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Old 05-28-2024, 10:51 AM   #1
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7.3 hiccup?

Hey Guys,

My van was sitting for 2 weeks ( which isn’t unusual), and I decided to take it out for a grocery store trip. I noticed there was some tranny fluid leaking near the 4x4 driveshaft. No biggie. I checked the tranny dipstick while it was warmed up and in neutral, and it looked fine, maybe a bit overfilled if anything. After that, I decided to do a “blow by” test too because I just learned how to do it. That test looked fine as well.

After all this, I pull onto the Main Street and notice my “low fuel” light turned off. I turn right to the grocery store, all of a sudden during the turn, my van basically stalls out and lurches forward. The battery and oil temperature/level light came on momentarily during this stall. After the stall, the van was fine but I immediately drove it back to my house.

What kind of transmission issue is this, and how fuked am I?

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Old 05-28-2024, 12:37 PM   #2
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Low Fuel Light? Was the fuel level low?
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Old 05-28-2024, 05:18 PM   #3
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I don’t think it’s a transmission issue, at least let’s hope not, I suspect your oil may be low, which would cause a sputter/surge/stall, did you check oil level when you checked trans level? Also, make sure your neg/pos battery cables are both tightened down.
Ya, I don’t get the fuel light thing, it was on then went off? Low fuel?
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Old 05-28-2024, 09:45 PM   #4
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To clarify about the fuel thing.

I had very low fuel. Low fuel light was on.
Low fuel light was present during the spasm.
I wasnt on any kind of hill or making sharp enough of a turn to trip the low fuel indicator.
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Old 05-28-2024, 10:11 PM   #5
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Sounds very much like an air suck on the fuel line. Diesels hate air in the fuel line. I think diesel owners only ever run out of fuel once in their lives. lol!
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Old 05-29-2024, 12:03 AM   #6
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Ya, go fill up with some fresh dino juice and step on it
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Old 06-05-2024, 11:45 PM   #7
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[/B]update[/B]
Van almost didn’t start but I shifted it back and fourth from drive to park and that seemed to do the trick. Filled it up immediately lol. Trans fluid leaking must be a completely different problem for sure. Thanks for your help guys!
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Old 06-09-2024, 07:06 PM   #8
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I hope adding fuel resolves the issue but if you find this happens again I have a couple other common issues you could be looking at and I've dealt with both on my 7.3.

The fuel pickup is prone to breaking off and then you really can't pull fuel below about a, 1/4 tank. I discovered my problem as I have a fuel pressure gauge and noticed fluctuating between zero and normal when I was around a 1/4 tank depending on hills or acceleration/braking. Great time to do Hutch and Harpoon mods and add a midship fuel filter.

Second, could be the infamous CPS sensor cutting out. If the problem returns on a full tank this could be likely.

Hope this helps!
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