Some days I love this truck and some days I wud................
Anyways when I am towing my small camper about 2000 lbs loaded and
trying to do the long haul up hills with ac on driving semi nice a
little ruff I guess...the check engine light has been comming on and I
go thru a shit load of fuel like 300 km's per tank.
The van gets rated 20-21 mpg when I am not towing ( crappy but that is
what it is rated at) it is more like 8-10 when I am towing.
And lo and behold the code I get (44 Oxygen sensor voltage was under
0.25 volts for up to 4 1/2 minutes of closed loop operation.) is for the
one sensor I allready replaced. What would cause this reading? Could
timming or just crap gas give this reading? What is that reading? Rich
or lean? My guess is rich ie no or low oxeygen Carbon the cat con is now
by passed as it was burned out anyways like the guts were gone straight
pipe?

In article <44F3A5AD.FD31BDA2@shaw.ca>,
no one that you know <nooneshome@shaw.ca> wrote:

> Some days I love this truck and some days I wud................
> Anyways when I am towing my small camper about 2000 lbs loaded and
> trying to do the long haul up hills with ac on driving semi nice a
> little ruff I guess...the check engine light has been comming on and I
> go thru a shit load of fuel like 300 km's per tank.
> The van gets rated 20-21 mpg when I am not towing ( crappy but that is
> what it is rated at) it is more like 8-10 when I am towing.
> And lo and behold the code I get (44 Oxygen sensor voltage was under
> 0.25 volts for up to 4 1/2 minutes of closed loop operation.) is for the
> one sensor I allready replaced. What would cause this reading? Could
> timming or just crap gas give this reading? What is that reading? Rich
> or lean? My guess is rich ie no or low oxeygen Carbon the cat con is now
> by passed as it was burned out anyways like the guts were gone straight
> pipe?

Q) Why in the hell would we need to know the model year?

A) Because 4.3 liter engines in GMC Safari vans came as;
1) Carbureted
2) Throttle body fuel injection
3) Central Port Fuel Injected
4) Central Sequential Port Fuel Injected

no one that you know wrote:
> Some days I love this truck and some days I wud................
> Anyways when I am towing my small camper about 2000 lbs loaded and
> trying to do the long haul up hills with ac on driving semi nice a
> little ruff I guess...the check engine light has been comming on and I
> go thru a shit load of fuel like 300 km's per tank.
> The van gets rated 20-21 mpg when I am not towing ( crappy but that is
> what it is rated at) it is more like 8-10 when I am towing.
> And lo and behold the code I get (44 Oxygen sensor voltage was under
> 0.25 volts for up to 4 1/2 minutes of closed loop operation.) is for the
> one sensor I allready replaced. What would cause this reading? Could
> timming or just crap gas give this reading? What is that reading? Rich
> or lean? My guess is rich ie no or low oxeygen Carbon the cat con is now
> by passed as it was burned out anyways like the guts were gone straight
> pipe?

Could also be that the sensor wire has an intermittent/bad connection OR
is to close to something hot and the insulation is melted/damaged and
it shorted out for a bit.

--
Steve W.
Near Cooperstown, New York

Life is not like a box of chocolates
it's more like a jar of jalapenos-
what you do today could burn your ass tomorrow!

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
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----= East and West-Coast Server Farms - Total Privacy via Encryption =----

Oh ya oops 1994 w engine and yes the leaky cpi was replaced about 30 k
ago

aarcuda69062 wrote:
>
> In article <44F3A5AD.FD31BDA2@shaw.ca>,
> no one that you know <nooneshome@shaw.ca> wrote:
>
> > Some days I love this truck and some days I wud................
> > Anyways when I am towing my small camper about 2000 lbs loaded and
> > trying to do the long haul up hills with ac on driving semi nice a
> > little ruff I guess...the check engine light has been comming on and I
> > go thru a shit load of fuel like 300 km's per tank.
> > The van gets rated 20-21 mpg when I am not towing ( crappy but that is
> > what it is rated at) it is more like 8-10 when I am towing.
> > And lo and behold the code I get (44 Oxygen sensor voltage was under
> > 0.25 volts for up to 4 1/2 minutes of closed loop operation.) is for the
> > one sensor I allready replaced. What would cause this reading? Could
> > timming or just crap gas give this reading? What is that reading? Rich
> > or lean? My guess is rich ie no or low oxeygen Carbon the cat con is now
> > by passed as it was burned out anyways like the guts were gone straight
> > pipe?
>
> Q) Why in the hell would we need to know the model year?
>
> A) Because 4.3 liter engines in GMC Safari vans came as;
> 1) Carbureted
> 2) Throttle body fuel injection
> 3) Central Port Fuel Injected
> 4) Central Sequential Port Fuel Injected

would this lean code cause the puter to dump more fuel?

