![]() Thanks for the replies.no knocking noise, and i am planning on trying a mechanical gauge tomorrow(if i have time)my friend has a new one in the garage. Thats why I said that before but if it didn't knock your good to go. If it knocks for a couple seconds you can kiss your bearings goodbye because that means no oil on rings or bearings and that causes that knocking sound. I'm glad mine went because I got a 408 stroker engine. If you never heard a knock when it dropped to zero it may be the gauge but if I where in your postion with the miles and the 4.7's bad oil pumps I would price that pump and put one on. Its better safe than sorry and I would rather fix a part that didn't matter than one that did matter and miss it(I think I said that right).lol. This is what my 4.7 did at 140'000 miles. I'm not saying that cleaning it wouldn't work but with the time it takes to drop the pan and re-install it I would hate to go through that and it still does it. If that doesn't work when it warms up then drop that pan and put a new oil pump on it it shouldn't be to much and its way better than cleaning the pickup screen. If it was me I would do the mechanical guage test because they are way more acurate than the electrical guage IMO. I was thinking the pump was bad but not 100% sure that thats the problem and was looking for anyone who knows of this before i do try to remove the oil pan. Also i have a friend who has a 1997 with a 5.9 and he said his does this all the time(and he just drives it lol!!!!). there are now noises coming from the motor and i changed the oil and noticed no shavings. got home, started it it up, oil pressure was fine(at 40), drove it a few miles, fine, then as i slowed down to turn on my street the pressure started going down slowly, i watched it and when it got close to zero i pushed the gas and turned, it went back up while i was driving, then when i stopped it did the same thing. The first time i noticed it i heard a "ding" and the check gauge light was on, i saw the oil pressure gauge at zero and shut it off right away, checked the oil, then let it sit for about 9 hours while i went to work and back(in a diff vehicle). ![]() I know it sucks but no engine will handle 0psi for even a couple seconds. I personally would drain the oil, drop the pan, and see if you find metal shavings from the bearings. Goes to zero? Don't ever start that thing again and if it went to zero and it is the pump you prolly already eat up every bearing in that engine. Yea.was gonna try that out tomorrow and see could be the pick up is partially clogged. When in doubt, first check it with a mechanical gage. does this sound like the oil pump going bad? or maybe the sending unit? oil pressure is fine when im on the gas, it stays right near 40, only happens when i come to a stop. i checked my oil and its fine, then changed it and it still happens. slowly the gauge goes to zero and the light comes on to check gauges. I noticed me oil preesure starts to drop when i stop or stand at idle after warmed up.
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