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2007 Ford F150 5.4l loses oil pressure when accelerating


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Jdarrah9621
Novice

Aug 15, 2017, 4:23 PM

Post #1 of 19 (355 views)
2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

Truck has a rough idle and when accelerating it loses oil pressure but then takes back off kind of cuts out and then kicks back in


Hammer Time
Ultimate Carjunky / Moderator
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Aug 15, 2017, 4:53 PM

Post #2 of 19 (328 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

You need to stop diving it and get to the bottom of the oil pressure problem ASAP. I t could be just a gauge problem but if it isn't, you're going to be buying a motor real soon if you run the engine.

You can either test the pressure with a mechanical gauge or just replace the sender to see if that is the problem.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jdarrah9621
Novice

Aug 15, 2017, 4:58 PM

Post #3 of 19 (322 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

I actually did a pressure test and it loses oil pressure I believe these motors had a cam issue has 170,000 miles on the truck do you know if that's the case or not the truck will run fine at a steady speed I also read a few blogs where people had a vacuum line leak on the backside of the motor


Hammer Time
Ultimate Carjunky / Moderator
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Aug 15, 2017, 5:01 PM

Post #4 of 19 (313 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

My guess would be that you have sludge floating around in the pan that is plugging up the pickup screen.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jdarrah9621
Novice

Aug 15, 2017, 5:03 PM

Post #5 of 19 (309 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

Thanks I will check that out.


Tom Greenleaf
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Aug 15, 2017, 10:49 PM

Post #6 of 19 (279 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

170K is 170K takes very regular on time oil changing with proper oils or you will get sludge to last that many miles at all IMO. Many people do, most don't. If you find it with sludge now as Hammer Time said it's clogging the pick up screen then rapid engine wear.


Heat IMO is the #1 cause of sludge along with lack of changing oil and engine's demise,


T



Discretesignals
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Aug 16, 2017, 4:48 AM

Post #7 of 19 (258 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

Check engine light on? if so, what trouble code numbers stored?

Have you connected a mechanical oil pressure gauge up to verify it is actually losing oil pressure? How many miles on the engine? Does it make any unusual noises? Any recent work done?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


Jdarrah9621
Novice

Aug 16, 2017, 4:04 PM

Post #8 of 19 (215 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

No there's no check engine lights on or nothing that's why I was pushing more towards a cam issue it seems to me that it's losing vacuum like when you stomp the accelerator down it almost completely cuts out and then takes off about two seconds later


Hammer Time
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Aug 16, 2017, 4:28 PM

Post #9 of 19 (207 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

you need to be concerned about finding the oil pressure problem before even looking for anything else. You can't run this truck in this condition.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jdarrah9621
Novice

Aug 16, 2017, 4:51 PM

Post #10 of 19 (203 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

Yeah I just bought the truck for a good price either going to replace the motor or fix the cams I know it's losing a little pressure because the guy told me they checked it when it was doing that and would drop on oil pressure


Hammer Time
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Aug 16, 2017, 5:05 PM

Post #11 of 19 (196 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

There is almost zero chance the cams are to blame for that oil pressure.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jdarrah9621
Novice

Aug 16, 2017, 5:10 PM

Post #12 of 19 (186 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

Thanks that is very good to know. One for my red said that there is a vacuum line that goes down the back side of the motor off of the intake he said he had the same issue and it ended up being that vacuum line you think that could be a possibility I will drop the oil pan and check for sludge I know the truck was serviced regularly as it was a service truck before I bought it


Hammer Time
Ultimate Carjunky / Moderator
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Aug 16, 2017, 5:12 PM

Post #13 of 19 (184 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

There is no way a vacuum line is causing an oil pressure problem either.

Besides you would have lean code with a sever vacuum leak.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jdarrah9621
Novice

Aug 16, 2017, 5:17 PM

Post #14 of 19 (180 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

What I was leaning to was the motor almost dies down enough to where it starts to drop oil pressure the actual gauge in the truck does not move at all I'm going by what the guy told me who I got it from. Like I said when I go to hit the gas at actually like it almost stalls out I think that's when it drops down so far it's barely even idling. Once it cuts out the valve start to rattle because it is almost about to stall and then it'll take off


Hammer Time
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Aug 16, 2017, 5:23 PM

Post #15 of 19 (166 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In


Quote
Truck has a rough idle and when accelerating it loses oil pressure but then takes back off kind of cuts out and then kicks back in


14 responses here and you are now telling me you think it's just a low RPM problem?



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jdarrah9621
Novice

Aug 16, 2017, 5:25 PM

Post #16 of 19 (162 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

No what I'm saying is it has a missing hesitation I'm saying that cutting out comes when you're actually accelerating and driving down the road not during idle at all I can rev the truck up and it doesn't do anything.
What I'm saying is when you do accelerate it going down the road and it starts to cut out that's when it starts to ride a little bit on the valves like it's almost about to stall and then all the sudden it will take off kind of seems like it's sucking air


Hammer Time
Ultimate Carjunky / Moderator
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Aug 16, 2017, 5:29 PM

Post #17 of 19 (154 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

You're coming up will all sorts nonsense scenarios here that have nothing to do with oil pressure.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jdarrah9621
Novice

Aug 16, 2017, 5:34 PM

Post #18 of 19 (150 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

I'm not sure what you mean by nonsense I'm just telling what the truck does I'm just telling you that that's what the guy told me it was losing oil pressure and he had checked. I'm not 100% sure it is actually losing oil pressure or not I'm just going by what the mechanic told that guy I do know that it almost stalls when you go to accelerate and then takes back off . I assumed it may be dropping or oil pressure when it almost stalls because the motor is about to shut off. It does have a rough hesitation at idle but like I said I can rev it up and it's fine it's just when you put it under a load or do an exterme acceleration.


Hammer Time
Ultimate Carjunky / Moderator
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Aug 16, 2017, 5:39 PM

Post #19 of 19 (148 views)
Re: 2007 Ford F150 5.4l loses oil pressure when accelerating Sign In

OK, before we chase our tails any further, lets have some numbers here.
I'm starting to wonder if we even have an oil pressure problem.
Just exactly how low is the pressure dropping according to the mechanical gauge? Don't post back until you have some documented specifics.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Aug 16, 2017, 5:58 PM)






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