North American Turbocoupe Organization



Low Oil Pressure?
ianbfromct Offline
Senior Member
#1
I dont have the greatest and most reliable dash cluster so im hoping it might just be a bad gauge or sensor. Is there anyway to check the oil pressure without buying and connecting a whole new gauge? Its pretty low psi and it doesnt smoke at all.
88 5 speed TC
-3" DP,lowered, 255 Walbro, Gillis valve, Cobra R's, bondo/rust, Stinger's PIMP Ecu
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TurboE Offline
Posting Freak
#2
In my personal experience, the stock cluster oil pressure gauge always looked low for me. You can verify your oil is at the correct level to start. You can always buy an aftermarket oil sensor and gauge at summitracing.com. The stock sensor is installed off of the head close to the firewall next to the lower intake manifold. Normally the only way to fix low oil pressure is to replace the pump, or and normally the reason is replacing the worn bearings. Sometimes you can help by running thicker oil, or higher mileage oil. Personally I always ignored my stock gauge. I trust the aftermarket gauge though.
-88 TC Black
5spd, Precision SC50 T3/T4, QH/SD Tune, Gillis, AFPR, 255FP, WB O2, K&N, Ported E6, 3" DP, ATR 2.5" Duals, 3:73 Rear, Konis, Eibachs, 18" Voxx Wheels, X Drilled Rotors.
-06 G35 Coupe Diamond Graphite
-97 Pathfinder
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ianbfromct Offline
Senior Member
#3
Do you unplug the factory wire going to the sensor and run the extra gauge with that wire? Or do you add an additional sensor?
88 5 speed TC
-3" DP,lowered, 255 Walbro, Gillis valve, Cobra R's, bondo/rust, Stinger's PIMP Ecu
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TurboE Offline
Posting Freak
#4
An addtional sensor and gauge. Maybe someone on here will know what the voltage/resistance will equal in psi, and you could check that? Someone else might have some better info but to me, you can either get a gauge or maybe a shop can do a pressure test?? or be ok with what it reads and ignore it? I did that latter, because at the time I didn't have the money to do anything else but hope it was ok, and after a while I learned its a pretty common issue that the gauge just reads low... but if you want to know for sure you might have to spend some money.

http://www.summitracing.com/parts/atm-3327
-88 TC Black
5spd, Precision SC50 T3/T4, QH/SD Tune, Gillis, AFPR, 255FP, WB O2, K&N, Ported E6, 3" DP, ATR 2.5" Duals, 3:73 Rear, Konis, Eibachs, 18" Voxx Wheels, X Drilled Rotors.
-06 G35 Coupe Diamond Graphite
-97 Pathfinder
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Pete D Offline
Posting Freak
#5
The stock oil and temp gauges can be inaccurate. Sometimes the oil reads lower and lower as the sending unit begins to fail, but they don't always fail in this manner. Try pulling the wire to the sending unit, on and off a couple times to clean the connection. If the pressure doesn't read higher, try replacing the sending unit. When you get the old unit off (try a 9/16" crows foot wrench)
See if you can borrow a screw in mechanical gauge and check the actual oil pressure after it thoroughly warms up. Then put a new sending unit on.
Pete Dunham
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Stang8u Offline
Senior Member
#6
The stock sender has a pin hole it is very easily clogged .... Try that first

How menny miles on the motor low oil also indacates worn bearings

My stock gauge read high the autometer gauge I put in reads about 60 psi so if the gauge is acuret you have real low oil pressure
:mad:
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EJ Offline
Member
#7
I had the same problem last year - Pete D and Several great folks gave me similar "Trouble shooting' tips.

Information was right on the money

My result -

First:

Checked OP Sending Unit Wire for O A Condition & Integrity -

Good


Second:

Cleaned Off Contact on OP Sending Unit -

Still Low Reading

Third:

Removed Original Unit - Continuity Check was OK -

Cleaned OP input and CAREFULLY Cleaned Block Area at Sending unit block input point

Reinstalled Unit

OP Reading MARGINALLY Better -

Fourth:

Rock Auto - Ordered New Motorcraft OP Sending Unit - Installed

Problem Solved

Full Disclosure -

We, son and I, are running Completely Stock 2.3 Turbo - Engine

Just Turned 33,675 Original One Owner Miles

Oil - Castrol Synthetic -

My two cents and recent actual experience

EJ

1988 TC - T5 Stock - Original Owner
1986 SVO - Original Owner-
2013 Fusion Titanium - Eco Boost AWD
2012 JEEP Liberty - Son's DD
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Stang8u Offline
Senior Member
#8
Yea I'm not a bird exspert but I do know a lot about fox mustangs and have had this problem with a lot of them

The sender is clogged or bearings are worn
:mad:
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ianbfromct Offline
Senior Member
#9
I think im gonna order a new pressure sending unit just to rule that out since its kinda cheap.
88 5 speed TC
-3" DP,lowered, 255 Walbro, Gillis valve, Cobra R's, bondo/rust, Stinger's PIMP Ecu
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ianbfromct Offline
Senior Member
#10
Threw on a new pressure sending unit and yep its good now..I feel much better about modding my 170k engine now lol
88 5 speed TC
-3" DP,lowered, 255 Walbro, Gillis valve, Cobra R's, bondo/rust, Stinger's PIMP Ecu
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