LOW BOOST
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Freshman User
Joined: Oct 2006
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LOW BOOST
Howdy Folks,I have 04 6.0 with an Autometer Boost gauge.It has the crappy plastic hose which is tapped into,I believe a vacumm line on top of the passenger head,
What it is I have zero boost when cruising and maybe 5 at full throttle.This problem happenned within 15 min. and still continues.
I have lots of power and the turbo sound is normal,no smoke,no codes,new turbo last year
Could it be as simple as a hose break or the gauge fubared
or could it be leading to something more serious?
Any help or ideas would be most welcome
Thanks
What it is I have zero boost when cruising and maybe 5 at full throttle.This problem happenned within 15 min. and still continues.
I have lots of power and the turbo sound is normal,no smoke,no codes,new turbo last year
Could it be as simple as a hose break or the gauge fubared
or could it be leading to something more serious?
Any help or ideas would be most welcome
Thanks
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 243
From: Saratoga Springs,UT
6.0L NONE have Vacum like a Gasser FYI
Since it a Boosted Moter you have Positive Pressure (No-VAC)
There is a Vac Pump separate to create Vac for Heater control & Auto Hub for 4x4
Might be your Boost Gauge messing up since still has power/no smoke
Honestly you Boost Gauge is OK for referance but if there is a Problem you HAVE to see what the PCM is seeing
Since it a Boosted Moter you have Positive Pressure (No-VAC)
There is a Vac Pump separate to create Vac for Heater control & Auto Hub for 4x4
Might be your Boost Gauge messing up since still has power/no smoke
Honestly you Boost Gauge is OK for referance but if there is a Problem you HAVE to see what the PCM is seeing
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
I don't know why I did not think of this when I first
saw you post. f you have one of the little hand vacuum
pressure pumps that are used for break bleeding. You
could use the pressure port to test the boost gauge and line
with a helper to watch while you pump the thing. Most have
a dial to tell you what it's doing. Like this one
http://www.lincolnindustrial.com/Cat...its_Access.pdf
Sean
saw you post. f you have one of the little hand vacuum
pressure pumps that are used for break bleeding. You
could use the pressure port to test the boost gauge and line
with a helper to watch while you pump the thing. Most have
a dial to tell you what it's doing. Like this one
http://www.lincolnindustrial.com/Cat...its_Access.pdf
Sean
Senior User
Joined: Apr 2012
Posts: 294
Likes: 0
From: Orlando, FL
I had the intercooler boot pop off so lost the turbo... Trust me if you really had no boost you WILL NOTICE a significant loss of power. If you have access to guages the AE and Scan guage 2 both have electronic boost. Basically it looks at what the computer does. I would guess it is a problem with the guage. To translate what blade is saying the boost is a positive pressure. So not sure what "vaccuum line it is tapped into" The vaccuum pump and lines along the rear passenger firewall are for 4x4 hubs and for AC/heater controls. I would pop that guage off and see if air goes in or come out..... that will tell you if it vaccuum or boost you are seeing. Make sure it was installed correct and go from there. You may also want to blow out that plastic air line in case of obstruction. Good luck. Keep us informed 
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
It sounds like the boost gauge line is teed into the MAP sensor line. Check it for an obstruction or try tapping into a different place. Mine is tapped into the intake elbow and I've had zero problems with it for 6 years except for occassionally breaking the plastic line. For an alternative you can get copper tubing to replace the plastic but it's harder to work with and doesn't work any better IMHO.
