Oil preesure sensor problem
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Elder User
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From: Up Up Upstate, NY
Oil preesure sensor problem
My oil pressure has been on the R of normal for the last 10, 000 miles since I got the truck. I was going to the junk yard and it dropped to the left of the N and the oil level was good. I bought a new sensor(screws into the block) and put it in, now when I turn the truck on it goes to the R and when I start it it goes back to where it would go if I unplugged it when it was running. Anyone know whats up? Thanks, Rich O- its my F250 by the way
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By the way, unless you have an Oil SENDING UNIT, rather than a smaller SWITCH, you aren't getting Oil pressure, you have moving idiot light instead of a gauge. If this is the case there's a fix for it but it's not for the feint of heart.
If it is a switch, then new switches could have different voltages and such being as most are probably cheap, otherwise the Same is true, different oil sending units most likely have different tolerances as well and will send different to the gauge, past that, if you Want to be sure that at All times that the pressure is correct, and nothing electrical is failing, then I'd say put in a mechanical oil pressure gauge.
If it is a switch, then new switches could have different voltages and such being as most are probably cheap, otherwise the Same is true, different oil sending units most likely have different tolerances as well and will send different to the gauge, past that, if you Want to be sure that at All times that the pressure is correct, and nothing electrical is failing, then I'd say put in a mechanical oil pressure gauge.
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Elder User
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From: Up Up Upstate, NY
I dont know if thats the problem or not but I replaced the thing that threads into the block next to the oil filter and one wire slides onto it.
danr, grounding it to the block?
danr, grounding it to the block?
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Lead Driver
Joined: Aug 2006
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From: Sand Lake, MI
Note what if anything the gauge reads, should sweep across and hit the limit pin, near the high end of the normal zone. (You can't see the limit pin, not without taking the gauge apart)
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Lead Driver
Joined: Aug 2006
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From: Sand Lake, MI
Well it will show the gauge is not the problem, and or in part the problem. That is if the gauge pegs to high with the wire grounded out.
Lead Driver
Joined: Aug 2006
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From: Sand Lake, MI
Keep in mind you can install a "tee" in the block first then connect both units so you can retain function of the stock gauge at the same time if you wish. I would even if its reading was iffy at best, beat having a disconnected completely dead gauge I couldn't get rid of staring me in the face everyday!
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Elder User
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From: Up Up Upstate, NY
Haha ya I know what you mean, my check engine light drives me nuts. So if my gauge is good what do you think is wrong? Sorry about all the questions, im 17 and still learnin
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Ok, I did a little digging from when I did mine, and here's a post from Subford that got me rolling with a real oil gauge.
If you have one that looks like that switch in the first picture, then you can go ahead, if you do have a oil sending unit then you should be fine. Aside from that it's a quick and easy mod that works.
Hope this helped some.
Originally Posted by subford
The gauge in an older F-series pickup is the same as the gauge you have now.
All Ford did was put an resister in series with the wire coming from the engine and replace the oil sender with an oil switch.
To convert yours back just jumper the resister and replace the oil switch with an older type oil sender. The older type oil sender will have to be screwed into the end of the oil tube like the one the older Fords used.
Your oil switch:
http://i54.photobucket.com/albums/g91/s ... Switch.jpg
The older oil type sender:
http://i54.photobucket.com/albums/g91/s ... d/PS60.jpg
The resister:
http://i54.photobucket.com/albums/g91/s ... Jumper.jpg
The oil tube with the older type sender screwed into it:
http://i54.photobucket.com/albums/g91/s ... rSmall.jpg
/
All Ford did was put an resister in series with the wire coming from the engine and replace the oil sender with an oil switch.
To convert yours back just jumper the resister and replace the oil switch with an older type oil sender. The older type oil sender will have to be screwed into the end of the oil tube like the one the older Fords used.
Your oil switch:
http://i54.photobucket.com/albums/g91/s ... Switch.jpg
The older oil type sender:
http://i54.photobucket.com/albums/g91/s ... d/PS60.jpg
The resister:
http://i54.photobucket.com/albums/g91/s ... Jumper.jpg
The oil tube with the older type sender screwed into it:
http://i54.photobucket.com/albums/g91/s ... rSmall.jpg
/
If you have one that looks like that switch in the first picture, then you can go ahead, if you do have a oil sending unit then you should be fine. Aside from that it's a quick and easy mod that works.
Hope this helped some.