legacycentral bbs

Hi Guys

I had my car overboosted for about 6 months now with no problems 12 psi, all of a sudden but quite rarley once a day (20min drive)it will suddenly drop all power when on max boost (as if it has run out of petrol) only for a split second but enough to make me nearly fly through the front windscreen....this is really begining to bug me as I do a lot of very close overtaking manouvers on blind corners so I need to be able to trust my car.

Any ideas ?

Cheero

Penty

92 UK 4cam Turbo Legacy Estate



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zZz <http://docs.yahoo.com/info/terms/> .

Penty, it sounds like you are hitting the boost cut.At 13 psi the fuel is cut by the ECU to prvent overboosting,and resulting detonation. Turn your boost down a slight bit. Good luck,BillC

----- Original Message -----
From: Penty <mailto:penty@nettaxi.com>
To: 'BC-BFLegacyWorks@yahoogroups.com <mailto:'BC-BFLegacyWorks@yahoogroups.com '> '
Sent: Friday, April 13, 2001 12:19 AM
Subject: [BC-BFLegacyWorks] Turbo munching to much petrol....maybe


Hi Guys

I had my car overboosted for about 6 months now with no problems 12 psi, all of a sudden but quite rarley once a day (20min drive)it will suddenly drop all power when on max boost (as if it has run out of petrol) only for a split second but enough to make me nearly fly through the front windscreen....this is really begining to bug me as I do a lot of very close overtaking manouvers on blind corners so I need to be able to trust my car.

Any ideas ?

Cheero

Penty

92 UK 4cam Turbo Legacy Estate



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zZz <http://docs.yahoo.com/info/terms/> .




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zZz <http://docs.yahoo.com/info/terms/> .

My 91 Legacy's engine is stock (no overboost) and I have the same
thing happening. When going at about 4000 rpm, I punch the
throtle .... then BANG !!! The engine momentarily cuts, like hitting
the brakes, then off I go. I can't turn the boost down because I
didn't turn it up in the first place .... puzzeling.




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It could be a number of things, but i don't think your UK engine has
the 13psi cutoff, though i'm not sure.

It does sound like a fuel or spark problem, however. Recently
changed the plugs? Recently used some heavy-duty injector cleaner?

It could also be a faulty throttle position sensor.

I hate these little tiny problems...my miss just won't go away, but i
think it's a malfunctioning injector.


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.......or get an fuel cut defender .
cheers , rod......

----- Original Message -----
From: Bill <mailto:boybill@mediaone.net> Covert
To: BC-BFLegacyWorks@yahoogroups.com
Sent: Friday, April 13, 2001 7:17 PM
Subject: Re: [BC-BFLegacyWorks] Turbo munching to much petrol....maybe

Penty, it sounds like you are hitting the boost cut.At 13 psi the fuel is cut by the ECU to prvent overboosting,and resulting detonation. Turn your boost down a slight bit. Good luck,BillC

----- Original Message -----
From: Penty <mailto:penty@nettaxi.com>
To: 'BC-BFLegacyWorks@yahoogroups.com <mailto:'BC-BFLegacyWorks@yahoogroups.com '> '
Sent: Friday, April 13, 2001 12:19 AM
Subject: [BC-BFLegacyWorks] Turbo munching to much petrol....maybe


Hi Guys

I had my car overboosted for about 6 months now with no problems 12 psi, all of a sudden but quite rarley once a day (20min drive)it will suddenly drop all power when on max boost (as if it has run out of petrol) only for a split second but enough to make me nearly fly through the front windscreen....this is really begining to bug me as I do a lot of very close overtaking manouvers on blind corners so I need to be able to trust my car.

Any ideas ?

Cheero

Penty

92 UK 4cam Turbo Legacy Estate



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zZz <http://docs.yahoo.com/info/terms/> .




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zZz <http://docs.yahoo.com/info/terms/> .




