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08-31-08, 03:32 PM
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#1 (permalink)
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Site Addict
Join Date: Sep 2005
Location: Western AZ
Posts: 1,821
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62 Oil pressure sending unit...
My oil pressure gauge quit, checked the OPSU, and it's case had corroded through while hidden under the rubber boot. No biggy. Ordered another one from Kurt along with some other stuff.
Problem is, my gauge doesn't work after the new one found it's new home.
I get 12.3v at the wire terminal, (about a .3v drop from batt voltage) and the gauge pegs high when wire grounded. The OPSU is grounded properly, as I have continuity between the case and the neg batt terminal.
My questions are; How do I test this brand new OPSU before ruling it DOA, and is there something obvious I'm overlooking. I know very well I could install a mech gauge, just looking to get the stocker working for now. 
__________________
The 2nd amendment...for when all the other amendments fail.
The desert dwellin, roadrunner chasin, soooper-genius!
'90 FJ 62, '08 Scion head unit, chopped quarters and rockers, 1" DIY body lift, bedlined exterior, and mostly stock. My soft wheeler and DD.
'85 Dodge Ramcharger a little built, and a little beat. She's looking long in the tooth lately.
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09-01-08, 11:34 AM
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 cruiser88
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This message has been deleted by cruiser88.
Reason: wrong set of instrutions
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10-07-08, 03:39 PM
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#2 (permalink)
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Site Addict
Join Date: Sep 2005
Location: Western AZ
Posts: 1,821
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I've just gotten back around to addressing this. Any insights, fellas?
__________________
The 2nd amendment...for when all the other amendments fail.
The desert dwellin, roadrunner chasin, soooper-genius!
'90 FJ 62, '08 Scion head unit, chopped quarters and rockers, 1" DIY body lift, bedlined exterior, and mostly stock. My soft wheeler and DD.
'85 Dodge Ramcharger a little built, and a little beat. She's looking long in the tooth lately.
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10-07-08, 07:19 PM
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#3 (permalink)
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250+ Club
Join Date: Jul 2007
Location: Downingtown, PA
Posts: 420
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Very interested in this thread since my oil pressure is always over 3/4 on the guage, even after new sensor. Anyone?
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10-07-08, 07:26 PM
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#4 (permalink)
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Forum Lifer
Join Date: Oct 2007
Location: Plano texas
Posts: 2,526
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I think you need to replace your fuel gauge too.
__________________
Mike Hanson
1982 FJ40
1987 FJ60
3 x 1988 FJ62
1989 FJ62
1991 FJ80
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10-07-08, 10:11 PM
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#5 (permalink)
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Site Addict
Join Date: Sep 2005
Location: Western AZ
Posts: 1,821
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Quote:
Originally Posted by Michael Hanson
I think you need to replace your fuel gauge too.
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Huh?
(And yes, I know the story on the related issue of a wonky fuel gauge...don't think it applies here as the fuel gauge has never misbehaved). The oil pressure gauge appears to work, as it falls dead without a ground, pegs with grounding, and 12v gets to the sending unit. However, I'm surely willing to learn, if there's something I've missed.
__________________
The 2nd amendment...for when all the other amendments fail.
The desert dwellin, roadrunner chasin, soooper-genius!
'90 FJ 62, '08 Scion head unit, chopped quarters and rockers, 1" DIY body lift, bedlined exterior, and mostly stock. My soft wheeler and DD.
'85 Dodge Ramcharger a little built, and a little beat. She's looking long in the tooth lately.
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10-07-08, 11:11 PM
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#6 (permalink)
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Terminal Lurker
Join Date: Mar 2005
Location: SF
Posts: 202
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I had the same thing a few years ago. First was the OPSU. Then they ended up replacing the gauge. It's been fine ever since....
-m
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10-08-08, 07:11 AM
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#7 (permalink)
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Site Addict
Join Date: Feb 2006
Location: SoCal
Posts: 2,121
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If the wire from the OPSU touched ground it kills the gauge. So theoretically if the OPSU goes bad and goes straight to ground, it will fry then gauge as well.
Dynosoar 
__________________
'82 V8J60 - TPI 350 with a 700R4 attached to a splitcase, Cable Locker FF rear end, 4" SUA (National Spring), Copper Metalic Has been south to Cabo San Lucas, BCS and North to Port Angels,WA.
Call Sign: KI6SMP
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10-08-08, 07:28 AM
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#8 (permalink)
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250+ Club
Join Date: Feb 2003
Location: WI
Posts: 905
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My 62 is supposed to have oil pressure?
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http://www.wohva.com Wisconsin Off Highway Vehicle Association
http://www.lenzauto.com Need a truck?
BDS suspension dealer
1990 FJ62 with one black eye
2001 Honda Odyssey EX
1997 Toyota 4Runner SR5
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10-08-08, 10:33 AM
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#9 (permalink)
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Site Addict
Join Date: Sep 2005
Location: Western AZ
Posts: 1,821
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Quote:
Originally Posted by Dynosoar
If the wire from the OPSU touched ground it kills the gauge. So theoretically if the OPSU goes bad and goes straight to ground, it will fry then gauge as well.
Dynosoar |
I agree. Mine still responds appropriately when grounded/ungrounded, so I hope that's enough to rule a dead gauge out.
I have a little time today to quit e-wrenching and to actually eyeball the truck some more. I'll see how it goes soon enough, I suppose. 
__________________
The 2nd amendment...for when all the other amendments fail.
The desert dwellin, roadrunner chasin, soooper-genius!
'90 FJ 62, '08 Scion head unit, chopped quarters and rockers, 1" DIY body lift, bedlined exterior, and mostly stock. My soft wheeler and DD.
'85 Dodge Ramcharger a little built, and a little beat. She's looking long in the tooth lately.
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10-23-08, 06:57 PM
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#10 (permalink)
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250+ Club
Join Date: Jul 2007
Location: Downingtown, PA
Posts: 420
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Any progress??
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10-24-08, 12:58 AM
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#11 (permalink)
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Site Addict
Join Date: Sep 2005
Location: Western AZ
Posts: 1,821
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Quote:
Originally Posted by rfj62
Any progress??
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yep. Testing info for the gauge and sender is in the body and chassis fsm. Next time I get to it, I'll test it out.
__________________
The 2nd amendment...for when all the other amendments fail.
The desert dwellin, roadrunner chasin, soooper-genius!
'90 FJ 62, '08 Scion head unit, chopped quarters and rockers, 1" DIY body lift, bedlined exterior, and mostly stock. My soft wheeler and DD.
'85 Dodge Ramcharger a little built, and a little beat. She's looking long in the tooth lately.
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