No oil pressure, no power, and cuts off.

[RowdyRauder]

My 04' MM. Died on me yesterday. It has felt sluggish on wot for awhile. While passing a car yesterday it down shifted fine . RPMs were rising but, she wasn't moving much. Engine noise rattle. No warning lights. Noticed the oil pressure gauge at zero. Car quickly lost power and shut off. It was low 1.5 quarts. Added oil. No dice. Towed home. Hours later it starts. Oil pressure is normal then soon falls. Give it gas, no power , oil pressure drops again, bogs and dies. I love this car. Bought it used about 5 years ago. It only has 167,000 miles on it . Read through some of the oil pressure threads but, only found one with a similar story. But, don't know how it was resolved.:alone:

[Gryphonzus]

I think I remember reading that our oil pumps have weak gears. Might need a new one. Sorry no other ideas.

[mm svt]

Drain it and try 5w40, why was it low on oil? Leak or burning it? What did your engine temp go to? There are others here that will have your answer but low, old, hot oil and you will have a very restrictive rotating assembly.

If you love it check the oil more often.

[fastblackmerc]

My thought is the oil pump +.

[RowdyRauder]

Temperature was good. The leak was at the oil sending. Switch . Front driver side . Can a bad oil pump cause this? Is it a safety feature to shut down like that? Thanks for your time guys.

[RF Overlord]

The oil pressure switch is only connected to the gauge...nothing else in the car knows what the actual pressure is.

Yours is a slightly unusual problem in that once the pump fails, it usually doesn't "recover" the way you've described. Fortunately, replacing the pump is relatively easy and doesn't require removal of the oil pan.

[Spectragod]

The oil pressure switch is only connected to the gauge...nothing else in the car knows what the actual pressure is.

Yours is a slightly unusual problem in that once the pump fails, it usually doesn't "recover" the way you've described. Fortunately, replacing the pump is relatively easy and doesn't require removal of the oil pan.

Really???????

But you do have to remove the timing chains, tensioners, guides, timing gear off the crank, all the accessories off the front, the timing cover, but you don't have to drop the pan.....

So it's easy, lol.

[RF Overlord]

That's why I said "relatively". If the oil pump is bad then it would probably be a good idea to at least do the tensioners and guides while it's apart and removing the oil pump at that point isn't a lot of extra work.

[justbob]

I bet your dealing with at least two different issues.

Bad gauge/ bad sending unit

And quite possibly a fuel pump or driver for stalling.


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[mm svt]

Bob such a great thought.

That's a best case scenario hope it's easier like a fuse to the fpdm

[DWSTANG67]

The oil pressure SWITCH is only connected to the gauge...nothing else in the car knows what the actual pressure is.

Yours is a slightly unusual problem in that once the pump fails, it usually doesn't "recover" the way you've described. Fortunately, replacing the pump is relatively easy and doesn't require removal of the oil pan.

Take noticed in this post that your oil pressure is a switch not a sensor when it has pressure it reads normal pressure when it has none like if your pump failed it will read zero at that point you are running with no oil pressure and no or little flow so your engine was about to seize. THE GAUGE AND SENSOR DOES NOT READ YOUR TRUE OIL PRESSURE, IT'S A SWITCH

[Zack]

The oil pan most definitely needs to be removed to change the oil pump.

[RF Overlord]

The oil pan most definitely needs to be removed to change the oil pump.I thought since the pump was mounted to the front of the block it would just slide off the crank snout.

I stand corrected.

[Zack]

I thought since the pump was mounted to the front of the block it would just slide off the crank snout.

I stand corrected.

The pickup tube bolts to it from the bottom.
It is 'possible' but it would be quite challenging

[mm svt]

The oil pan most definitely needs to be removed to change the oil pump.



