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curtmerci

ATTENTION anyone with oil pressure issues

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New GM owner and member here (99 sierra 1500, 5.3). I recently changed my oil and now my oil pressure is a bit higher than normal. Idles around 55 when warm, 60ish on cold start, merging on the high way I'm in the 70's. Before the oil change I'd idle around 35 warm and merging I would get around 60 if I was on it. Any ideas what would cause this? Changed with ac delco filter p46e and mobile 1 5w30 high mileage.

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I have replaced the screen and oil pressure switch 4 times. Has an idle oil pressure of 20 PSI. Yet, the check engine light keeps coming on and coding that the switch is fault. Any suggestions. 

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Drop the pan, check the screen, also, the pickup tube on engines have an oring where the tube is bolted In place.

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On 6/26/2019 at 6:02 PM, Jim1977 said:

Seems like most relavent place to ask this.

I have an 07 classic that the oil pressure gauge is always pegged at 80 psi until you floor it, then it goes to 0 and get a warning chime. Let off the gas, pressure goes back to 80 psi.  I replaced the stepper motor in the cluster and it had no effect.

I also have an 05 yukon denali that does the exact same thing , low oil pressure warning chimes all the time when driving. Oil sending unit on this one was changed about a year ago, but not the stepper.

 

Any ideas? Thanks

 

this happened to me, and as suggested I changed out the oil pressure sensor, (no filter on 2004 5.3) and problem went right away. Also noticed that I was using a bit of oil, there was a decent amount coming from the old sensor. Was an easy change, with the right socket.

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I had this issue and replaced the sensor and the filter on my 2013 LTZ.  All was well until this morning and I am getting the oil pressure issues again as I was driving to the dealership for an Airbag recall.  Should I pull the sensor and check it again?  It had only been on for a little over a month?  

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19 minutes ago, Dubckeeper said:

I had this issue and replaced the sensor and the filter on my 2013 LTZ.  All was well until this morning and I am getting the oil pressure issues again as I was driving to the dealership for an Airbag recall.  Should I pull the sensor and check it again?  It had only been on for a little over a month?  

Was the filter dirty, plugged?

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18 minutes ago, diyer2 said:

Was the filter dirty, plugged?

Yes, it was pretty dirty.  I had seen a few posts from CDARNAU about a fix he has ina video.  Going to look at that and see if it fixes it, but I am open to other suggestions at this point!  Love my truck, but this is getting ridiculous!

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I asked because it was dirty for a reason.  To long between oil changes for the type of oil you're using. 

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37 minutes ago, diyer2 said:

Was the filter dirty, plugged?

 

23 minutes ago, diyer2 said:

I asked because it was dirty for a reason.  To long between oil changes for the type of oil you're using. 

I am going to pull the filter and look again and change the oil along with it.  His video shows him blowing out the sensor socket with air so I will do that as well.

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If it's dirty, plugged again you have a sludge problem. 

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22 minutes ago, diyer2 said:

If it's dirty, plugged again you have a sludge problem. 

Best way to clean a sludge issue ?

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Many products available. I like Sea Foam. Walmart for best price. 

 

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I'll go ahead and ask here, but I think it's probably the oring.

 

I have an 06 6.0 vmax with 257k with a new jasper motor put in around 180k.

 

In the mornings I'll start it, it'll climb to 40 psi then slowly drop to 1-10 psi. Sometimes it'll set off the "oil pressure low" before I even move, but no knock. I'll jump in and start driving with the psi going up around 25-35 and anytime I come to a stop, the psi drops the "oil pressure low" will start going off. When I've been driving for maybe 5 mins or warms up a lil the oil will be sitting at 40-43 psi going 70 mph down the interstate and won't lose psi after it warms up. At idle it'll stay around 30-35 psi.

 

I've changed the sending unit behind the intake with a brand new one from the Chevy house and I've changed the oil. No oil has been burnt and still full on the dip stick along with no engine codes. Ive narrowed it down to the oring on the pick up tube being bad or maybe a crack on the tube itself. Anyone have this issue happen to them or somewhat similar?

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