I am having trouble with my '92 Turbo, it will only give me 6-lbs of boost.
I am using a manual boost controller and have the factory boost controller
completly out of the loop.
My question is this: how is the ECU controlling the boost if the factory
boost control solenoid is not connected to the wastegate? I thought perhaps
the BOV was leaking but I checked and it seems to be operating OK. I
believe the turbo is operating fine as the pressure will spike to 7 and drop
back to 6 and hold it as there long as I have my foot on the floor.
Any ideas? I had been running at 12 lbs for many months without any
problems whatsoever, air/fuel ratio gauge indicated good and rich at full
throttle........
PeteH
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Boost problem............
Moderators: Helpinators, Moderators
-
Dave C
Boost problem............
6-7PSI is what the wastegate spring will open at. Did you disconnect
all but the wiring from the factory solenoid?
It sounds like the MBC isn't working or might be installed
incorrectly. The only way for the ECU to control boost is via the
factory solenoid and the eventual fuel cut at ~13PSI.
--- In BC-BFLegacyWorks@y..., "PJHARJ" <pjharj@s...> wrote:
> I am having trouble with my '92 Turbo, it will only give me 6-lbs
of boost.
> I am using a manual boost controller and have the factory boost
controller
> completly out of the loop.
>
> My question is this: how is the ECU controlling the boost if the
factory
> boost control solenoid is not connected to the wastegate? I
thought perhaps
> the BOV was leaking but I checked and it seems to be operating OK.
I
> believe the turbo is operating fine as the pressure will spike to 7
and drop
> back to 6 and hold it as there long as I have my foot on the floor.
>
> Any ideas? I had been running at 12 lbs for many months without any
> problems whatsoever, air/fuel ratio gauge indicated good and rich
at full
> throttle........
>
> PeteH
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BC-BFLegacyWorks-unsubscribe@egroups.com
all but the wiring from the factory solenoid?
It sounds like the MBC isn't working or might be installed
incorrectly. The only way for the ECU to control boost is via the
factory solenoid and the eventual fuel cut at ~13PSI.
--- In BC-BFLegacyWorks@y..., "PJHARJ" <pjharj@s...> wrote:
> I am having trouble with my '92 Turbo, it will only give me 6-lbs
of boost.
> I am using a manual boost controller and have the factory boost
controller
> completly out of the loop.
>
> My question is this: how is the ECU controlling the boost if the
factory
> boost control solenoid is not connected to the wastegate? I
thought perhaps
> the BOV was leaking but I checked and it seems to be operating OK.
I
> believe the turbo is operating fine as the pressure will spike to 7
and drop
> back to 6 and hold it as there long as I have my foot on the floor.
>
> Any ideas? I had been running at 12 lbs for many months without any
> problems whatsoever, air/fuel ratio gauge indicated good and rich
at full
> throttle........
>
> PeteH
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-
PJHARJ
Boost problem............
> From: "Dave C" <legacycentral@yahoo.com>
>
>
>6-7PSI is what the wastegate spring will open at.
Do you mean if there is no signal at the wastegate diaphragm it will open at
6-7 PSI on it's own?
> Did you disconnect all but the wiring from the factory solenoid?
The only connection I have to the factory solenoid is at the very bottom,
the hose that runs to the air-box is still connected and yes, the wiring is
still connected to keep the CE light off.
>
>It sounds like the MBC isn't working or might be installed
>incorrectly.
I suppose it could have failed, but it such a simple device - check ball and
spring ( I pulled it apart and all is clean and free). Perhaps I lost some
spring tension? It has been installed on the car for over six months
without problems..........
How often does the wastegate solenoid fail I wonder? I will check it.
>The only way for the ECU to control boost is via the
>factory solenoid and the eventual fuel cut at ~13PSI.
Yep, that's what I thought.
Thanks for the help Dave!
PeteH
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>
>
>6-7PSI is what the wastegate spring will open at.
Do you mean if there is no signal at the wastegate diaphragm it will open at
6-7 PSI on it's own?
> Did you disconnect all but the wiring from the factory solenoid?
The only connection I have to the factory solenoid is at the very bottom,
the hose that runs to the air-box is still connected and yes, the wiring is
still connected to keep the CE light off.
