oil stumped
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Freshman User
Joined: Apr 2010
Posts: 26
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From: omaha.Ne
oil stumped
i got a 92 f150 with the 5.8 in it i just put an oil pump in it and a oil sensor in it and i hold preusseure fine but when the motor gets warm i loose oil pressure when i come to a stop. when i get goin again i picks back up then go to stop or slow down. im stumped! any ideas? when i changed the oil pump the parts guy said i wouldnt need a new pick up screen would it be that?
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Joined: Oct 2009
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From: Highland, IL
That is how it works in almost any engine, when the oil warms up and you are at a low rpm your oil pressure is not going to be as high as when you are running at a higher rpm because the oil has to flow faster at higher rpms. And when your oil is cold it does not flow as well which would also cause your oil pressure to be higher too. How low and how high of oil pressures are you running? And what weight of oil are you using?
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Freshman User
Joined: Apr 2010
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From: omaha.Ne
im runn 10w 30 in it. when i come to a stop i loose all oil pressure and my truck just dies. when driving itll hold pressure at the m in normal only gauge it gots. but stop at stop sign or light it looses all and dies
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Freshman User
Joined: Apr 2010
Posts: 26
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From: omaha.Ne
yes normal gauge. but why is the truck dieng when i go stop? it runs fine til i go to stop then motor dies and restart it to leave every light? i hadda put it in nuetral keep rpms up at a light just so it dont die.
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Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
What makes you think the pump went out? no oil pressure, all lifters collapsed and clattering?
Even with no oil pressure, heck no oil in it, it would still start and run.
What trans?
Check it for trouble codes, even if the light isn't on?
Could be many things.
No vac lines knocked off?
Even with no oil pressure, heck no oil in it, it would still start and run.
What trans?
Check it for trouble codes, even if the light isn't on?
Could be many things.
No vac lines knocked off?
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Freshman User
Joined: Apr 2010
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From: omaha.Ne
when old oil pump went out motor shut off everything was good. i took off the oil filter it was empty no oil not even a drop so i changed the pump and sensor and there is no lifter clatter or nothing when motor is running it sounds great
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Still not getting the full story here, how did you know that pump was out. What drew you to that conclusion? what all did you replace with it?
Anything with the distributor?
There is nothing to tell the motor to shut down with a total loss of oil pressure, its just not that smart.
Unless yours has something my 5.8 doesn't, and the manual doesn't list it either?
Anything with the distributor?
There is nothing to tell the motor to shut down with a total loss of oil pressure, its just not that smart.
Unless yours has something my 5.8 doesn't, and the manual doesn't list it either?
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Freshman User
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From: omaha.Ne
i stopped at friends house house the motor just died. i went to start it back up there was no oil pressure so i towed it home pulled the oil filter it was dry so i replaced the oil pump was told to just clean pickup screen put new gasket on it a new oil pressure sensor and gave it a oil change used 10 w 30. truck started right up with oil pressure then i drove it for bout 20 min and all of a sudden i stopped at a light and lost oil pressure truck died. i waited a bit checked oil started up ran good til hadda stop again. towed it back devastated! my first ford i love the bodystyle! lol