I was reaseching an oil pres problem when I found your group.
I was a Ford tech at 2 different dealerships but this problem baffles
me.I have a 94 T-Bird with a 4.6 wit 120K on it.
Anytime the RPM's go ove 2750 the oil pressure drops the higher the r's
the lower the pressure. So low that it triggers the warning light
"check gagues". there is no knocking in the engine just low reading on
I found an old message about an oil leak at the filter base leaking oil
on the sender causing eratic readings,but I'm not sure that this would
fit this circumstance. Does anyone have an idea what could cause this?
Any help or ideas would be helpfull.
It sounds like you either have a clogged pickup screen or
the drainbacks from the heads are pluged reducing the oil
available to the pump. You should check the pressure with a
mechanical guage before doing a lot of work. If it is a
restricted.reduced oil supply, it won't make any difference
if you are driving or not as long as the engine speed is
there. If this is the problem, the pressure may hold a bit
Amen Lugnut, you beat me to it.
Restricted oil pickup most likely. I've seen this a (very) few times on poorly
maintained 4.6s. BTW, don't waste your time trying to clean it. A new pickup
less than $20. Pulling the pan is a real bear, don't take chances on the old
Didnt beat ME to it... I resisted the opportunity to once again rant
about the famous highly advertised oil, combined with extended times
between changes, combined with short engine use cycles.
Do a dipstick tube swab.
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
That covers pretty much all the Fords now for over 20 years.
It is possible on some of them to install a variable sender
to make the guage linear, but, hell, not many people
understand that some variation is normal. That is why I
think Ford just went to the all or nothing guage. It gives
the ignorant paranoid driver a bit of security by knowing
the engine has good oil pressure at all times - until it
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