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 Re: Oil Pressure Gauge not working
[Re: dcg9381]
#734607
07/01/06 10:48 PM
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Joined: Oct 2000
Posts: 669
Rock Warrior
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Another side note: I tested a factory SR5 today
(1985 pickup) - oil pickup was in a different location over my 1988 (lower). It's not a variable resistance sender, it does seem to do something with continuity like the FSM suggests.
22REturbo.net 1988 4Runner 22RTE core, turbocharged, megasquirted...
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Re: Oil Pressure Gauge not working
[Re: dcg9381]
#734608
08/09/06 02:41 AM
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Joined: Oct 2000
Posts: 669
Rock Warrior
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For reference: I've found 3 types of senders. Left to right: 1) "Switch" idiot light. Do not use this with a pressure gauge (SR5) 2) pressure sender - From an 87 SR5 4 runner. FSM says that this should cause a test light to "blink" when grounding to it. 3) pressure sender.. This one is from an 86 22RTE turbo pickup, it's also similar in design to what I've been buying aftermarket. It won't work with my gauge cluster, but resistance does vary with oil pressure (lower resistance = more oil pressure) ![[Linked Image]](http://lakebox.dnsalias.com/photos/1988%204runner/engine/oil/oilpressuresender.jpg)
22REturbo.net 1988 4Runner 22RTE core, turbocharged, megasquirted...
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Re: Oil Pressure Gauge not working
[Re: dcg9381]
#734609
08/14/06 09:08 PM
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Joined: Oct 2000
Posts: 669
Rock Warrior
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More notes.. for my application - unknown yr speedo/tach - square background - 110mph speedometer:
Oil pressure starts to come up with 12-2 ohms resistance (low to high indications).
The sender I'm using has no pressure resistance of about 80 ohms... This would be one way to test.
22REturbo.net 1988 4Runner 22RTE core, turbocharged, megasquirted...
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Re: Oil Pressure Gauge not working
[Re: dcg9381]
#734610
08/14/06 09:09 PM
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Joined: Aug 2001
Posts: 2,941
J Roll Me Over
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More notes.. for my application - unknown yr speedo/tach - square background - 110mph speedometer:
1986
"A young man who does not have what it takes to perform military service is not likely to have what it takes to make a living." - John F. Kennedy
Proud owner of an 88 Montero (with a blown engine).
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Re: Oil Pressure Gauge not working
[Re: dcg9381]
#734611
08/14/06 09:25 PM
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Joined: Aug 2001
Posts: 2,941
J Roll Me Over
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The FSM indicates that a bulb grounded through the sending unit with 12V should FLASH... Which doesn't make a lot of sense if it's resistance based. The test light should flash, because the sender does not continuously ground the circuit... It pulses the grounding at different rates, thus the faster the pulse, the higher the temp on the gauge coil. This results in a higher reading on the gauge. Shorting the circuit causes too high of a temp on the coil, and permanently bends the coil, causing the needle to show very low pressure at max, and nothing below that.
"A young man who does not have what it takes to perform military service is not likely to have what it takes to make a living." - John F. Kennedy
Proud owner of an 88 Montero (with a blown engine).
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Re: Oil Pressure Gauge not working
[Re: dcg9381]
#734612
08/21/06 03:27 PM
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Joined: Aug 2006
Posts: 5
Need a Spot
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I ran an aftermarket gauge by sunpro,25.00 came with new sender,I could not see spending 45. on a new sender,plus I think I get a more accurate reading wwith the aftermarket gauge.If you go that route make sure you do not get a mechanical gauge,those can be pita.
86 4runner,sas,35's,all pro d60 hybrid locked,rear spooled
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Re: Oil Pressure Gauge not working
[Re: ron86toy]
#734613
08/21/06 10:53 PM
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Joined: Oct 2000
Posts: 669
Rock Warrior
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Some of us like the factory gauges to function also.. :-O
22REturbo.net 1988 4Runner 22RTE core, turbocharged, megasquirted...
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