>
>It sounds like the MBC isn't working or might be installed
>incorrectly.
I suppose it could have failed, but it such a simple device - check ball and
spring ( I pulled it apart and all is clean and free). Perhaps I lost some
spring tension? It has been installed on the car for over six months
without problems..........
How often does the wastegate solenoid fail I wonder? I will check it.
>The only way for the ECU to control boost is via the
>factory solenoid and the eventual fuel cut at ~13PSI.
Yep, that's what I thought.
Thanks for the help Dave!
PeteH
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-
Dave C
Boost problem............
When we were installing my AVC-R, we turned off all boost control to
see what the wastegate would open up at without boost control.
Somewhere between 6 and 7 PSI. This has held true on three EJ22ts i
know of. Ricky had a similar problem with his.
It would be hard for an MBC to fail, indeed. Try hooking the old
factory one up and see what happens. My factory one is just capped
off on all 3 fittings.
Dave
--- In BC-BFLegacyWorks@y..., "PJHARJ" <pjharj@s...> wrote:
> > From: "Dave C" <legacycentral@y...>
> >
> >
> >6-7PSI is what the wastegate spring will open at.
>
> Do you mean if there is no signal at the wastegate diaphragm it
will open at
> 6-7 PSI on it's own?
>
> > Did you disconnect all but the wiring from the factory solenoid?
>
> The only connection I have to the factory solenoid is at the very
bottom,
> the hose that runs to the air-box is still connected and yes, the
wiring is
> still connected to keep the CE light off.
>
> >
> >It sounds like the MBC isn't working or might be installed
> >incorrectly.
>
> I suppose it could have failed, but it such a simple device - check
ball and
> spring ( I pulled it apart and all is clean and free). Perhaps I
lost some
> spring tension? It has been installed on the car for over six
months
> without problems..........
> How often does the wastegate solenoid fail I wonder? I will check
it.
>
> >The only way for the ECU to control boost is via the
> >factory solenoid and the eventual fuel cut at ~13PSI.
>
> Yep, that's what I thought.
>
> Thanks for the help Dave!
>
> PeteH
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see what the wastegate would open up at without boost control.
Somewhere between 6 and 7 PSI. This has held true on three EJ22ts i
know of. Ricky had a similar problem with his.
It would be hard for an MBC to fail, indeed. Try hooking the old
factory one up and see what happens. My factory one is just capped
off on all 3 fittings.
Dave
--- In BC-BFLegacyWorks@y..., "PJHARJ" <pjharj@s...> wrote:
> > From: "Dave C" <legacycentral@y...>
> >
> >
> >6-7PSI is what the wastegate spring will open at.
>
> Do you mean if there is no signal at the wastegate diaphragm it
will open at
> 6-7 PSI on it's own?
>
> > Did you disconnect all but the wiring from the factory solenoid?
>
> The only connection I have to the factory solenoid is at the very
bottom,
> the hose that runs to the air-box is still connected and yes, the
wiring is
> still connected to keep the CE light off.
>
> >
> >It sounds like the MBC isn't working or might be installed
> >incorrectly.
>
> I suppose it could have failed, but it such a simple device - check
ball and
> spring ( I pulled it apart and all is clean and free). Perhaps I
lost some
> spring tension? It has been installed on the car for over six
months
> without problems..........
> How often does the wastegate solenoid fail I wonder? I will check
it.
>
> >The only way for the ECU to control boost is via the
> >factory solenoid and the eventual fuel cut at ~13PSI.
>
> Yep, that's what I thought.
>
> Thanks for the help Dave!
>
> PeteH
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-
Ricky
Boost problem............
Yup.. similar problem. but i totaled the car before i could find out
what the problem was... If it was running fine before, and u were
running the MBC, i think the factory boost solenoid failing would
have nothing to do with the boost settings, so i guess it must be
your MBC malfunctioning or some vaccum line must have came off... or
maybe there is a leak in the system somewhere.. good luck on finding
the problem..
i lived with the lost boost for a few weeeks and i got around 10%
better fuel economy..
--- In BC-BFLegacyWorks@y..., "Dave C" <legacycentral@y...> wrote:
> When we were installing my AVC-R, we turned off all boost control
to
> see what the wastegate would open up at without boost control.
