Ecoboost vacuum hose falling off in hot weather
07-21-2011, 03:56 PM
#1
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Thread Starter
Ecoboost vacuum hose falling off in hot weather
I found this vacuum hose that keeps falling off the air intake any time the weather gets hot - I stuck it back on a few times, then finally took it to the dealer who put a hose clamp on it. Checked my cousin's F-150 ecoboost, same problem. The dealer said they hadn't seen it before, and that their Ford contact said it wasn't a known issue - looks like a hose clamp fixes it, in any case.
Here's a picture - the vacuum line that keeps coming off is in the dead center of the picture.
Here's a picture - the vacuum line that keeps coming off is in the dead center of the picture.
07-21-2011, 04:22 PM
#2
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RE: vacuum
Did you have a check engine light come on? I'm gonna check my hose later today. This hose being disconnected would cause a loss of power and decreased fuel efficiency, right? Overheating?
07-21-2011, 04:34 PM
#4
Senior Member
Thread Starter
It appears to go through a 1 way valve. My theory is that this hose is how the engine generates vacuum under boost - if the turbos are spooled up, there should be some serious vacuum in the air intake behind the air cleaner.
No lights came on, and I have no idea how long it was off. I did notice slightly more power and a much quieter engine after the hose was re-attached properly. I think the power loss was imaginary, but the engine was certainly much louder.
The biggest issue I can see with it you're letting unfiltered air into the turbochargers - there's a 1 way valve to keep the engine from losing vacuum pressure, and an electric vacuum pump behind the left headlamp to make up the difference in cases like this. If there's a total loss of vacuum pressure, it will lose control of the turbocharger wastegate, but it will still have power brakes by switching to electric assist instead of vacuum assit by using the ABS motor.
No lights came on, and I have no idea how long it was off. I did notice slightly more power and a much quieter engine after the hose was re-attached properly. I think the power loss was imaginary, but the engine was certainly much louder.
The biggest issue I can see with it you're letting unfiltered air into the turbochargers - there's a 1 way valve to keep the engine from losing vacuum pressure, and an electric vacuum pump behind the left headlamp to make up the difference in cases like this. If there's a total loss of vacuum pressure, it will lose control of the turbocharger wastegate, but it will still have power brakes by switching to electric assist instead of vacuum assit by using the ABS motor.
Last edited by p38fln; 07-21-2011 at 04:38 PM.
07-23-2011, 10:40 PM
#7
Senior Member
Put a hose clamp on mine today as it was on but the fit was not tight. Seems to have taken out the turbo flutter that I would sometimes notice. Only drove a bit, so can't say 100%, but initial impression is that it may have?
