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Old 01-01-2009, 14:57   #1 (permalink)
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Oil pressure problem

I have a 1996 Ford T-bird 4.6V8.Whenever I punch it at speeds over 40mph my oil pressure drops dramatically.Check gauges light comes on.As soon as i let off of the gas pedal the oil pressure stabilizes.This just started within the last three weeks.Any suggestions on where to check what the problem is?
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Old 01-01-2009, 17:40   #2 (permalink)
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Re: Please help!

I would start by checking the obvious- fluid level.
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Old 01-01-2009, 20:51   #3 (permalink)
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Thumbs up Re: Please help!

All fluid levels are normal.i take very good care of this vehicle.Oil changes,Trans fluid change.every routine maintenance imaginable.The car has 168XXX miles it. The engine and transmission were replaced @ 100XXX miles with Jasper products.I bought the car with 125XXX miles.I use Lucus oil stabilizer as an added protection.Always have.The oil pressure switch checked out fine.There are no codes that popped up.Nothing recently has been changed on this car except the radiator back in September.And that was cause a small plastic piece for the overflow broke that couldnt be fixed.
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Old 01-01-2009, 22:49   #4 (permalink)
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Re: Please help!

Ide check PCV valvue make sure it isnt clogged. Also make sure the vacume hoses are good.
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Old 01-12-2009, 20:56   #5 (permalink)
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Re: Please help!

I am at a lost for what thkis could be.I guess everyone else is also.
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Old 01-12-2009, 21:07   #6 (permalink)
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Re: Please help!

Wonder if the oil pump is getting weak
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Old 01-12-2009, 21:49   #7 (permalink)
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Re: Please help!

I was thinking that,but wasnt sure.how hard is it to replace the oil pump. thanks
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Old 01-13-2009, 12:00   #8 (permalink)
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Re: Please help!

Put a mechanical gauge on it is the first thing you do. You will be playing guessing games forever untill you do. How do you know the electric dash gauge is any good ? It could power down on high throttle. I've seen the oil pump drive shaft strip out after the cam sensor and or distributer seizes. On hard throttle pressure the shaft slips and good by oil pressure. Put a gauge on it.
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Old 01-13-2009, 13:24   #9 (permalink)
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Re: Please help!

It has to be a bad oil pump. To replace this the oil pan will have to be removed. Probably best done by a mechanic.
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Old 01-13-2009, 17:40   #10 (permalink)
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Re: Please help!

Bad oil pumps don't do that. They increase pressure at high throttle. So do bad bearings.
A broken pressure relief valve spring will also do this. i haven't seen a worn out oil pump
since 1976. That is almost a not happen any more. Put a gauge on it.
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