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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

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Old Mar 7, 2001 | 10:03 AM
  #1  
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oil pump

How do you change an oil pump on a F150, 89, automatic, 5.0L
without pulling the engine. can it be done in the driveway.
I have the will.


 
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Old Mar 7, 2001 | 12:39 PM
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oil pump

It can be removed without taking the engine out. But why do you wnat to replace it? IF it is low oil presure you may have worn bearings. Before you pull the pan post the symptons first, you may not need to remove the oil pan.

Dave

http://a2ztowing.homestead.com/a2ztowing.html
 
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Old Mar 7, 2001 | 01:10 PM
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oil pump

a repair shop said they measured low oil pressure when they were
checking out the oil sending unit while looking for the cause to:

oil gauge pegs way low after the engine is warmed up and just put into gear or coming to a stop sign while the engine idles down.

as the engine gets hotter it gets worse. even as i start to slow down in slow traffic the needle pegs low faster, engine light on, and the engine acts like it wants to die like its not shifting down fast enough. by the way it's an automatic.
The air idle solenoid and TPS seems to measure ok.
IN neutral or while the engine is cold (transmission cold ??)
there is no problem.

Its getting worse and thaught I would give the oil pump a try.

continious code 33 is in memory.

What is up?
 
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Old Mar 7, 2001 | 02:23 PM
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oil pump

code 33 means egr is blocked off or not working. Does it start
ticking when it runs rough. Sometimes when the oil pressure is
really low, it won't keep the valve lifters pumped up. It sounds
like you might have more than an oil pump problem but only you
know the history of the motor(I hope).
 
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Old Mar 7, 2001 | 02:51 PM
  #5  
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oil pump

First you need to find out what your oil presure really is. You can not rely on the factor guage as they are not trully a guage but a needle that works more off an on-off switch. I would first recommend installing an aftermarket guage and advise the real reading. If your oil presure was really that low, you would hear rod knock and lifter tapping.

Dave

http://a2ztowing.homestead.com/a2ztowing.html
 
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Old Mar 7, 2001 | 04:10 PM
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oil pump

There is no noticable nocking or ticking.
When it happens it's for a short duration because I
either put it in neutral at a stop or i'm not stoped long so the
low pressure and engine light goes away quickly. (not enough
time to let it nock or tick I beleive)
I do suspect multible problem. But beyond a weak oil pump, not sure which way to go. EGR, TPS, ? A combination of weak oil pump and idle control loop.
Can I check the oil pressure without taking it back to the repair
shop?
 
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Old Mar 7, 2001 | 04:20 PM
  #7  
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oil pump

Yeh,like I said before, install a guage that will give you accurate presure reading.

Dave

http://a2ztowing.homestead.com/a2ztowing.html
 
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Old Mar 7, 2001 | 04:23 PM
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oil pump

I will check the EGR tonite. Do you have the quick run down on this test before i dig through Chiltons?
Also, what voltage range should the idle air control solenoid see?
Can I unbolt it and view its operation with the engine running?
 
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Old Mar 8, 2001 | 08:27 AM
  #9  
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oil pump

I have the oil gauge but am having trouble locating
the oil sending unit. I beleive that is where it needs to be installed. Also, do I need to T it in so the signal from the
oil sending unit is not bypassed?
 
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Old Mar 8, 2001 | 10:20 AM
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oil pump

Most 302's have the sending unit on the drivers side front
of the engine. On mine it is hidden by the power steering pump.
I wouldn't go to the trouble of installing a tee, going through
the firewall and mounting the guage. This is just a test. Take
the original sending unit off and temporarily install the mechanical guage with the plastic line. Warm it up and and see
what you have. I have even run temporary guages out the hood
and taped them to the windshield for testing while driving.
 
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Old Mar 8, 2001 | 04:51 PM
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oil pump

 
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Old Dec 17, 2005 | 06:08 PM
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Talking What was wrong?

Did you ever find out what was wrong with your engine? I know it has been a while since this was posted, but I am hoping you are still out there.

Tim
 
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