Engine oil pressure?

[Bill W]

Does anyone do the flooded start method to build oil pressure prior to starting. Basically hit the on/start button without touching the brake pedal. This will bring up the gauges and let you see the oil pressure. Next put your foot on the brake pedal and hold the gas pedal all the way down. This will allow the engine and oil pump to prime the oil galleries. The starter turns the engine about 300 RPM. 2-3 seconds and the oil pressure gauge shows 21.8PSI. Let your foot off of the gas pedal and the engine starts. I really don’t think the fuel injectors open until you let off of the gas pedal. I hope it doesn’t. Anyway can someone comment please.

That is what I did after changing my oil. Must do to get oil PSI in the filter. Called “clear flood mode”. I did not know that trick about calling up the gauges, thanks.

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[DanielRayJ]

That is what I did after changing my oil. Must do to get oil PSI in the filter. Called “clear flood mode”. I did not know that trick about calling up the gauges, thanks.

I am curious where the Oil Pressure Sending Unit is, does anyone know? There is a guy on here that pulled some Oil Pressure Data after installing the Baxter Filter Relocation Adapter.

 

[OxygenMask]

Does anyone do the flooded start method to build oil pressure prior to starting. Basically hit the on/start button without touching the brake pedal. This will bring up the gauges and let you see the oil pressure. Next put your foot on the brake pedal and hold the gas pedal all the way down. This will allow the engine and oil pump to prime the oil galleries. The starter turns the engine about 300 RPM. 2-3 seconds and the oil pressure gauge shows 21.8PSI. Let your foot off of the gas pedal and the engine starts. I really don’t think the fuel injectors open until you let off of the gas pedal. I hope it doesn’t. Anyway can someone comment please.

Why would you feel the need to do this?
Perhaps after an oil change, or if it hasn't been started in 6 months?

 

[DanielRayJ]

Why would you feel the need to do this?
Perhaps after an oil change, or if it hasn't been started in 6 months?

Well after hearing my 2025 Ford Ranger Raptor Cold Start with the hood up. I was alarmed. So I started looking into the failures associated with Ford motors and found quite a bit of information. Cam Phasers and Lifter Failures due to low or no oil pressure on startup.

 

[Jason B]

Does anyone do the flooded start method to build oil pressure prior to starting. Basically hit the on/start button without touching the brake pedal. This will bring up the gauges and let you see the oil pressure. Next put your foot on the brake pedal and hold the gas pedal all the way down. This will allow the engine and oil pump to prime the oil galleries. The starter turns the engine about 300 RPM. 2-3 seconds and the oil pressure gauge shows 21.8PSI. Let your foot off of the gas pedal and the engine starts. I really don’t think the fuel injectors open until you let off of the gas pedal. I hope it doesn’t. Anyway can someone comment please.

No need to. It takes 0.5 secs to prime the system. I'm not going to stress the starter or battery (or myself) any more than necessary.
Besides, my truck is on a schedule and already running before I even get in it.

 

[jburl2]

This is super handy info to witness. This is what I leave it on, on my dash readout. This is my readout at idle. Gives you realtime readouts & fluctuations on the fly. Here’s how you get to it. All through the steering wheel.
Hope this helps.

If you get the Procal, there is a realtime psi gauge you can select to monitor oil pressure in numbers. It is showing higher psi than the factory truck gauges are on my RR. Idle is 35 to 40 psi. When I'm on it, it goes up above 60 psi.

 

[They Call Me Bruce]

I think the numbered display for oil and temp is a Raptor exclusive.

That is frigging ridiculous, my 2014 jeep has a damn numerical pressure gauge.

 

[Buellsox]

If you get the Procal, there is a realtime psi gauge you can select to monitor oil pressure in numbers. It is showing higher psi than the factory truck gauges are on my RR. Idle is 35 to 40 psi. When I'm on it, it goes up above 60 psi.

Did not know that…and I have the Procal Tune, but don’t run the digital info box. Never mounted it in the truck and it’s just back in the box. Might be worth adding to the interior.
How do you have yours mounted? Or have it in your rig?

 

[ryanO]

Does anyone do the flooded start method to build oil pressure prior to starting. Basically hit the on/start button without touching the brake pedal. This will bring up the gauges and let you see the oil pressure. Next put your foot on the brake pedal and hold the gas pedal all the way down. This will allow the engine and oil pump to prime the oil galleries. The starter turns the engine about 300 RPM. 2-3 seconds and the oil pressure gauge shows 21.8PSI. Let your foot off of the gas pedal and the engine starts. I really don’t think the fuel injectors open until you let off of the gas pedal. I hope it doesn’t. Anyway can someone comment please.

Huh!? This sounds like crazy internet BS. I'm not sure its accurate that this actually happens and even if it does, its insane to me to think one would do this. It's not extending the life of one's engine.

 

[DanielRayJ]

Huh!? This sounds like crazy internet BS. I'm not sure its accurate that this actually happens and even if it does, its insane to me to think one would do this. It's not extending the life of one's engine.

