It's a 2001 f-150 truck. After about 3 minutes ,it starts to read normal.
2007-01-16 04:01:21 · 8 answers · asked by bobo 1 in Cars & Transportation ➔ Maintenance & Repairs
i own a repair shop,and it may have a bad sending unit on it,,id have it checked,,there simple to replace,,and very cheap also,,but this is usually what causes this to happen,especially when their cold,good luck i hope this help,s.
2007-01-16 04:06:23 · answer #1 · answered by dodge man 7 · 2⤊ 0⤋
Are you saying that the oil light is red indicating low oil pressure ?but after some time the light goes out? Or do you have an oil pressure gauge that initially shows a low pressure but later comes up to normal? Most oil indicators have a pressure switch mounted somewhere on the engine (close to the block ) where it picks up the oil pressure from one of the oil passages. Generally in cold weather as you can understand the oil will tend to give a higher pressure than when warm and up to running temp. due to the viscosity of the oil which is effected by temperature. This pressure switch could be faulty.
2007-01-16 12:11:56 · answer #2 · answered by Steiner 6 · 0⤊ 0⤋
Oil is a superb and wonderful substance it lubricates all working parts, but when it's cold it will become thick and will not flow so easy. When you start your engine on a cold morning it takes a while to heat up the oil, it's a bit like mercury in your thermometer (quick silver) the hotter it gets the more fluid it becomes, it also expands with the heat and that is why it gives you an accurate reading, as it rises up the thermometer tube. With oil this fluidity is known as VISCOSITY the ease at which a liquid flows through a small hole in a certain amount of time, at a certain temperature.
2007-01-16 12:30:21 · answer #3 · answered by Why cant i read my daily Emails? 3 · 0⤊ 0⤋
First off, don't worry....
The oil port on the threaded end of the pressure sensor/switch is fairly small. If it has some old oil and crud at the end of it, it's hard for the cold oil to pressureize the internal components of the switch.
If it bothers you too much, you could unplug it, and unscrew from your engine and clean it out.
2007-01-16 12:10:06 · answer #4 · answered by Mr. KnowItAll 7 · 0⤊ 0⤋
Well either your oil pump is going out or just the sensor needs to replaced. Start with the cheap stuff. Buy a new oil pressure sensor and install it. It might just something small
2007-01-16 12:06:38 · answer #5 · answered by kakl1104 2 · 0⤊ 0⤋
If you have mud for oil, change it .10-30 or 5-20. If the oil is not a problem change the oil sender unit. Had one a while back and a small piece of crud was partially blocking the hole in the sender..If that doesn't solve the problem .......big trouble......Seldom does an oil pump go bad, very seldom.
2007-01-16 12:10:12 · answer #6 · answered by buzzwaltz 4 · 0⤊ 0⤋
i`m guessing your oil pressure sensor needs changing ??? had similar trouble ...
2007-01-16 12:06:42 · answer #7 · answered by Anonymous · 0⤊ 0⤋
oil too thick and gelled up...
What outside temperatures are you experiencing in the mornings?
2007-01-16 12:05:19 · answer #8 · answered by Anonymous · 0⤊ 0⤋