I had the problem of low oil pressure in my 05 Xterra, when I was idling the needle went lower than L and the oil light came on and when I accelerated the needle went up to the middle. The first fix was to change the oil sensor, the oil pump and the relief valve, even so the problem continued. The second fix was to change the oil gallery timing gasket and after that the needle only goes down a little before the letter L but the oil light no longer comes on.

Great video. Just what I was looking for. I have a 98 Pathfinder 3.3L with a similar oil pump. It was an elderly couple's for 20 years. I don't think they used it much. Low miles, 6,000 a year average, and likely wasn't driven hard ever. I think they let oil sit in it and maybe their mechanic put snake oil in it as a sales pitch. There was gummy honey-colored stuff on the refill cap. Something is causing this Pathfinder to knock at startup for 3-4 seconds and then between 1,800 and 3,300 RPM. If coasting between 1800 and 3300, it ceases. I think I caught rod bearing wear early and I replaced them. And checked the mains. Mains were good. Two rods had mild wear. No slack or slope in anything. Metal flakes stopped appearing. But still the knock between those RPM. It runs perfectly, otherwise. And the body and interior is like new. So it's a nice one I'd like to keep long-term. What do you think about this idea? If the oil isn't changed well can the valve system in the pump stick or malfunction and cause oil pressure to be insufficient? The pressure is 100% consistently poor at startup for 3 seconds and 1800 to 3300 rpm. I know there is also a pan gasket leak at the front and back. I thinned the oil as an experiment to see if pressure/noise changed and oil began quickly dripping from both ends of the oil pan when it was at warm idle. So I have to pull the pan anyways to fix those, so might as well pull inspect and replace the pump as well. Also have to check timing as well and swap all those parts. Do you know of a good oil pump replacement video of my motor or very similar? I found a timing kit one, but no oil pump.

My 05 frontier got run low on oil...while the oil pressure sensor was bad. Had a new one put in and the oil pressure at idle was 12psi (on a 60 degree day) the engine sounds fine. There was glitter in the oil so it isn't an issue with that plate. I've put 15w40 in it and got a obd2 reader with an app that let me bump the base idle up. Hopefully, that will be enough to let it hold at least 14psi in the summer heat.

Hello I have a 1997 Nissan Altima 2.4l automatic transmission the problem is the car has a surging/fluctuating idle Intermitently while driving also it stalls out while idling in park no codes can you help me fix or solve this problem any causes that could make this happen I replaced distributor and MAF sensor with a new one didn't work bought a salvage MAF sensor didn't work checked for vacuum leaks had 2 hoses cracked fixed those hoses still doing the same thing also checked fuses good cleaned egr no luck put a brand new crankshaft position sensor didn't fix it tested fuel pressure got 30-31 psi and when it is revved at high rpm it drops to 20psi also put a salvage low mileage throttle body didn't fix it took it to 2 mechanics couldn't solve the issue they told me there is a issue with the timing chain or the timing chain jumped the other mechanic took seafoam to clean the gunk off of the valves etc it ran good but didn't fix it same issues

Is this necessary to fix ?

Hi John Can you tell me what the Service Bulletin number is? I have a 06 frontier with the exact same issue and googling it hasn’t gotten me very far. Thanks

Was there a CEL as well?

Fram filters strikes again.