> Somewhere between 6 and 7 PSI. This has held true on three EJ22ts
i
> know of. Ricky had a similar problem with his.
>
> It would be hard for an MBC to fail, indeed. Try hooking the old
> factory one up and see what happens. My factory one is just capped
> off on all 3 fittings.
>
> Dave
>
> --- In BC-BFLegacyWorks@y..., "PJHARJ" <pjharj@s...> wrote:
> > > From: "Dave C" <legacycentral@y...>
> > >
> > >
> > >6-7PSI is what the wastegate spring will open at.
> >
> > Do you mean if there is no signal at the wastegate diaphragm it
> will open at
> > 6-7 PSI on it's own?
> >
> > > Did you disconnect all but the wiring from the factory solenoid?
> >
> > The only connection I have to the factory solenoid is at the very
> bottom,
> > the hose that runs to the air-box is still connected and yes, the
> wiring is
> > still connected to keep the CE light off.
> >
> > >
> > >It sounds like the MBC isn't working or might be installed
> > >incorrectly.
> >
> > I suppose it could have failed, but it such a simple device -
check
> ball and
> > spring ( I pulled it apart and all is clean and free). Perhaps I
> lost some
> > spring tension? It has been installed on the car for over six
> months
> > without problems..........
> > How often does the wastegate solenoid fail I wonder? I will check
> it.
> >
> > >The only way for the ECU to control boost is via the
> > >factory solenoid and the eventual fuel cut at ~13PSI.
> >
> > Yep, that's what I thought.
> >
> > Thanks for the help Dave!
> >
> > PeteH
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what the problem was... If it was running fine before, and u were
running the MBC, i think the factory boost solenoid failing would
have nothing to do with the boost settings, so i guess it must be
your MBC malfunctioning or some vaccum line must have came off... or
maybe there is a leak in the system somewhere.. good luck on finding
the problem..
i lived with the lost boost for a few weeeks and i got around 10%
better fuel economy..
--- In BC-BFLegacyWorks@y..., "Dave C" <legacycentral@y...> wrote:
> When we were installing my AVC-R, we turned off all boost control
to
> see what the wastegate would open up at without boost control.
> Somewhere between 6 and 7 PSI. This has held true on three EJ22ts
i
> know of. Ricky had a similar problem with his.
>
> It would be hard for an MBC to fail, indeed. Try hooking the old
> factory one up and see what happens. My factory one is just capped
> off on all 3 fittings.
>
> Dave
>
> --- In BC-BFLegacyWorks@y..., "PJHARJ" <pjharj@s...> wrote:
> > > From: "Dave C" <legacycentral@y...>
> > >
> > >
> > >6-7PSI is what the wastegate spring will open at.
> >
> > Do you mean if there is no signal at the wastegate diaphragm it
> will open at
> > 6-7 PSI on it's own?
> >
> > > Did you disconnect all but the wiring from the factory solenoid?
> >
> > The only connection I have to the factory solenoid is at the very
> bottom,
> > the hose that runs to the air-box is still connected and yes, the
> wiring is
> > still connected to keep the CE light off.
> >
> > >
> > >It sounds like the MBC isn't working or might be installed
> > >incorrectly.
> >
> > I suppose it could have failed, but it such a simple device -
check
> ball and
> > spring ( I pulled it apart and all is clean and free). Perhaps I
> lost some
> > spring tension? It has been installed on the car for over six
> months
> > without problems..........
> > How often does the wastegate solenoid fail I wonder? I will check
> it.
> >
> > >The only way for the ECU to control boost is via the
> > >factory solenoid and the eventual fuel cut at ~13PSI.
> >
> > Yep, that's what I thought.
> >
> > Thanks for the help Dave!
> >
> > PeteH
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-
pjharj@sauk.com
Boost problem............
Conflabit! I got boost now! My problem was twofold, the first part
was me being an idiot - several months ago I had a CE light and
ignition/fuel cut when over 0 psi, I drove it this way for a while
until I figured out what the problem was. Now, two months later (and
50 degrees warmer) I found myself running 6-7 psi of boost so I tried
adjusting the MBC which today I found I was adjusting it the WRONG
way (the idiot part). BUT, unlike the the stock BCV which
compensates for the differant temps/barametric pressure, the MBC
compensates for NOTHING. As it gets colder out you must adjust the
MBC to compensate - when it gets warmer out, if the setting is not
changed (like what happened to me because of the solenoid failure)
you will be running at a lower boost setting and wondering why you
are only running 6psi, pretty boneheaded on my part! TO fix you
simply adjust manually.
