> 1992 b250 van 318 cu - very low miles
> Twice over the past year, which is about all I've used this truck, after
[quoted text clipped - 4 lines]
> isn't the problem. Anyone seen this before?
> bg
Just curious, but why are you sure part of the problem isn't the O2 sensor?
rach
TBone - 01 Mar 2006 01:20 GMT
Because when a cold FI engine is first started, it is in open loop mode and
the inputs from the O2 sensors are ignored

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> > 1992 b250 van 318 cu - very low miles
> > Twice over the past year, which is about all I've used this truck, after
[quoted text clipped - 7 lines]
> Just curious, but why are you sure part of the problem isn't the O2 sensor?
> rach
Rachel Easson - 01 Mar 2006 12:52 GMT
> Because when a cold FI engine is first started, it is in open loop mode and
> the inputs from the O2 sensors are ignored
Thanks TBone. As you know, I am not good with newfound FI or emissions
technology <grn>. I'll look up how "open loop mode" works. (and stick to
the old models)
rach
TBone - 03 Mar 2006 03:43 GMT
Why stick to the older models when the new ones work so much better.

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> > Because when a cold FI engine is first started, it is in open loop mode and
> > the inputs from the O2 sensors are ignored
[quoted text clipped - 3 lines]
> the old models)
> rach
Rachel Easson - 03 Mar 2006 14:34 GMT
> Why stick to the older models when the new ones work so much better.
Dear TBone,
<grunt> because I have no clue with the new ones, and TBone, maybe I'm
an old dog afraid to try new tricks! (pun intended!) <grn>
and no money
rach
(not that if I had the cash I wouldn't buy a top-of-the line charger
srt8 toy, and then go to town putting a Cummins 610 diesel into this
summer's ram project
http://www3.sympatico.ca/rske/images/wheelbarrow.jpg instead of an old
360 from a 74 powerwagon, and restore the body and a custom paint
job...) dream, dream, dream
bg - 01 Mar 2006 18:30 GMT
Rachel Easson wrote in message ...
>> 1992 b250 van 318 cu - very low miles
>> Twice over the past year, which is about all I've used this truck, after
[quoted text clipped - 7 lines]
>Just curious, but why are you sure part of the problem isn't the O2 sensor?
>rach
Beside Tbones response, I would suspect that the o2 sensor is telling me
that I'm pumping some unfired gas due to long cranking periods?
bg
TBone - 03 Mar 2006 03:48 GMT
> Rachel Easson wrote in message ...
> >> 1992 b250 van 318 cu - very low miles
[quoted text clipped - 12 lines]
> that I'm pumping some unfired gas due to long cranking periods?
> bg
While possible, it is also highly unlikely. By the time the system returns
to closed loop more and is paying attention to the sensors that way, any
excess fuel should have been burned away and if not, you would be smelling a
fairly strong smell of gas. The sensor may either be bad or is indicating
an actual fuel delivery problem.

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