This is topic oil pressure in forum Tech Talk at Northern California Ford Owners  .


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Posted by slick50 (Member # 7521) on :
 
i got a 91 mustang 5.0 thinking thats its got a bad oil pump when driving it normal the oil pressure stays at half ways but when you floor it the oil pressure drop down can it be a oil pump or what can it be anything will help thanks alot
 
Posted by Bronco Man (Member # 8401) on :
 
How many miles on car? what was it used for, commuter, drags? sounds like it might be plugged, as if its only low when there is a lack of exelerated pull from the pump. Do you know what I'm trying to say it's hard to describe. Have you tried changing the oil sending unit?
 
Posted by slick50 (Member # 7521) on :
 
its rebuilt motor i put about 100 miles or less in a week but ill try to chaange out the oil sending unit before i change the oil pump thanks for the help
 
Posted by kingmoochr (Member # 5834) on :
 
stock gauges are junk. get a real mechanical gauge on there asap, you could very well hurt something
 
Posted by jaejae (Member # 7958) on :
 
my oil pressure gauge is at the "l" but it hauls ass still so its prolly just the gauge..they are very inacurate
 
Posted by venomous99 (Member # 1917) on :
 
if you're relying on the stock gauge, its not telling u much. theyre basically idiot gauges that are on or off. as mentioned, your best bet is to throw on a aftermarket gauge & sender. u can tap off the fitting near the oil filter where the factory sender is. it could be the sender is bad on the factory gauge as well. if you plan on putting a gauge inside, i suggest u go w/ a electrical gauge vs a mechanical cuz the last thing you'd want is the nylon hose to fail, spilling hot oil into your interior or possibly you're face while driving.
 
Posted by kingmoochr (Member # 5834) on :
 
electrical is just a more expensive stock gauge. if you REALLY want to know your oil pressure, use a mechanical gauge with a steel braided line if you dont think your competent enough to route it where it wont get damaged.
 
Posted by venomous99 (Member # 1917) on :
 
quote:
Originally posted by kingmoochr:
electrical is just a more expensive stock gauge. if you REALLY want to know your oil pressure, use a mechanical gauge with a steel braided line if you dont think your competent enough to route it where it wont get damaged.
not really cuz it does show resolution like a mechanical gauge. the stock idiot one is either working or not. my current car has a mechanical gauge that is mounted on the cluster using the nylon line. ihave a copper line that is yet to be installed...steel braided i looked into and figure the copper is flexible enough and should last forever as long as its routed correctly.
 
Posted by Bronco Man (Member # 8401) on :
 
YOUR DISPLAY IS SLICK 50, I HOPE THAT MEANS SLICK 5.0. YOU CANT EVEN BUY THAT STUFF ANYMORE. HAVE YOU BEEN RUNNING IT IN YOU CAR? IF SO YOU COULD HAVE SOME PROBLEMS AS THAT STUFF FLAKES OFF AND PLUGS PORTS.
 
Posted by kingmoochr (Member # 5834) on :
 
the stock one isnt an idiot light. it just doesnt hav numbers and doesnt work well. you can still experience a problem with the sender on any electrical gauge and believe you have oil pressure when you may not. same wont happen with mechanical.
 
Posted by venomous99 (Member # 1917) on :
 
quote:
Originally posted by kingmoochr:
the stock one isnt an idiot light. it just doesnt hav numbers and doesnt work well. you can still experience a problem with the sender on any electrical gauge and believe you have oil pressure when you may not. same wont happen with mechanical.
the stock one is basically a digital qauge, meaning that its either low or high and no in between. even if they had numbers they wouldnt tell much since the resolution is basically 2 step. 0 or middle reading.

yes, no question about the mechanical being more accurate and less potential issues...u just gotta be careful w/ failed oil lines.
 
Posted by badazlx (Member # 4899) on :
 
did you find out what was wrong because my car does the same thing every once and a while.
 
Posted by Blind (Member # 3052) on :
 
quote:
Originally posted by badazlx:
did you find out what was wrong because my car does the same thing every once and a while.
if it does it off and on you're probably low on oil.
 
Posted by smashin 5.0 (Member # 8301) on :
 
hmm..try using thicker oil see what happens if anything it probably is your oil pump
 
Posted by slick50 (Member # 7521) on :
 
found out the problem change out the oil with thicker oil and half a qt more 10w40
 




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