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| Still have low oil pressure, after installing a high volume oil pump (Page 1/4) |
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Madess
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SEP 24, 05:15 PM
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I had low oil pressure on my 3.4 v6 so I installed one of the high volume pumps. I still have low pressure, but it is better. It is slightly above the red and occasionally will trip the oil pressure light. Any thoughts?
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tshark
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SEP 24, 05:48 PM
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... [This message has been edited by tshark (edited 09-08-2018).]
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Spoon
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SEP 24, 06:08 PM
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I'm in tsharks corner. Don't trust the dash gauge. Pickup or borrow a new automotive pressure gauge. They come with the goodies for attaching it to your engine. Then see what pressure your getting. Now in my humble opinion if your running a Fram oil filter, all bets are off. And your welcome to ask me how I know.
Spoon
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"Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne." - Kurt Vonnegut
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olejoedad
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SEP 24, 06:15 PM
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| quote | Originally posted by tshark:
You need to read the computer value to see if the gauge is correct. Have you replaced the oil pressure sending unit?
There used to be an oil system flush. You may try that to see if there is a blockage, but also to see if it takes an abnormally long time, as well as if it actually flows.
Is the low oil pressure a recent thing, or did this start with the swap? |
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Computer doesn't know the oil pressure, the sender/gage circuit has no interface to ECU.
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olejoedad
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SEP 24, 06:20 PM
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To the O/P.....
Are you using 2.8 pump and pickup?
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mcguiver3
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SEP 24, 07:11 PM
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A high volume pump does not translate to high pressure.
I would install a mechanical guage and check.
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Madess
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SEP 24, 10:17 PM
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I have checked with a mechanical gauge, and the reading is accurate. This is a new condition, the oil pressure has been getting worse, over the last few months. It is a 3.4 oil pump. [This message has been edited by Madess (edited 09-25-2017).]
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Gary W
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SEP 26, 09:03 AM
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Likely worn bearings. Main and/or rod. The clearances in the engine determine the oil pressure. The pump only supplies volume.
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La fiera
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SEP 26, 09:42 AM
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Put 20W-50 and if the pressure increases some then your bearings are shot
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1Packrat
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SEP 26, 09:46 AM
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Like you I had the same problem with my 2.8 when the mileage went over 100K and using 5w30 oil. It would produce the same symptoms you have. It would not maintain pressure at idle and would sometime cause the oil light to blink. On rare occasions it would turn off the fuel pump and the car would stall. My solution was to increase the oil viscosity I moved to using 10w40 and have never had the problem again and now the mileage is 160K. My wife tried to be nice one time she was using the car and stopped and had the oil changed for me. The shop used 5w30 which the car calls for. It took 1 can of STP for the oil light to stay off at idle.
To test your car you could try adding the STP and see if your problem goes away. If it does then on your next oil change increase the oil viscosity 1 grade.
If you ever get to having to use 20w50 start saving for motor work..
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