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zZz <http://docs.yahoo.com/info/terms/> .

do you have a boost gauge fitted so as to be able to see if it is
overboosting?
Rod
----- Original Message -----
From: "Roy Lima" <rflima@home.com>
To: <BC-BFLegacyWorks@yahoogroups.com>
Sent: Friday, April 13, 2001 11:13 PM
Subject: [BC-BFLegacyWorks] Re: Turbo munching to much petrol....maybe


> My 91 Legacy's engine is stock (no overboost) and I have the same
> thing happening. When going at about 4000 rpm, I punch the
> throtle .... then BANG !!! The engine momentarily cuts, like hitting
> the brakes, then off I go. I can't turn the boost down because I
> didn't turn it up in the first place .... puzzeling.
>
>
>
>
> To unsubscribe from this group, send an email to:
> BC-BFLegacyWorks-unsubscribe@egroups.com
>
>
>
>
>
>


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I wander what it is?

-----Original Message-----
From: Roy Lima [ mailto:rflima@home.com]
Sent: Friday, April 13, 2001 2:14 PM
To: BC-BFLegacyWorks@yahoogroups.com
Subject: [BC-BFLegacyWorks] Re: Turbo munching to much petrol....maybe


My 91 Legacy's engine is stock (no overboost) and I have the same
thing happening. When going at about 4000 rpm, I punch the
throtle .... then BANG !!! The engine momentarily cuts, like hitting
the brakes, then off I go. I can't turn the boost down because I
didn't turn it up in the first place .... puzzeling.




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zZz <http://docs.yahoo.com/info/terms/> .

the more I think about it I am sure it is not the boost cut as my gauge is a good one and is on the negative side of 12psi
-----Original Message-----
From: Rod [mailto:melrod@optusnet.com.au]
Sent: Friday, April 13, 2001 3:18 PM
To: BC-BFLegacyWorks@yahoogroups.com
Subject: Re: [BC-BFLegacyWorks] Turbo munching to much petrol....maybe


.......or get an fuel cut defender .
cheers , rod......

----- Original Message -----
From: Bill <mailto:boybill@mediaone.net> Covert
To: BC-BFLegacyWorks@yahoogroups.com
Sent: Friday, April 13, 2001 7:17 PM
Subject: Re: [BC-BFLegacyWorks] Turbo munching to much petrol....maybe

Penty, it sounds like you are hitting the boost cut.At 13 psi the fuel is cut by the ECU to prvent overboosting,and resulting detonation. Turn your boost down a slight bit. Good luck,BillC

----- Original Message -----
From: Penty <mailto:penty@nettaxi.com>
To: 'BC-BFLegacyWorks@yahoogroups.com <mailto:'BC-BFLegacyWorks@yahoogroups.com '> '
Sent: Friday, April 13, 2001 12:19 AM
Subject: [BC-BFLegacyWorks] Turbo munching to much petrol....maybe


Hi Guys

I had my car overboosted for about 6 months now with no problems 12 psi, all of a sudden but quite rarley once a day (20min drive)it will suddenly drop all power when on max boost (as if it has run out of petrol) only for a split second but enough to make me nearly fly through the front windscreen....this is really begining to bug me as I do a lot of very close overtaking manouvers on blind corners so I need to be able to trust my car.

Any ideas ?

Cheero

Penty

92 UK 4cam Turbo Legacy Estate



To unsubscribe from this group, send an email to:
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zZz <http://docs.yahoo.com/info/terms/> .




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zZz <http://docs.yahoo.com/info/terms/> .




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zZz <http://docs.yahoo.com/info/terms/> .



