A friend of mine took his 2000 Dodge Dakota ( automatic transmission ) to a garage to have it repaired because the oil pressure kept dropping, They changed the oil pump and cleaned out the tube connected to the oil pump. Oil pressure was fine while idling in the garage, but when they took it out for a test drive the oil pressure dropped again. So they took the truck to the local Dodge dealership to have them connect it to the computer to see what was wrong with it. Nothing at all showed up on the computer. So the garage still doesn't know what the problem is. Does anyone have any idea what's causing the oil pressure to drop?|||The oil pressure needs to checked with a manual gauge. If it ok, replace the sender. If it is actually low, he has done damage to the bearings. This is most likely the case if the oil pressure is ok at idle but drops when driven. If they had to clean the oil pump pick up, that means that it was sludge starving the engine of oil while he was driving it. This wears the crank shaft bearings and opens up their clearance. With worn bearings the new oil pump may not be able to keep up. It could also have enough sludge in the oil return passages to slow down the drain back. The higher the rpm more oil is circulated and when sludge builds up it returns back to the pan slower. This can cause the oil pump to suck air and the pressure to drop out. The original shop should have started by checking the pressure with a manual gauge . When they replaced the oil pump they also should have removed some rod caps and main caps to check the bearing wear and crank shaft condition.|||someone needs to try changing the oil pressure sending unit on it ,that's the switch that sends the signal to the gage to work,if it goes bad it will cause it to read low but not actually be low,and it could have a bad gage in it also,these things need to be checked also,it may just be a bad sending unit on it they will make one show a low oil pressure but not really have it,good luck with finding it.try a sending unit before you spend any more money on it.|||I don't know but when you figure it out let me know because I have had the same problem for the last 2 years and they can't figure it out either. I also had a new oil pump and stuff put on. Some people tell me to have a new oil sending unit installed but i haven't done it yet and haven't had any issues other than the gauge show the pressure drop. Check the oil regular.|||Face it, They're Dodges!
Does it rise when you rev the engine? If yes then it is o.k.!|||I have a 1991 Dakota and the oil pressure always registers as being low but the idiot light does not come on so I was told not to worry. It is also very cool running and never gets hot. I have never had to replace a hose and I have had the truck since new. If the dealership finds nothing wrong then don't worry about the low oil. Are you going by the oil pressure gauge? If so they are NOT accurate.|||could be a bad cluster guage/ or weak oil pump/ or crank issues/ does it burn alot of oil? // good luck|||Yea, that's a good one? if its not leaking out any where? than have you looked in your engine coolant overflow tank or radiator to see if maybe your oil is leaking in there, due to a warn Head gasket or even cracked head?|||yes..the sending unit for the gage and stuff...lol
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