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#4491003 - 08/17/17 12:20 PM Ford dummy oil pressure guage
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
Does the oil pressure gauge ever register "H" if warranted or is it just simple you have some threshold or you don't.


Edited by wwillson (08/17/17 08:41 PM)
Edit Reason: spelling

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#4491030 - 08/17/17 12:41 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
RF Overlord Offline


Registered: 11/08/03
Posts: 3756
Loc: Cape Cod, MA
As long as you have at least ~6 lbs of pressure, it will always read exactly the same. If you drop below the threshold, it will read zero (or L or whatever is all the way at the bottom).
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Supercharged '03 Mercury Marauder - Trilogy Motorsports #61
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'00 Grand Marquis GS - daily driver
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#4491046 - 08/17/17 12:55 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
What wud be the desired oil pressure at hot idle for this engine and if not 6 i wonder if that is the correct threshold for dummy display.
_________________________
1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0

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#4491061 - 08/17/17 01:17 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1658
Loc: Crawfordville FL
Gauge
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2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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#4491069 - 08/17/17 01:26 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
meborder Offline


Registered: 04/27/14
Posts: 839
Loc: SD - South Dakota
Generally speaking, the 3v modulars need 25psi at hot idle for the phasers to work correctly. Less than that will cause issues.

They set the gauge threshold at 6psi so they NEVER have someone coming in to complain about low oil pressure.
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Too many cars using too many different oils to list in 150 characters.

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#4491077 - 08/17/17 01:35 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
6 to 25 thats a lot of margin ford put in.

Especially given that its a lower bound kinda number.
Cold or hot start op >> hot idle op
Driving hot or cold op >> hot idle op
_________________________
1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0

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#4491092 - 08/17/17 01:46 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
RF Overlord Offline


Registered: 11/08/03
Posts: 3756
Loc: Cape Cod, MA
Originally Posted By: merconvvv
What wud be the desired oil pressure at hot idle for this engine and if not 6 i wonder if that is the correct threshold for dummy display.
In general, you should have about 25 lbs at idle, but that will vary based on oil grade used, how old the oil is, temperature, idle RPM, etc. I think 15 is about the minimum you should have with a good motor.

Not sure what you mean about the "correct" threshold for the dummy display. I told you how the gauge works in my first reply. meborder summed it up nicely: "They set the gauge threshold at 6psi so they NEVER have someone coming in to complain about low oil pressure."


Edited by RF Overlord (08/17/17 01:50 PM)
_________________________
Supercharged '03 Mercury Marauder - Trilogy Motorsports #61
PP 5W-30 / MC FL820S

'00 Grand Marquis GS - daily driver
MC 5W-20 / MC FL820S

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#4491110 - 08/17/17 02:02 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
NEVER was the keyword i shud have focused on smile
Thanks
_________________________
1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0

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#4491130 - 08/17/17 02:23 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
RF Overlord Offline


Registered: 11/08/03
Posts: 3756
Loc: Cape Cod, MA
Realistically, few people, other than those who haunt BITOG, have any idea how a car works, and especially have no idea how oil pressure is supposed to behave. For this reason, Ford chose to make a gauge that always says "Everything's fine. Nothing to see here. Go about your business, citizen." This hopefully keeps at least some of the ignorant and uninformed from clogging up their service bays with non-existent problems during warranty. After that, Ford could care less.
_________________________
Supercharged '03 Mercury Marauder - Trilogy Motorsports #61
PP 5W-30 / MC FL820S

'00 Grand Marquis GS - daily driver
MC 5W-20 / MC FL820S

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#4491148 - 08/17/17 02:45 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
Trav Offline


Registered: 11/20/06
Posts: 18885
Loc: MA, Mittelfranken.de
Think of it as an idiot light On/Off that's it. There is a mod to make it show the actual pressure swings, google.
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#4491164 - 08/17/17 03:02 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
Humm wonder if you can get a different sensor (plug n play) that comes on at about 15 instead of 6. Not a true op guage but better than 6.
_________________________
1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0

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#4491165 - 08/17/17 03:03 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
I have actually never, ever, ever heard of a 4.6 suffering from "low oil pressure" problems.
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"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4491166 - 08/17/17 03:03 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
CR94 Offline


Registered: 03/20/16
Posts: 1120
Loc: Western S.C. since 1996
So it's nothing but a disguised equivalent of an idiot light, except without the glow to wake you up in case of loss of pressure? Boy, is that dumb!
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2011 Toyota Prius now at 88K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
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#4491168 - 08/17/17 03:04 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: merconvvv
Humm wonder if you can get a different sensor (plug n play) that comes on at about 15 instead of 6. Not a true op guage but better than 6.


Sure. Napa sells them in many pressure settings.
Just have to find the right thread, and will have to change the electrical connection.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4491170 - 08/17/17 03:07 PM Re: Ford dummy oil pressure guage [Re: merconvvv]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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