2112
Texas
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Groover wrote: I don't believe that towing or running the engine heavily loaded has much effect other than the increased RPM increases the number of load cycles per mile. The 3.5EB delivers its max torque under 3000 rpm. You shouldn't ever need to run it above 3000 rpm.
Just letting my 6sp transmission do its thing in T/H mode, mine shifts at about 2600 rpm on flat land. The 5.0 V8 will be shifting over 4000 rpm to provide similar performance.
2011 Ford F-150 EcoBoost SuperCab Max Tow, 2084# Payload, 11,300# Tow,
Timbrens, PullRite SuperGlide 2700 15K
2013 KZ Durango 2857
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theoldwizard1
SE MI
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Groover wrote:
Oh yeah, the electric vacuum pump seems to be there in case you need to apply the brakes while the turbo charger has the intake manifold pressurized. So it connected to the manifold via the brake vacuum booster and debris can be sucked through. Apparently, failures of the electric pumps are not uncommon. The amount of damage that my daughter's truck suffered is. That is what the mechanic told us but based on some other issues that have come up I don't put a lot of stock in what that guy told us but the bottom line is that I still need a good engine.
Yes, vacuum can travel from the pump to the intake, but I can not understand the failure mode of the pump that could damage the engine ?
FYI, my 2022 F150 2.7L EcoBoost has electric power assist brakes and electric power assist steering.
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Groover
Pulaski, TN
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Joined: 10/17/2007
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theoldwizard1 wrote:Groover wrote:
Oh yeah, the electric vacuum pump seems to be there in case you need to apply the brakes while the turbo charger has the intake manifold pressurized. So it connected to the manifold via the brake vacuum booster and debris can be sucked through. Apparently, failures of the electric pumps are not uncommon. The amount of damage that my daughter's truck suffered is. That is what the mechanic told us but based on some other issues that have come up I don't put a lot of stock in what that guy told us but the bottom line is that I still need a good engine.
Yes, vacuum can travel from the pump to the intake, but I can not understand the failure mode of the pump that could damage the engine ?
FYI, my 2022 F150 2.7L EcoBoost has electric power assist brakes and electric power assist steering.
That is what the mechanic told us. I don't want to call him a liar but I have not been able to find this pump or even a vacuum hose going to the area where he said it was. Unfortunately, it is my daughter's truck and since she had picked out this shop and arranged the first repair she thought that it was appropriate for her to see it through. She is brilliant in several fields but mechanics isn't her strong point. It is possible that she misunderstood what the mechanic said. It is also possible that he just made up a story to justify billing her for a botched job.
I do know that both of my Ecoboost engines have vacuum boost for manual brake applications with electric braking for computer activated brake situations, like collision avoidance or ABS adjustments. I would bet that you still have a vacuum canister right behind the master brake cylinder.
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valhalla360
No paticular place.
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Joined: 08/19/2009
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ronharmless wrote:NamMedevac 70 wrote:bad luck for early adopters. never seemed practical to me. too much heat and stress for small engine. Not sure what the size of the cylinders has to do with its ability to handle stress and heat. Wouldn’t that primarily be the function of the block and cooling system? Seeing as it’s been around for at least 10 years and is still being sold - seems like it has a worthwhile track record.
Name the engine and I’ll point you to a post about someone that had a major problem with it; that doesn’t make it “impractical”.
Reality is somewhere in the middle.
A smaller block putting out the same HP, has more heat and stress per unit of mass/volume in the block but as you say, the engine has been around for 10yrs with no sign of it going away, so probably not a huge issue statistically.
I suspect a lot of it depends on how it gets used.
Vast majority of 1/2 ton trucks never tow anything or tow very rarely and not at max ratings. On a grocery run, you aren't asking much of the engine, so it never gets that much stress. Even if you stomp on it in a drag race, the extra load doesn't have enough time to overheat anything. Those engines are probably fine for 250k miles with just normal maintenance.
But for those relatively rare folks who do a lot of towing near/at max ratings, particularly mountain towing, it is a lot more stress. Particularly if the owner is the type to just put the hammer down and not pay attention to the gauges, I could see them easily over stressing the engine and shortening the engines life.
Tammy & Mike
Ford F250 V10
2021 Gray Wolf
Gemini Catamaran 34'
Full Time spliting time between boat and RV
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theoldwizard1
SE MI
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Groover wrote:That is what the mechanic told us. I don't want to call him a liar but I have not been able to find this pump or even a vacuum hose going to the area where he said it was.
Older EcoBoost engines DID have an auxiliary vacuum pump. Some were electric, some were mechanical.
Groover wrote:I do know that both of my Ecoboost engines have vacuum boost for manual brake applications with electric braking for computer activated brake situations, like collision avoidance or ABS adjustments. I would bet that you still have a vacuum canister right behind the master brake cylinder.
Mine are full electric. No vacuum chamber on the master cylinder. This is pretty new. Only out for a couple of years. The whole assembly is made by Bosch.
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theoldwizard1
SE MI
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NamMedevac 70 wrote:bad luck for early adopters. never seemed practical to me. too much heat and stress for small engine.
EcoBoost (turbo, direct injected gas engine) has been around for over 15 years. The technology is well proven !
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Groover
Pulaski, TN
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theoldwizard1 wrote:Groover wrote:That is what the mechanic told us. I don't want to call him a liar but I have not been able to find this pump or even a vacuum hose going to the area where he said it was.
Older EcoBoost engines DID have an auxiliary vacuum pump. Some were electric, some were mechanical.
Groover wrote:I do know that both of my Ecoboost engines have vacuum boost for manual brake applications with electric braking for computer activated brake situations, like collision avoidance or ABS adjustments. I would bet that you still have a vacuum canister right behind the master brake cylinder.
Mine are full electric. No vacuum chamber on the master cylinder. This is pretty new. Only out for a couple of years. The whole assembly is made by Bosch.
That is interesting. Thanks for the update.
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