"Steve W." wrote:
>
> no one that you know wrote:
> > Some days I love this truck and some days I wud................
> > Anyways when I am towing my small camper about 2000 lbs loaded and
> > trying to do the long haul up hills with ac on driving semi nice a
> > little ruff I guess...the check engine light has been comming on and I
> > go thru a shit load of fuel like 300 km's per tank.
> > The van gets rated 20-21 mpg when I am not towing ( crappy but that is
> > what it is rated at) it is more like 8-10 when I am towing.
> > And lo and behold the code I get (44 Oxygen sensor voltage was under
> > 0.25 volts for up to 4 1/2 minutes of closed loop operation.) is for the
> > one sensor I allready replaced. What would cause this reading? Could
> > timming or just crap gas give this reading? What is that reading? Rich
> > or lean? My guess is rich ie no or low oxeygen Carbon the cat con is now
> > by passed as it was burned out anyways like the guts were gone straight
> > pipe?
>
> Could also be that the sensor wire has an intermittent/bad connection OR
> is to close to something hot and the insulation is melted/damaged and
> it shorted out for a bit.
>
> --
> Steve W.
> Near Cooperstown, New York
>
> Life is not like a box of chocolates
> it's more like a jar of jalapenos-
> what you do today could burn your ass tomorrow!
>
> ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption =----

I did some googleing and what seems to be making sense is a intake leak
somewhere. After all it only happens when the throttle is open alot like
hills or steady grade at 80 kmh and up when towing. I did replace all
the leaky vacumm
hoses allready but I must have missed something. Under load the ac vents
used to go too defrost Climbing big hills it still does this the odd
time?
Where are the other common leaks on the 4.3 w engine? I do get a slight
stutter when light accelerating of the line other wise it runs perfect.
Could that be related to a vacumm leak?

no one that you know wrote:
>
> Some days I love this truck and some days I wud................
> Anyways when I am towing my small camper about 2000 lbs loaded and
> trying to do the long haul up hills with ac on driving semi nice a
> little ruff I guess...the check engine light has been comming on and I
> go thru a shit load of fuel like 300 km's per tank.
> The van gets rated 20-21 mpg when I am not towing ( crappy but that is
> what it is rated at) it is more like 8-10 when I am towing.
> And lo and behold the code I get (44 Oxygen sensor voltage was under
> 0.25 volts for up to 4 1/2 minutes of closed loop operation.) is for the
> one sensor I allready replaced. What would cause this reading? Could
> timming or just crap gas give this reading? What is that reading? Rich
> or lean? My guess is rich ie no or low oxeygen Carbon the cat con is now
> by passed as it was burned out anyways like the guts were gone straight
> pipe?

In article <44F43BCA.D4886CDD@shaw.ca>,
no one that you know <nooneshome@shaw.ca> wrote:

> Oh ya oops 1994 w engine and yes the leaky cpi was replaced about 30 k
> ago
>
> aarcuda69062 wrote:
> >
> > In article <44F3A5AD.FD31BDA2@shaw.ca>,
> > no one that you know <nooneshome@shaw.ca> wrote:
> >
> > > Some days I love this truck and some days I wud................
> > > Anyways when I am towing my small camper about 2000 lbs loaded and
> > > trying to do the long haul up hills with ac on driving semi nice a
> > > little ruff I guess...the check engine light has been comming on and I
> > > go thru a shit load of fuel like 300 km's per tank.
> > > The van gets rated 20-21 mpg when I am not towing ( crappy but that is
> > > what it is rated at) it is more like 8-10 when I am towing.
> > > And lo and behold the code I get (44 Oxygen sensor voltage was under
> > > 0.25 volts for up to 4 1/2 minutes of closed loop operation.) is for the
> > > one sensor I allready replaced. What would cause this reading? Could
> > > timming or just crap gas give this reading? What is that reading? Rich
> > > or lean? My guess is rich ie no or low oxeygen Carbon the cat con is now
> > > by passed as it was burned out anyways like the guts were gone straight
> > > pipe?
> >
> > Q) Why in the hell would we need to know the model year?
> >
> > A) Because 4.3 liter engines in GMC Safari vans came as;
> > 1) Carbureted
> > 2) Throttle body fuel injection
> > 3) Central Port Fuel Injected
> > 4) Central Sequential Port Fuel Injected

Under the conditions that set the code, your engine is under
fueling (running lean).
Possible causes are a weak fuel pump, clogged fuel filter,
clogged injectors, skewed MAP sensor, skewed coolant sensor.

Doubt that it's a vacuum leak since it only occurs at or near
wide open throttle.