I may try hooking up the MBC up a differant way and use it along with
the stock BCS for that very reason.
Thanks for the help!
PeteH
> When we were installing my AVC-R, we turned off all boost control
to
> see what the wastegate would open up at without boost control.
> Somewhere between 6 and 7 PSI. This has held true on three EJ22ts
i
> know of. Ricky had a similar problem with his.
>
> It would be hard for an MBC to fail, indeed. Try hooking the old
> factory one up and see what happens. My factory one is just capped
> off on all 3 fittings.
>
> Dave
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BC-BFLegacyWorks-unsubscribe@egroups.com
was me being an idiot - several months ago I had a CE light and
ignition/fuel cut when over 0 psi, I drove it this way for a while
until I figured out what the problem was. Now, two months later (and
50 degrees warmer) I found myself running 6-7 psi of boost so I tried
adjusting the MBC which today I found I was adjusting it the WRONG
way (the idiot part). BUT, unlike the the stock BCV which
compensates for the differant temps/barametric pressure, the MBC
compensates for NOTHING. As it gets colder out you must adjust the
MBC to compensate - when it gets warmer out, if the setting is not
changed (like what happened to me because of the solenoid failure)
you will be running at a lower boost setting and wondering why you
are only running 6psi, pretty boneheaded on my part! TO fix you
simply adjust manually.
I may try hooking up the MBC up a differant way and use it along with
the stock BCS for that very reason.
Thanks for the help!
PeteH
> When we were installing my AVC-R, we turned off all boost control
to
> see what the wastegate would open up at without boost control.
> Somewhere between 6 and 7 PSI. This has held true on three EJ22ts
i
> know of. Ricky had a similar problem with his.
>
> It would be hard for an MBC to fail, indeed. Try hooking the old
> factory one up and see what happens. My factory one is just capped
> off on all 3 fittings.
>
> Dave
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-
Jay Erlenbach
Boost problem............
I have this same type of problem on my US spec '92
Turbo also. Although I have yet to get any type of
boost controller... I will have good boost (factory
8.7) for a period of time... and then out of the blue
usually when I am driving it will drop to around 6 psi
for who knows how long (it has ranged from 2 hours to
two weeks). Since you don't use the boost solenoid I
am assuming that my problem is not the factory
solenoid either. Perhaps the wastegate is failing? My
knowledge of turbocharged cars ends at the theroy of
turbocharging. If anybody has any other ideas please
let me know. It's no fun driving at 6 psi.
Jay Erlenbach
'92 Legacy Turbo US Spec.
--- Ricky <prostho@netscape.net> wrote:
> Yup.. similar problem. but i totaled the car before
> i could find out
> what the problem was... If it was running fine
> before, and u were
> running the MBC, i think the factory boost solenoid
> failing would
> have nothing to do with the boost settings, so i
> guess it must be
> your MBC malfunctioning or some vaccum line must
> have came off... or
> maybe there is a leak in the system somewhere.. good
> luck on finding
> the problem..
>
> i lived with the lost boost for a few weeeks and i
> got around 10%
> better fuel economy..
>
> --- In BC-BFLegacyWorks@y..., "Dave C"
> <legacycentral@y...> wrote:
> > When we were installing my AVC-R, we turned off
> all boost control
> to
> > see what the wastegate would open up at without
> boost control.
> > Somewhere between 6 and 7 PSI. This has held true
> on three EJ22ts
> i
> > know of. Ricky had a similar problem with his.
> >
> > It would be hard for an MBC to fail, indeed. Try
> hooking the old
> > factory one up and see what happens. My factory
> one is just capped
> > off on all 3 fittings.
> >
> > Dave
> >
> > --- In BC-BFLegacyWorks@y..., "PJHARJ"
> <pjharj@s...> wrote:
> > > > From: "Dave C" <legacycentral@y...>
> > > >
> > > >
> > > >6-7PSI is what the wastegate spring will open
> at.
