oil pressure / sending unit location?

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oil pressure / sending unit location?

Postby mclawdawg [OP] » December 24th 2009, 3:03am

92 safari passenger. Where is this thing?

I was getting good oil pressure, now It falls to the L and stalls. I starts every so often but the pressure drops again and dies. The van is sitting in a church parking lot.
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Re: oil pressure / sending unit location?

Postby mclawdawg [OP] » December 24th 2009, 7:40am

can someone tell me how to retrieve error codes on a 92 safari? Where to start? how to read the light flashes? A quick guide or point me to a thread.
ty
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Re: oil pressure / sending unit location?

Postby Mr_Bowtie » December 24th 2009, 4:18pm

All you need is a paper clip or a piece of electrical wire...here is a good reference:
http://www.gnttype.org/maint/malf.html

I believe the oil pressure gauge's sending unit is found on the very back of the motor right by the distributor. But, don't quote me on that one. It could be that your motor is just dying on you and not related to the oil pressure at all. :think:

What is it doing exactly?
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Re: oil pressure / sending unit location?

Postby mclawdawg [OP] » December 24th 2009, 4:30pm

Im leaning towards fuel filter/fuel pump problem but i cant be sure till i get an error code.

Basically it drives fine till it warms up and then dies. wait 10 -20min and drive 5min. repeat, repeat.
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Re: oil pressure / sending unit location?

Postby Tygre II » December 24th 2009, 11:36pm

I had a Toyota that did that to me. They had a small box under the dash that turned on the fuel pump when it got a Tachometer reading. It heated up and turned off.
I was only good for a 10 minute drive and it would quit. We replaced the fuel pump 5 times before I figured it out.
Lucky I could read wiring diagrams. I pulled the box apart and soldered a couple of spots together and the problem was solved. It then ran when the ignition was on.

I've been hearing that the Astros have something like that, but with the oil pressure.
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Re: oil pressure / sending unit location?

Postby mclawdawg [OP] » December 25th 2009, 5:44pm

darn thing wont give an error code either. hmmm..

I let it idle from cold till it warmed up yesterday and the oil pressure needle is pretty erratic; when it warms up it dies.
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Re: oil pressure / sending unit location?

Postby mclawdawg [OP] » December 26th 2009, 3:20am

Could someone post the location of the coolant temperature sensor please?
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Re: oil pressure / sending unit location?

Postby jeff's93astro » December 26th 2009, 3:30am

coolant temp sensor is in front of intake by thermostat housing on pass. side
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Re: oil pressure / sending unit location?

Postby mclawdawg [OP] » December 26th 2009, 4:49am

jeff's93astro wrote:coolant temp sensor is in front of intake by thermostat housing on pass. side


ty
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Re: little help please

Postby mclawdawg [OP] » December 27th 2009, 11:21pm

I have replaced the coolant temperature sensor. This was not the problem.

i will explain what is happening.
92 gmc safari 4.3

Engine cold; starts up like a charm. Sounds good, no strange noises. Let it idle for maybe 10 min and it just shuts off. No sputter, sputter, stop. It just turns off like i have turned the key to off. It cranks and occasionally fires up right after but will shut down immediately. Let the engine cool and repeat the same cycle. There are no error codes to report.
Besides the coolant temperature sensor; where do i go next? Ignition coil or module? Starter solenoid?

The oil pressure needle goes crazy at about 3/4 up the gauge. The temp gauge needle goes up maybe an eighth if that.
At about 7 min the oil needle drops to about 1/2 and around 10 min shuts down.

Any help would be appreciated.
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Re: oil pressure / sending unit location?

Postby JohnCalvin » May 6th 2017, 7:22pm

Did you ever find the problem? I have a similar issue.
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Re: oil pressure / sending unit location?

Postby AstroWill » May 6th 2017, 10:07pm

OP hasn't been back in over 7years, probably won't get a reply from him.

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Re: oil pressure / sending unit location?

Postby Big_kid » May 7th 2017, 12:04am

Check that the fuel system is vented somehow. Crack the gas cap, see if it starts up again. Also listen for it sucking air when you open the cap.

X2 on thinking the OP isn't coming back, it's been over 7 years since their last visit.
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