Ya figures .....i guess the only solution is trial and error and replace
every sensor one by one one eh!

aarcuda69062 wrote:
>
> In article <44F43BCA.D4886CDD@shaw.ca>,
> no one that you know <nooneshome@shaw.ca> wrote:
>
> > Oh ya oops 1994 w engine and yes the leaky cpi was replaced about 30 k
> > ago
> >
> > aarcuda69062 wrote:
> > >
> > > In article <44F3A5AD.FD31BDA2@shaw.ca>,
> > > no one that you know <nooneshome@shaw.ca> wrote:
> > >
> > > > Some days I love this truck and some days I wud................
> > > > Anyways when I am towing my small camper about 2000 lbs loaded and
> > > > trying to do the long haul up hills with ac on driving semi nice a
> > > > little ruff I guess...the check engine light has been comming on and I
> > > > go thru a shit load of fuel like 300 km's per tank.
> > > > The van gets rated 20-21 mpg when I am not towing ( crappy but that is
> > > > what it is rated at) it is more like 8-10 when I am towing.
> > > > And lo and behold the code I get (44 Oxygen sensor voltage was under
> > > > 0.25 volts for up to 4 1/2 minutes of closed loop operation.) is for the
> > > > one sensor I allready replaced. What would cause this reading? Could
> > > > timming or just crap gas give this reading? What is that reading? Rich
> > > > or lean? My guess is rich ie no or low oxeygen Carbon the cat con is now
> > > > by passed as it was burned out anyways like the guts were gone straight
> > > > pipe?
> > >
> > > Q) Why in the hell would we need to know the model year?
> > >
> > > A) Because 4.3 liter engines in GMC Safari vans came as;
> > > 1) Carbureted
> > > 2) Throttle body fuel injection
> > > 3) Central Port Fuel Injected
> > > 4) Central Sequential Port Fuel Injected
>
> Under the conditions that set the code, your engine is under
> fueling (running lean).
> Possible causes are a weak fuel pump, clogged fuel filter,
> clogged injectors, skewed MAP sensor, skewed coolant sensor.
>
> Doubt that it's a vacuum leak since it only occurs at or near
> wide open throttle.

and the fuel pump might as well been left starnded by this
before.....jeeze i miss the old days when 10 mpg was good.

no one that you know wrote:
>
> Ya figures .....i guess the only solution is trial and error and replace
> every sensor one by one one eh!
>
> aarcuda69062 wrote:
> >
> > In article <44F43BCA.D4886CDD@shaw.ca>,
> > no one that you know <nooneshome@shaw.ca> wrote:
> >
> > > Oh ya oops 1994 w engine and yes the leaky cpi was replaced about 30 k
> > > ago
> > >
> > > aarcuda69062 wrote:
> > > >
> > > > In article <44F3A5AD.FD31BDA2@shaw.ca>,
> > > > no one that you know <nooneshome@shaw.ca> wrote:
> > > >
> > > > > Some days I love this truck and some days I wud................
> > > > > Anyways when I am towing my small camper about 2000 lbs loaded and
> > > > > trying to do the long haul up hills with ac on driving semi nice a
> > > > > little ruff I guess...the check engine light has been comming on and I
> > > > > go thru a shit load of fuel like 300 km's per tank.
> > > > > The van gets rated 20-21 mpg when I am not towing ( crappy but that is
> > > > > what it is rated at) it is more like 8-10 when I am towing.
> > > > > And lo and behold the code I get (44 Oxygen sensor voltage was under
> > > > > 0.25 volts for up to 4 1/2 minutes of closed loop operation.) is for the
> > > > > one sensor I allready replaced. What would cause this reading? Could
> > > > > timming or just crap gas give this reading? What is that reading? Rich
> > > > > or lean? My guess is rich ie no or low oxeygen Carbon the cat con is now
> > > > > by passed as it was burned out anyways like the guts were gone straight
> > > > > pipe?
> > > >
> > > > Q) Why in the hell would we need to know the model year?
> > > >
> > > > A) Because 4.3 liter engines in GMC Safari vans came as;
> > > > 1) Carbureted
> > > > 2) Throttle body fuel injection
> > > > 3) Central Port Fuel Injected
> > > > 4) Central Sequential Port Fuel Injected
> >
> > Under the conditions that set the code, your engine is under
> > fueling (running lean).
> > Possible causes are a weak fuel pump, clogged fuel filter,
> > clogged injectors, skewed MAP sensor, skewed coolant sensor.
> >
> > Doubt that it's a vacuum leak since it only occurs at or near
> > wide open throttle.

In article <44F4FAC5.CA5A3AF3@shaw.ca>,
no one that you know <nooneshome@shaw.ca> wrote:

> Ya figures .....i guess the only solution is trial and error and replace
> every sensor one by one one eh!

Yup. Swapnostics.
(those test procedures are -so- boring)