LOW OIL PRESSURE?!?

[Grumpy Tooch]

I got in the truck this morning and warning dinged telling me low oil pressure! WTF? I havnt drove yet, but I have to leave now. Even if I rev the engine the pressure doesn't go over 35-38. Actually it drops a little when I rev it. Please tell me its not the oil pump...This truck has a mechanical one right? If it is, can it be changed without dropping the pan? Oil level is ok, btw. Please help

 

Just read might me the oil pressure sending unit?

[txab]

Test it with a mechanical gauge to be sure

[Grumpy Tooch]

how do you remove the dam plug on the sensor . I assume its the one on the side of the pan. cant get the dam thing off to remove the sensor

[Chris]

Oil pressure sensor is up top on the block behind the intake

 

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[Grumpy Tooch]

ya I found it, thank you....and my pressure kit doesn't have the correct fitting to thread in, so I have to just spend the $60 and change it

[Chris]

If it doesn't fix the issue ill take it off your hands

 

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[Grumpy Tooch]

what, the truck?

[Chris]

I know for sure my sensor died. If that isnt your issue ill take that sensor

 

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[Grumpy Tooch]

does your sensor read anything at all?, or is it just not accurate?

[Chris]

Whenever the key is on the gauge just goes up to 80. Turn the key off and goes to 0

 

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[Grumpy Tooch]

So, whats the pressure supposed to be at when truck is at idle?

[ujtruck]

+1 TXAB

 

find a Lathe machine shop, ask them to turn (cut) a adaptor for your mechanical gauge and test it, then go from there,

 

looking at this post, its look like your gauge or its electronic circuit is not functiong

[Grumpy Tooch]

thank you all for the posts. I replaced the oil pressure sensor and it seems it was just giving me a faulty reading. Took me 3 auto parts stores and 2 parts to get it right, but I got it in and pressure looks good.

 

And for all those post where people say they cut their arms up and hands and crap...did you ever hear of gloves and long sleeves...it was tough spot to get to and there are lot of things in the way but it was nothing.

 

Gonna do an early oil change for good measure.

[Grumpy Tooch]

Ok , so I'm opening this back up...

 

I was out for 15 hrs plowing and the oil pressure guage was fluctuating down to 0 then back up only when at idle. the warning would chime when it was down but if I waited a few sec it went back up to normal and waved around there a bit. Also, when I took off and gave it some throttle it was ok. This didnt happen every time I stopped but every so often when i was at idle. I never heard any engine knock, or felt anything wrong with the engine or truck, no performance issues at all. Mind you this is the brand new one I just put in before the cold came. I'm thinking it is the guage on the dash maybe.

[txab]

The gauge on the IP won't make the warning chimes sound. I'd look into other obvious items. Have you have checked PSI with a mechanical gauge?