New owner
Cargo Master
Joined: Oct 2007
Posts: 2,712
Likes: 107
From: BoCoMo
, bad HPOP hose... out goes the oil and truck coasts to a stop.I am reading off of a Ford Tech break down that is looking into why the oil light comes on and why the needle drops. The questioners truck to the Ford Tech, also ran seemly fine. The Tech was looking first into if there was a fluctuation of oil pressure and why.
I will go with SkySkiJason and say your gauge is malfunctioning.....
(which may be due to low oil pressure 
, or not)
Hotshot
Joined: Jul 2008
Posts: 12,782
Likes: 2,142
From: N.GA Mountains
It is not going to be due to low oil pressure.
I have seen that gauge or sensor malfunction plenty of times. Including currently on my own junk. It’s not a reliable diagnostic tool.
On trucks, the wire or sensor often get damaged by people laying on it to access engine. I’ve tried to forget what is happening in that area on a van, but I suspect it’s vulnerable because of tight quarters.
I would definitely visually check wires and sensor before hooking up a mechanical gauge.
Gauge is pretty easy though. The plug on top of HPO reservoir is a #4 ORB just like the fuel bowl plug we pull for fuel pressure sending unit. I keep a gauge/hose on the ORB to NPT adapter for checking fuel pressure or oil pressure (on a no-start truck).
I have seen that gauge or sensor malfunction plenty of times. Including currently on my own junk. It’s not a reliable diagnostic tool.
On trucks, the wire or sensor often get damaged by people laying on it to access engine. I’ve tried to forget what is happening in that area on a van, but I suspect it’s vulnerable because of tight quarters.
I would definitely visually check wires and sensor before hooking up a mechanical gauge.
Gauge is pretty easy though. The plug on top of HPO reservoir is a #4 ORB just like the fuel bowl plug we pull for fuel pressure sending unit. I keep a gauge/hose on the ORB to NPT adapter for checking fuel pressure or oil pressure (on a no-start truck).
Thread Starter
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Cross-Country
Joined: Feb 2021
Posts: 93
Likes: 2
i think normal for that light to come on and go off when starting (upper left by fuel gauge)
Very good question. Was this after the 'wait to start' light went out and before you 'started' the truck??? or was the truck running??
Are you able to test for any tripped codes?
Very good question. Was this after the 'wait to start' light went out and before you 'started' the truck??? or was the truck running??
Are you able to test for any tripped codes?
I have a snap on solus here at work I am going to check it out .
The light is on from when I start the truck and stays on if I drive and the pressure gauge stays on low.
It fires first crank no issue and runs fine . No misses and no running issues at all .
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Cross-Country
Joined: Feb 2021
Posts: 93
Likes: 2
Cargo Master
Joined: Mar 2019
Posts: 2,907
Likes: 788
From: Kinnula,Finland
Looks like cheapest dongle that misses most of the parts to work properly.
BAFX dongle is the minimum to get connection.
Or OBDlink the top notch.
BAFX dongle is the minimum to get connection.
Or OBDlink the top notch.
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Cargo Master
Joined: Oct 2007
Posts: 2,712
Likes: 107
From: BoCoMo
Since it looks with very good certainty that there is good oil pressure. 
The Ford Tech sheet that I looked at yesterday said that if there is a short in a wire and was touching all the time the light would ground and stay on all of the time. The light goes out as the gauge line goes up. The tech also said that the next thing to change out and look to would be a sensor that has failed/failing.
(I know that I am repeating what has already been said)
The Ford Tech sheet that I looked at yesterday said that if there is a short in a wire and was touching all the time the light would ground and stay on all of the time. The light goes out as the gauge line goes up. The tech also said that the next thing to change out and look to would be a sensor that has failed/failing.
(I know that I am repeating what has already been said)
Thread Starter
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Cross-Country
Joined: Feb 2021
Posts: 93
Likes: 2
Since it looks with very good certainty that there is good oil pressure.
The Ford Tech sheet that I looked at yesterday said that if there is a short in a wire and was touching all the time the light would ground and stay on all of the time. The light goes out as the gauge line goes up. The tech also said that the next thing to change out and look to would be a sensor that has failed/failing.
(I know that I am repeating what has already been said)
The Ford Tech sheet that I looked at yesterday said that if there is a short in a wire and was touching all the time the light would ground and stay on all of the time. The light goes out as the gauge line goes up. The tech also said that the next thing to change out and look to would be a sensor that has failed/failing.
(I know that I am repeating what has already been said)
Lead Driver
Joined: Jul 2017
Posts: 6,864
Likes: 2,336
From: WV
You can make a AIH delete plug out of a Cummins oil drain plug if you don’t want to wait. I don’t remember the details but I did that on my previous OBS.
Hotshot
Joined: Jul 2008
Posts: 12,782
Likes: 2,142
From: N.GA Mountains
M22-1.5 - it’s on the shelf at the local autoparts. Should be able to get them down to about $5 for it.
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Cross-Country
Joined: Feb 2021
Posts: 93
Likes: 2
So far 200 miles and I have checked under the hood and van everytime I have gotten out to make sure everything is working as it should. Tonight I got back from work and there was a massive spray of oil under the hood. The oil pressure sensor has blown and is coming out through the plug so I ran to Advanced and changed the sensor in the parking lot. Drove 40 miles to my hockey game and back and all was good no more leaking.
I have bellows pipes, EPV delete, OEM o rings for pedestal, air intake heater delete on order, and 4 inch down pipe on coming my way.
Now I am looking for a complete kit to reseal the entire fuel filter housing, and change out any high pressure fuel and oil lines that are in the valley with upgraded lines as I only want to do this once and be done.
Is there a door sticker to find out and decode what rear differential I have? I want to pick up all the fluids I need this weekend.
Any sensors I should replace while I have the whole area open? Ill be towing sometimes 5 to 12 hours away and a breakdown could cost me a ton of time and money put out on racing so I am willing to spend it now to prevent any in route delays.
It's a Van Gogh
Joined: Feb 2010
Posts: 7,813
Likes: 1,335
From: Elk Grove, CA
Thread Starter
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Cross-Country
Joined: Feb 2021
Posts: 93
Likes: 2
Exactly what sensor? Got a part number?
Big sack of o rings.
No such thing as high pressure fuel lines on a 7.3. Upgraded fuel lines, yes. And HPOP lines too. Highly recommended.
VIN decoder should tell the tale on that.
For sensors OE Ford or IH is strongly recommended. ICP if not already replaced. Inspect the exhaust back pressure sensor, they can get clogged with soot and give false readings. Mostly just fix what's broke.
Big sack of o rings.
No such thing as high pressure fuel lines on a 7.3. Upgraded fuel lines, yes. And HPOP lines too. Highly recommended.
VIN decoder should tell the tale on that.
For sensors OE Ford or IH is strongly recommended. ICP if not already replaced. Inspect the exhaust back pressure sensor, they can get clogged with soot and give false readings. Mostly just fix what's broke.