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zZz <http://docs.yahoo.com/info/terms/> .

yes I have won it is on the negative site of 12psi (11.5ish) so I don't think it's the boost cut

-----Original Message-----
From: Rod [ mailto:melrod@optusnet.com.au]
Sent: Friday, April 13, 2001 3:15 PM
To: BC-BFLegacyWorks@yahoogroups.com
Subject: Re: [BC-BFLegacyWorks] Re: Turbo munching to much
petrol....maybe


do you have a boost gauge fitted so as to be able to see if it is
overboosting?
Rod
----- Original Message -----
From: "Roy Lima" <rflima@home.com>
To: <BC-BFLegacyWorks@yahoogroups.com>
Sent: Friday, April 13, 2001 11:13 PM
Subject: [BC-BFLegacyWorks] Re: Turbo munching to much petrol....maybe


> My 91 Legacy's engine is stock (no overboost) and I have the same
> thing happening. When going at about 4000 rpm, I punch the
> throtle .... then BANG !!! The engine momentarily cuts, like hitting
> the brakes, then off I go. I can't turn the boost down because I
> didn't turn it up in the first place .... puzzeling.
>
>
>
>
> To unsubscribe from this group, send an email to:
> BC-BFLegacyWorks-unsubscribe@egroups.com
>
>
>
>
>
>


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zZz <http://docs.yahoo.com/info/terms/> .

no new spark plugs and no new oil I have done nothing to the car in 6 months but maybe that is the problem.........lack on maintenance?

-----Original Message-----
From: Dave C [ mailto:legacycentral@yahoo.com]
Sent: Friday, April 13, 2001 2:30 PM
To: BC-BFLegacyWorks@yahoogroups.com
Subject: [BC-BFLegacyWorks] Re: Turbo munching to much petrol....maybe


It could be a number of things, but i don't think your UK engine has
the 13psi cutoff, though i'm not sure.

It does sound like a fuel or spark problem, however. Recently
changed the plugs? Recently used some heavy-duty injector cleaner?

It could also be a faulty throttle position sensor.

I hate these little tiny problems...my miss just won't go away, but i
think it's a malfunctioning injector.


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zZz <http://docs.yahoo.com/info/terms/> .

Your car won't run right without proper maintenance.

Start with those and work your way around.

(oh, and please try to reply to the messages together if possible)

--- In BC-BFLegacyWorks@y..., Penty <penty@n...> wrote:
>


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I was thinking about a problem I had similar to this. It also affected my
gas milage. I found the oproblem to be fuel ignition failure, basicly my
spark plug wires were not doing there job anymore. I replaced them and the
problem went away. What I understand was happening was that under boost, the
spark was so weak that it would not ignite the fuel mixture. It did not seem
to do it except when the turbo was kicking in.
Maybe??
Mark
92 Turbo Rally car
www.rrunracing.com


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As everyone else has said.... you just found the ECU fuel cut caused by
overboost. It is hard to say why you just found it after 6 months of use...
probably because you were always on the edge, and perhaps due to higher
efficiency combustion due to intake charge density... are you running better
fuel or experiencing colder / denser atmoshere with the weird weather we all
seem to get... or just putting your boot in harder?

John Gillon
www.clubsub.org.nz

----- Original Message -----
From: Penty <penty@nettaxi.com>
To: <BC-BFLegacyWorks@yahoogroups.com>
Sent: Friday, April 13, 2001 4:19 PM
Subject: [BC-BFLegacyWorks] Turbo munching to much petrol....maybe


> Turbo munching to much petrol....maybeHi Guys
>
> I had my car overboosted for about 6 months now with no problems 12 psi,
all of a sudden but quite rarley once a day (20min drive)it will suddenly
drop all power when on max boost (as if it has run out of petrol) only for a
split second but enough to make me nearly fly through the front
windscreen....this is really begining to bug me as I do a lot of very close
overtaking manouvers on blind corners so I need to be able to trust my car.
>
> Any ideas ?
>
> Cheero
>
> Penty
>
> 92 UK 4cam Turbo Legacy Estate
>
>
>
>
>
>
> To unsubscribe from this group, send an email to:
> BC-BFLegacyWorks-unsubscribe@egroups.com
>
>
>
> zZz.
>
>


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