Thank you, my thoughts exactly but didn't want to stick neck out but I remember having to remove the pickup tube stand to remove the pump on the cv

[Turbo4v06]

This reminds me of my 300k motor, it starts with good pressure but when it starts falling nothing brings it back up, didn't even respond to revs. Mechanical gauge swapped in, same issue. disassembled the motor, cleaned the heavy sludge out, replaced all timing components. good as new (well not new).

[Spectragod]

The pickup tube bolts to it from the bottom.

It is 'possible' but it would be quite challenging



Did mine without removing the pan, was a bit tricky, don't know if it saved any time.


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[RowdyRauder]

Driver error? Lol. Thanks for the douche input.
Anyway. Mechanic looked at an thinks the it's a combination of oil pump
And maybe bearing has gone. Looks like I will be posting it for sale or trade on a CRv .
Thanks for the helpful posters.

[RF Overlord]

Driver error? Lol. Thanks for the douche input. If you're referring to justbob's reply, I'm pretty sure he meant the fuel pump driver module, not the human driver.

[justbob]

If you're referring to justbob's reply, I'm pretty sure he meant the fuel pump driver module, not the human driver.



Correct. Some people take offense before actual comprehension takes place Bob. [emoji1303]

Then comes the snappy comebacks. Gee that hurt...




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[mm svt]

Driver error, lol, douche bag lol dang I needed a good laugh

[BUCKWHEAT]

Fxxking people driving marauders?

[Joe Walsh]

Driver Error almost always applies to Honda and Toyota lemmings.....errr......I meant owners.....

[Spectragod]

Driver error? Lol. Thanks for the douche input.
Anyway. Mechanic looked at an thinks the it's a combination of oil pump
And maybe bearing has gone. Looks like I will be posting it for sale or trade on a CRv .
Thanks for the helpful posters.

I read Bob's post and knew exactly what he meant, you take it as an insult?

Your mechanic......you should get a second opinion. Besides, you said you loved them car, so fix it, 3k at the most, still cheaper than a new car.

[Gerry24]

I read Bob's post and knew exactly what he meant, you take it as an insult?

Your mechanic......you should get a second opinion. Besides, you said you loved them car, so fix it, 3k at the most, still cheaper than a new car.

^^^:agree:^^^

[massacre]

If it were me I would put a mech gauge on it and test the actual pressure. Def sounds oil pump related, could be a couple things. Personally I would put a new oil pump in it for peace of mind, they are relatively cheap. Pickup tube could be loose or clogged also.

[liquid]

It almost sounds like a clogged fuel filter? Unfortunately I am just guessing.

My oil pump was not bad but I changed it to a Melling M227 this weekend during my timing chain project. FordTechMakuloco does it in a video for a 5.4L Expedition, that's what gave me the confidence to do it. I was terrified of dropping a bolt into the pan but patience prevailed and I avoided the hassle of dropping the pan.

Don't change the oil pump without getting a proper diagnosis. It is a full two days to change out, at least it was for someone who never did it before and was working on jackstands in a driveway.

[Turbo4v06]

forgot to mention I changed the pump and pickup which was partially clogged by timing plastic pieces.

[sailsmen]

I thought douche was in ref to "cleaned the heavy sludge out".:confused:

[FordNut]

I have the car now. It has a bad knock, probably spun a rod bearing.

[Granddaddy Marq]

I have the car now. It has a bad knock, probably spun a rod bearing.



You want your money back? Well if you don't want your money on that car, I've got a lot of parts. Call if you need something. I think you got an excellent buy.

[FordNut]

Sent you a parts inquiry PM

[FordNut]

Interesting trip hauling this thing home on a u-haul trailer. Everywhere I stopped (gas stations, rest areas, etc) people were checking it out, taking pictures, asking about it. You just don't get that reaction with most cars.

[justbob]

Interesting trip hauling this thing home on a u-haul trailer. Everywhere I stopped (gas stations, rest areas, etc) people were checking it out, taking pictures, asking about it. You just don't get that reaction with most cars.



I definitely concur.


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