp draw

    I think you guys are way low. I seem to remember someone on here long ago did some testing and all of them together was a good bit over 100 amps, closer to 150 amps. That would explain why his 80 amp breaker is tripping.
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    Clutch wont disengage.. Need ideas!!

    Make sure there is plenty of fluid in the clutch master. Since you are driving it, if it's not completely dry any residual air will work it's way out. If it's a air problem you will not have hardly any resistance when you push the pedal. If you have resistance, it may simply be the clutch...
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    Speed control amplifier

    I think your assumption would be correct on the speed sensor. If the speedometer is working, then you would think the speed sensor input would be good. On the earlier trucks, they used a sensor in the speedometer cable. Those trucks actually had two speedometer cables, a short one from the...
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    Automatically priming fuel system hack

    Update on my china pump; Something is going on with it, it sounds terrible and the truck started but quit on me. I got it started later in the day and while it runs, the pump sounds awful, very loud not a calm click click. I need time, but I am going to pull it off and inspect it, and...
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    Speed control amplifier

    Many common places for failures. Your checks should have picked them up though. The electrical switches on the clutch pedal and the brake pedal commonly fail. And the slip rings behind the steering wheel are a common failure point. Easiest way to make sure the brake and clutch interlocks are...
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    Carter P4070 Electric fuel pump failures.

    That's true, diesel would most like make a mess just like a mechanical oil pressure gauge would. Gasoline would definitely be more exciting, more of a mess. Is anything not made in China anymore?
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    clutch master?

    Think of it like gear ratios or sprockets. Small gear or sprocket turning a large gear or sprocket has a lot of power, but has to turn many turns. So you have lots of power, but requires more travel distance. Big gear or sprocket turning a small gear or sprocket, you lose power but you gain...
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    Putting Oil Change into the Tank

    An experienced rebuilder can look at a pump and tell right away that dirty contaminated fuel has been run through it for awhile. The reason some rebuilders will not take a pump that WMO has been used in, it wears some expensive hard parts inside the pump that are normally not replaced. Most of...
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    Carter P4070 Electric fuel pump failures.

    That won't be cheap. Those electric fuel pressure gauges are expensive.
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    Carter P4070 Electric fuel pump failures.

    Be careful and read the wording on your lifetime warranty. I have found going back to some stores, the warranty is lifetime "replacement", not lifetime "replacements". Some stores do keep track of your receipts, which is a good thing when you lose it and need a warranty, but a bad thing when...

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