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 | | From: | DaveD | | Subject: | Isuzu switch function?? | | Date: | Sun, 02 Jan 2005 00:26:39 +1300 |
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 | Hi all
Over the last few days I have been driving an Isuzu Elf 250 truck and am
puzzled by the function / purpose of one switch on the dash.
It appears to be factory fitted, on the right of the dash , with an icon
that looks like an engine block with a helix (similar to the preheat
indicator) in / over it.
When switched on it is illuminated (green) and appears to affect the
engine speed. (Idle speed drops)
If it is left on for about 30 seconds the low air pressure buzzer
sounds. The buzzer goes off about 10 seconds after the switch is turned off.
Can anyone tell me what the function of this switch is?
The last truck I had much to do with was a 1970's Ford 5 tonner (when it
was new) and Google has not been any help 8-(
D
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| | From: | Bruce Knox | | Subject: | Re: Isuzu switch function?? | | Date: | Sun, 02 Jan 2005 10:24:13 +1300 |
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| On Sun, 02 Jan 2005 00:26:39 +1300, DaveD wrote:
>Hi all
>Over the last few days I have been driving an Isuzu Elf 250 truck and am
>puzzled by the function / purpose of one switch on the dash.
>
>It appears to be factory fitted, on the right of the dash , with an icon
>that looks like an engine block with a helix (similar to the preheat
>indicator) in / over it.
>
>When switched on it is illuminated (green) and appears to affect the
>engine speed. (Idle speed drops)
>
>If it is left on for about 30 seconds the low air pressure buzzer
>sounds. The buzzer goes off about 10 seconds after the switch is turned off.
>
>Can anyone tell me what the function of this switch is?
>
>The last truck I had much to do with was a 1970's Ford 5 tonner (when it
>was new) and Google has not been any help 8-(
>
>D
Hi,
Dont know your truck but I have an Isuzu MU that probably has
a similar engine (3.1 litre turbo). The switch sounds like the cold
start one. It turns on heaters in the sump, deisel lines, and does all
sorts of things to do with recirculating exhaust gases. All designed
to heat the engine quicker in very cold weather. Deisels hate to be
worked when cold. Only needed if you are starting the engine in near
freezing conditions. The weather has been cold but probably not that
cold. If you leave it on the light will go out after about 5 minutes
when it has done its thing.
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| | From: | Gavin Stephens | | Subject: | Re: Isuzu switch function?? | | Date: | Sun, 2 Jan 2005 12:40:57 +1300 |
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"Bruce Knox" wrote in message
news:go4et019a1kclrh9j1tgljb77nb95vqq3v@4ax.com...
> On Sun, 02 Jan 2005 00:26:39 +1300, DaveD wrote:
>
> >Hi all
> >Over the last few days I have been driving an Isuzu Elf 250 truck and am
> >puzzled by the function / purpose of one switch on the dash.
> >
> >It appears to be factory fitted, on the right of the dash , with an icon
> >that looks like an engine block with a helix (similar to the preheat
> >indicator) in / over it.
> >
> >When switched on it is illuminated (green) and appears to affect the
> >engine speed. (Idle speed drops)
> >
> >If it is left on for about 30 seconds the low air pressure buzzer
> >sounds. The buzzer goes off about 10 seconds after the switch is turned
off.
> >
> >Can anyone tell me what the function of this switch is?
> >
> >The last truck I had much to do with was a 1970's Ford 5 tonner (when it
> >was new) and Google has not been any help 8-(
> >
> >D
> Hi,
> Dont know your truck but I have an Isuzu MU that probably has
> a similar engine (3.1 litre turbo). The switch sounds like the cold
> start one. It turns on heaters in the sump, deisel lines, and does all
> sorts of things to do with recirculating exhaust gases. All designed
> to heat the engine quicker in very cold weather. Deisels hate to be
> worked when cold. Only needed if you are starting the engine in near
> freezing conditions. The weather has been cold but probably not that
> cold. If you leave it on the light will go out after about 5 minutes
> when it has done its thing.
I had that on my Mu, D is right, it's a sump heater and
exhaust gas reticulator and keeps the glow plugs on
a little longer. But it does make the truck run like crap
if it's not that cold and shouldn't really be driven with it
on as the exchaust gas reticulation doesn't provide
the irght mixture for working the engine, just warming
it up on idle.
Mine always turned over on the first crank following
the quick glow plug warm up of about 5 seconds in it. Never
ever had to use the warm up switch, although I did use it after
being out at -5 all night just to get the engine warmer so the
cab heater warmed quicker, as "I" don't like being
worked while cold either.
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| | From: | DaveD | | Subject: | Re: Isuzu switch function?? | | Date: | Thu, 06 Jan 2005 01:37:17 +1300 |
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| Gavin Stephens and Bruce Knox wrote lots of good stuff.
Thanks guys
Dave
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