i have a 2000 f150 4.2 5 speed with 105k on it and recently i have noticed that the oil pressure gauge seems to rocking back and forth as i am accelerating through the gears. total movement is maybe 1/8" to 3/16". i know on my last f150 the fuel gauge was always acting up but i didn't know if this was an indicator of catastrophic falure or just a crazy gauge that has a loose ground or something. the engine never ticks or anything like it is out of oil or acts out of the ordinary otherwise. Any thoughts???
If it does it when cold about the same as hot,I would suspect either the sending unit,or gage,if however it only does it after its at operating temp,you could have possibly a viscosity issue with the present oil,or a weak oil pump.
In either case unless the reading goes WAY South,Id say its ok.
You might try a different wieght oil.....
Is this the stock gauge, or an aftermarket gauge? Because the stock gauge is basically a dummy gauge that really doesn't do anything unless you have zero pressure. An aftermarket gauge should do this. When you are accelerating the pressure will go up a little bit.
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Michael
"If it has tits or wheels, It will give you trouble."
They are all stock gauges. it seems to be doing it when hot and cold. it's not normal fluctuation where it goes up when you are on the gas. It waves to me as I'm accelerating. As for the oil, it was just changed and came out of the same barrel as the last few oil changes so there should not be any issues there. I use valvoline 5-30 like i always have in the truck.
I guess the important thing is to determine if it is an ACTUAL fluctuation in oil pressure or just an INDICATED fluctuation in oil pressure.
reference the second post in this thread: http://www.ford-trucks.com/forums/21...ease-read.html
I believe the number displayed in "TEST" mode is a reflection of actual oil pressure before it gets converted to a go/no-go signal.
edit: it is not the ACTUAL oil pressure. By that I mean your actual oil pressure will not be the numbers displayed, but the numbers dispalyed will be an analog representation of the actual oil pressure.
yea, the numbers in the diagnostic mode are "000" which is not the case. if so, it would have been ticking and stopped a long time ago. i have an oil pressure gauge i could nab off the race car for a little while but i don't know where on these engines i could hook it up to. Is there a plug somewhere i could tap into?
I have no personal experience connecting an aftermarket oil pressure gauge.
I do know there is a procedure for converting our idiot gauge into a true functioning oil pressure gauge. I don't remember the details but I seem to remember it was not very complicated.
As far as 000 showing, that comes as a surprise to me. I am pretty sure I have used it to check and seen numbers indicated. I'll try and remember to check tomorrow.
hi, i have a machanical oil pressure guage that i fitted and i used a tee piece between the oil pressure sender and the pump. the guage is fastened on to the dash and the capilary copper pipe is fed thru a rubber grommet in the fire wall.
the job was straight forward and could have been made much easyer if i had take the drivers side wheel off to get to the oil pump/filter area.
for what its worth i think that your problem is the oil pressure sender. bokker.
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