> > >
> > > Do you mean if there is no signal at the
> wastegate diaphragm it
> > will open at
> > > 6-7 PSI on it's own?
> > >
> > > > Did you disconnect all but the wiring from the
> factory solenoid?
> > >
> > > The only connection I have to the factory
> solenoid is at the very
> > bottom,
> > > the hose that runs to the air-box is still
> connected and yes, the
> > wiring is
> > > still connected to keep the CE light off.
> > >
> > > >
> > > >It sounds like the MBC isn't working or might
> be installed
> > > >incorrectly.
> > >
> > > I suppose it could have failed, but it such a
> simple device -
> check
> > ball and
> > > spring ( I pulled it apart and all is clean and
> free). Perhaps I
> > lost some
> > > spring tension? It has been installed on the
> car for over six
> > months
> > > without problems..........
> > > How often does the wastegate solenoid fail I
> wonder? I will check
> > it.
> > >
> > > >The only way for the ECU to control boost is
> via the
> > > >factory solenoid and the eventual fuel cut at
> ~13PSI.
> > >
> > > Yep, that's what I thought.
> > >
> > > Thanks for the help Dave!
> > >
> > > PeteH
>
>
__________________________________________________
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Turbo also. Although I have yet to get any type of
boost controller... I will have good boost (factory
8.7) for a period of time... and then out of the blue
usually when I am driving it will drop to around 6 psi
for who knows how long (it has ranged from 2 hours to
two weeks). Since you don't use the boost solenoid I
am assuming that my problem is not the factory
solenoid either. Perhaps the wastegate is failing? My
knowledge of turbocharged cars ends at the theroy of
turbocharging. If anybody has any other ideas please
let me know. It's no fun driving at 6 psi.
Jay Erlenbach
'92 Legacy Turbo US Spec.
--- Ricky <prostho@netscape.net> wrote:
> Yup.. similar problem. but i totaled the car before
> i could find out
> what the problem was... If it was running fine
> before, and u were
> running the MBC, i think the factory boost solenoid
> failing would
> have nothing to do with the boost settings, so i
> guess it must be
> your MBC malfunctioning or some vaccum line must
> have came off... or
> maybe there is a leak in the system somewhere.. good
> luck on finding
> the problem..
>
> i lived with the lost boost for a few weeeks and i
> got around 10%
> better fuel economy..
>
> --- In BC-BFLegacyWorks@y..., "Dave C"
> <legacycentral@y...> wrote:
> > When we were installing my AVC-R, we turned off
> all boost control
> to
> > see what the wastegate would open up at without
> boost control.
> > Somewhere between 6 and 7 PSI. This has held true
> on three EJ22ts
> i
> > know of. Ricky had a similar problem with his.
> >
> > It would be hard for an MBC to fail, indeed. Try
> hooking the old
> > factory one up and see what happens. My factory
> one is just capped
> > off on all 3 fittings.
> >
> > Dave
> >
> > --- In BC-BFLegacyWorks@y..., "PJHARJ"
> <pjharj@s...> wrote:
> > > > From: "Dave C" <legacycentral@y...>
> > > >
> > > >
> > > >6-7PSI is what the wastegate spring will open
> at.
> > >
> > > Do you mean if there is no signal at the
> wastegate diaphragm it
> > will open at
> > > 6-7 PSI on it's own?
> > >
> > > > Did you disconnect all but the wiring from the
> factory solenoid?
> > >
> > > The only connection I have to the factory
> solenoid is at the very
> > bottom,
> > > the hose that runs to the air-box is still
> connected and yes, the
> > wiring is
> > > still connected to keep the CE light off.
> > >
> > > >
> > > >It sounds like the MBC isn't working or might
> be installed
> > > >incorrectly.
> > >
> > > I suppose it could have failed, but it such a
> simple device -
> check
> > ball and
> > > spring ( I pulled it apart and all is clean and
> free). Perhaps I
> > lost some
> > > spring tension? It has been installed on the
> car for over six
> > months
> > > without problems..........
> > > How often does the wastegate solenoid fail I
> wonder? I will check
> > it.