I have read about this and tried it and what I wrote was accurate. If anyone is uninformed or chooses to be willfully ignorant then it will show.
Clear flood mode is a diagnostic feature in modern fuel-injected engines that prevents fuel injectors from spraying, allowing the engine to crank without starting. It is activated by pressing the gas pedal to the floor (over 80% throttle) and holding it there while cranking, which helps clear excess fuel in a flooded engine or build oil pressure after oil changes.
Purpose of Clear Flood Mode

• Fixing a Flooded Engine:
  If an engine has excessive fuel, this mode cranks the engine, drying out the spark plugs and clearing the excess fuel without adding more, as described by EricTheCarGuy.
• • Priming Oil System: As discussed in this Subaru Mechanics Facebook post, it is used after an oil change to build oil pressure before the engine fires, protecting against dry starts.

 

[ryanO]

I have read about this and tried it and what I wrote was accurate. If anyone is uninformed or chooses to be willfully ignorant then it will show.
Clear flood mode is a diagnostic feature in modern fuel-injected engines that prevents fuel injectors from spraying, allowing the engine to crank without starting. It is activated by pressing the gas pedal to the floor (over 80% throttle) and holding it there while cranking, which helps clear excess fuel in a flooded engine or build oil pressure after oil changes.
Purpose of Clear Flood Mode

• Fixing a Flooded Engine:
  If an engine has excessive fuel, this mode cranks the engine, drying out the spark plugs and clearing the excess fuel without adding more, as described by EricTheCarGuy.
• • Priming Oil System: As discussed in this Subaru Mechanics Facebook post, it is used after an oil change to build oil pressure before the engine fires, protecting against dry starts.

...."it will show". How? When? What's gonna happen or not happen?

 

[DanielRayJ]

...."it will show". How? When? What's gonna happen or not happen?

You’re the one that called “BS” and you have your own opinion. Fine to each his own. I was asking for an opinion with some added technical value. You just added really nothing. That is what shows.

 

[ryanO]

You’re the one that called “BS” and you have your own opinion. Fine to each his own. I was asking for an opinion with some added technical value. You just added really nothing. That is what shows.

Theres no "dry start" after an oil change. Unless one is somehow forcibly pushing oil out of the engine and oil pump during an oil change, there's FAR more chance of "dry start" after a vehicle has sat for hours/overnight.
The entire premise of the priming after an oil change is foolery. Not to mention, if anyone is going to suggest there is some damage done without this process (at any time), they would then be forced to calculate how much and exactly how that affects an engine over time. So if one doesn't do this process will your engine last 1000 miles less? 100 miles less? Whats the number or outcome? That's impossible to calculate.
That's why this whole thing is nutty. Some operations person or "problem for every solution" nut job thought this up.

If anyone wants to do it thats fine, its just a waste of time and effort.

 

[DanielRayJ]

Theres no "dry start" after an oil change. Unless one is somehow forcibly pushing oil out of the engine and oil pump during an oil change, there's FAR more chance of "dry start" after a vehicle has sat for hours/overnight.
The entire premise of the priming after an oil change is foolery. Not to mention, if anyone is going to suggest there is some damage done without this process (at any time), they would then be forced to calculate how much and exactly how that affects an engine over time. So if one doesn't do this process will your engine last 1000 miles less? 100 miles less? Whats the number or outcome? That's impossible to calculate.
That's why this whole thing is nutty. Some operations person or "problem for every solution" nut job thought this up.

If anyone wants to do it thats fine, its just a waste of time and effort.

Gravity forces the engines lube oil to the oil pan. My 3.0L engine has to run without pressure briefly. Ford, GM, Chrysler, etc have all had issues related to lubrication. And so there is a HUGE repair market. These “issues”are engineered to support that market.

A “dry start” after an oil change means the engine runs briefly without proper oil pressure or lubrication right after startup.
Here’s what’s happening:
When you drain the oil, it empties from the oil pan and partially from passages and the oil filter
If the new oil hasn’t fully circulated yet, the engine starts with metal parts not fully coated in oil
For a few seconds, components like bearings, camshafts, and lifters may run with minimal lubrication
That short window = dry start

 

[ryanO]

Gravity forces the engines lube oil to the oil pan. My 3.0L engine has to run without pressure briefly. Ford, GM, Chrysler, etc have all had issues related to lubrication. And so there is a HUGE repair market. These “issues”are engineered to support that market.

A “dry start” after an oil change means the engine runs briefly without proper oil pressure or lubrication right after startup.
Here’s what’s happening:
When you drain the oil, it empties from the oil pan and partially from passages and the oil filter
If the new oil hasn’t fully circulated yet, the engine starts with metal parts not fully coated in oil
For a few seconds, components like bearings, camshafts, and lifters may run with minimal lubrication
That short window = dry start

I understand what is suggested. The idea that there is a repair market for anything that is a result of the described "issue" is laughable at best.
Even if one is convinced that there are "dry starts", it's uninformed speculation and completely impossible to say any issue is caused by it.
Again, only operations people push this stuff because they LOVE to dogmatically say there are problems when they can't be proven.

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