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 243
From: Saratoga Springs,UT
I don't know why I did not think of this when I first
saw you post. f you have one of the little hand vacuum
pressure pumps that are used for break bleeding. You
could use the pressure port to test the boost gauge and line
with a helper to watch while you pump the thing. Most have
a dial to tell you what it's doing. Like this one
http://www.lincolnindustrial.com/Cat...its_Access.pdf
Sean
saw you post. f you have one of the little hand vacuum
pressure pumps that are used for break bleeding. You
could use the pressure port to test the boost gauge and line
with a helper to watch while you pump the thing. Most have
a dial to tell you what it's doing. Like this one
http://www.lincolnindustrial.com/Cat...its_Access.pdf
Sean
Our Intake system on these is just like a Air compressor positive pressure
NO Vacum on the 6.0L Engine
BOOSTED Moters dont have Vacum
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Freshman User
Joined: Oct 2006
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Thanks for the input folks
i got around to look at it today and when I checked the nylon air line to the gauge it fell apart in my hands,really brittle probably from heat and age
If anyone else has a setup like mine ,I would keep an eye on it
Thanks again
i got around to look at it today and when I checked the nylon air line to the gauge it fell apart in my hands,really brittle probably from heat and age
If anyone else has a setup like mine ,I would keep an eye on it
Thanks again
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Fleet Owner
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From: Spanaway
other port vacuum. It's just when you buy one they tend to sell
them as vacuum and forget the pressure part.
This tool is very handy for working on things that require
pressure or vacuum to operate and has to be near the top
of the list when breeding breaks and activation or pressure switches
Ane there is negative pressure (vacuum) in a boosted motor. The reason
that it is not used is that it is very low when it comes to doing things
like operating break boosters and AC doors and what not.
The 6.0L has engine operated vacuum device. It's the Filterminder
So that would put it between the filter and the intake of the turbo
on any boosted motor. Depending on filter and length of the feed
to the turbo it can be high or very low.
If I have time Sunday I'll put a manometer on and see
what I come up with. Yes I do know that is being picky.
Benny I understand where your coming from on that.
Sean
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 243
From: Saratoga Springs,UT
Oh I see
Man I have a Hand Vac Pump but not fancy one that does pressure to
I know about that Filter minder having vac
But I just didnt want him to confussed and think its like a Gasser
Its ALL GOOD
Man I have a Hand Vac Pump but not fancy one that does pressure to
I know about that Filter minder having vac
But I just didnt want him to confussed and think its like a Gasser
Its ALL GOOD
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Benny,
I reread my post from last night
I hope that I did not come of as an A$$
I do apologize for that and I am Sorry.
I thought they all had the pressure. Mine id from way back
early 90s I think.
Sean
I reread my post from last night
I hope that I did not come of as an A$$
I do apologize for that and I am Sorry.
I thought they all had the pressure. Mine id from way back
early 90s I think.
Sean
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 243
From: Saratoga Springs,UT
No Problem at all its all GOOD
No Need for ApoligyFact I learned something About them Hand Pumps I didnt think some did vac and pressure BOTH
A pressure one shure would be Handy
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
If you look at the link to the PDF you
can see the part numbers for each pump
I saw a part on Ebay that gives you a switch
to flip so you don't even have to move the hose
http://www.lincolnindustrial.com/Cat...its_Access.pdf
On Ebay
You can't see it but it has both ports
Mityvac Silverline Metal Vacuum Pump Tester Brake Bleeder Tool | eBay
$49.99 The MITYVAC PUMP Automotive systems tester (free shipping) | eBay
The converter thing I was talking about
Plastic Silverline
The metal version of the converter
Mityvac Silverline Pump Vacuum Pressure Kit Convertor | eBay
Sean
can see the part numbers for each pump
I saw a part on Ebay that gives you a switch
to flip so you don't even have to move the hose
http://www.lincolnindustrial.com/Cat...its_Access.pdf
On Ebay
You can't see it but it has both ports
Mityvac Silverline Metal Vacuum Pump Tester Brake Bleeder Tool | eBay
$49.99 The MITYVAC PUMP Automotive systems tester (free shipping) | eBay
The converter thing I was talking about
Plastic Silverline
The metal version of the converter
Mityvac Silverline Pump Vacuum Pressure Kit Convertor | eBay
Sean
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