> > >
> > > >The only way for the ECU to control boost is
> via the
> > > >factory solenoid and the eventual fuel cut at
> ~13PSI.
> > >
> > > Yep, that's what I thought.
> > >
> > > Thanks for the help Dave!
> > >
> > > PeteH
>
>
__________________________________________________
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FREDERICK_WHITMORE@hotmai
Boost problem............
I just installed my manual boost controller. But prior to this I
would occasionally lose boost to 6psi instead of 8.7 and the car was
totally stock!!! I installed a boost solenoid from another Legacy
and nothing changed. So unless both solenoids were bad this must not
be the problem. From what I see a few people are having this
problem. Has anyone figure this thing out yet?????? The problem has
fixed itself for now and hasn't reoccured since I put on the MBC but
I know it will.
Any help for me guys?
Fred (FREDDEX)
-- In BC-BFLegacyWorks@y..., pjharj@s... wrote:
> Conflabit! I got boost now! My problem was twofold, the first
part
> was me being an idiot - several months ago I had a CE light and
> ignition/fuel cut when over 0 psi, I drove it this way for a while
> until I figured out what the problem was. Now, two months later
(and
> 50 degrees warmer) I found myself running 6-7 psi of boost so I
tried
> adjusting the MBC which today I found I was adjusting it the WRONG
> way (the idiot part). BUT, unlike the the stock BCV which
> compensates for the differant temps/barametric pressure, the MBC
> compensates for NOTHING. As it gets colder out you must adjust the
> MBC to compensate - when it gets warmer out, if the setting is not
> changed (like what happened to me because of the solenoid failure)
> you will be running at a lower boost setting and wondering why you
> are only running 6psi, pretty boneheaded on my part! TO fix you
> simply adjust manually.
>
> I may try hooking up the MBC up a differant way and use it along
with
> the stock BCS for that very reason.
>
> Thanks for the help!
>
> PeteH
>
>
> > When we were installing my AVC-R, we turned off all boost control
> to
> > see what the wastegate would open up at without boost control.
> > Somewhere between 6 and 7 PSI. This has held true on three
EJ22ts
> i
> > know of. Ricky had a similar problem with his.
> >
> > It would be hard for an MBC to fail, indeed. Try hooking the old
> > factory one up and see what happens. My factory one is just
capped
> > off on all 3 fittings.
> >
> > Dave
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would occasionally lose boost to 6psi instead of 8.7 and the car was
totally stock!!! I installed a boost solenoid from another Legacy
and nothing changed. So unless both solenoids were bad this must not
be the problem. From what I see a few people are having this
problem. Has anyone figure this thing out yet?????? The problem has
fixed itself for now and hasn't reoccured since I put on the MBC but
I know it will.
Any help for me guys?
Fred (FREDDEX)
-- In BC-BFLegacyWorks@y..., pjharj@s... wrote:
> Conflabit! I got boost now! My problem was twofold, the first
part
> was me being an idiot - several months ago I had a CE light and
> ignition/fuel cut when over 0 psi, I drove it this way for a while
> until I figured out what the problem was. Now, two months later
(and
> 50 degrees warmer) I found myself running 6-7 psi of boost so I
tried
> adjusting the MBC which today I found I was adjusting it the WRONG
> way (the idiot part). BUT, unlike the the stock BCV which
> compensates for the differant temps/barametric pressure, the MBC
> compensates for NOTHING. As it gets colder out you must adjust the
> MBC to compensate - when it gets warmer out, if the setting is not
> changed (like what happened to me because of the solenoid failure)
> you will be running at a lower boost setting and wondering why you
> are only running 6psi, pretty boneheaded on my part! TO fix you
> simply adjust manually.
>
> I may try hooking up the MBC up a differant way and use it along
with
> the stock BCS for that very reason.
>
> Thanks for the help!
>
> PeteH
>
>
> > When we were installing my AVC-R, we turned off all boost control
> to
> > see what the wastegate would open up at without boost control.
> > Somewhere between 6 and 7 PSI. This has held true on three
EJ22ts
> i
> > know of. Ricky had a similar problem with his.
> >
> > It would be hard for an MBC to fail, indeed. Try hooking the old
> > factory one up and see what happens. My factory one is just
capped
> > off on all 3 fittings.
> >
> > Dave
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