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Old 07-05-2007, 06:19 AM   #1
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Default Why do people like to idle diesel engines?

I've seen many trucks and buses do that. Is it because they are not paying for the gas? Or is it harder to start a diesel (some old school thinking) up again?

I've also seem many people idle a diesel engines for a pickup/SUV. Is it because they get better MPG so they can waste gas? For some reason, I don't see too many people idle gas engines. Is it more cool to idle it cause it makes more noise? It has nothing to do with keeping the AC on during the hot summer. I noticed this all year round.
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Old 07-05-2007, 06:21 AM   #2
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Are you referring to Trucks/Ambulances/FireTrucks/etc?

I know emergency vehicles HAVE to keep the car/truck running in the event of an emergency.

And trucks (semi's) I was under the impression it was to have the entertainment stuff and heat/ac to continue going without killing the battery. (Like at a bus stop)

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Old 07-05-2007, 06:22 AM   #3
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Default Re: Why do people like to idle diesel engines? (YipMan_Style)

Where are you seeing these vehicles idle? If it's at truck stops, it's because they have their A/C and whatnot on.
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Old 07-05-2007, 06:24 AM   #4
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Default Re: (TheMuffinMan)

There's actually a bill that's trying to pass to make it illegal for trucks and buses to idle for a certain amount of time when just sitting. Truck drivers tend to leave their trucks running all night when they're sleeping to have a/c or heat running.
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Old 07-05-2007, 06:24 AM   #5
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Default Re: (TheMuffinMan)

Quote:
Originally Posted by TheMuffinMan
Are you referring to Trucks/Ambulances/FireTrucks/etc?

I know emergency vehicles HAVE to keep the car/truck running in the event of an emergency.
And alot of them have computers/radios/equipment running while they're in service, so they idle to save the battery.
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Old 07-05-2007, 06:25 AM   #6
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Default Re: (TheMuffinMan)

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Originally Posted by TheMuffinMan
I know emergency vehicles HAVE to keep the car/truck running in the event of an emergency.
That's incorrect. Emergency vehicles keep their engines running so that they can cool down. Well, they also use the engine to power some of the functions, i.e. lights, computers, pumps, etc.

A lot of people like construction workers, property appraisers, etc will sit in their diesel truck with it running and the A/C or power on as they fill out reports, etc
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Old 07-05-2007, 06:28 AM   #7
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Default Re: (Lewie)

nys law prevents not emergency idling &gt; 3minutes...
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Old 07-05-2007, 06:30 AM   #8
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Default Re: Why do people like to idle diesel engines? (YipMan_Style)

I let my little diesel idle when I'm running in a store, deli, bank because it runs like crap when it first starts up/is cold.
also, in 5-10 minutes when its cold, you'll need to wait for the glow plugs to warm up again.

(plus it sounds cool Click the image to open in full size. )
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Old 07-05-2007, 06:31 AM   #9
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Default Re: Why do people like to idle diesel engines? (Limited S.L.I.P.)

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Originally Posted by Limited S.L.I.P.
I let my little diesel idle when I'm running in a store, deli, bank because it runs like crap when it first starts up/is cold.
also, in 5-10 minutes when its cold, you'll need to wait for the glow plugs to warm up again.

(plus it sounds cool Click the image to open in full size. )
You do realize it's illegal to leave a vehicle unattended while running, correct?

btw: I would do the same thing if I had a diesel. Click the image to open in full size.
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Old 07-05-2007, 06:43 AM   #10
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Default Re: Why do people like to idle diesel engines? (YipMan_Style)

I'm not talking about emergency vehicals or buses at a bus stop. I understand that.

My neighbor has a visitor that comes by for a few minutes, and always leave their diesel engine running on the Excursion. I've seen it often at the supermarket, etc. Just in situation where there is no reason to keep it running.

Maybe I just noticed it more because it's diesel vs. gas engines.

Yeah, the glow plugs is what I read. But hasn't modern technology solved that problem?
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Old 07-05-2007, 06:48 AM   #11
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Default

Interesting Lewie, I've had quite a few EMT's that I know that that's why they're left on.
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Old 07-05-2007, 06:49 AM   #12
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Default Re: Why do people like to idle diesel engines? (Lewie)

Quote:
Originally Posted by Lewie

You do realize it's illegal to leave a vehicle unattended while running, correct?

btw: I would do the same thing if I had a diesel. Click the image to open in full size.
yeah, but this is actually the first vehicle that cops NEVER bother me in! I've actually left it running parked in the space next to two cops drinking coffee and all they said when i got back was "how many mpg are you getting in that?"
I'm currently driving it with no inspection, no registration sticker (its in the glove box), no front plate, no seat belts, one brake light, cracked windshield, no rear view mirror, and black diesel smoke from the exhaust.... all that cops give me are smile and waves! Click the image to open in full size.
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Old 07-05-2007, 06:49 AM   #13
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Default Re: Why do people like to idle diesel engines? (Lewie)

Quote:
Originally Posted by Lewie

You do realize it's illegal to leave a vehicle unattended while running, correct?
How do you explain people with turbo'd vehicles running a turbo timer. And it's idling when your away from the car.

When my car's turbo timer is on, I walk away and leave it alone. Shuts off automatically of course, and locks itself.
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Old 07-05-2007, 06:50 AM   #14
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The glow plugs only take a few seconds to get warmed up. I leave the truck running at work just to show that I plan on being back shortly. When I have to go out of town for work in a truck, I keep it running so I can have the AC/heat work while I sleep.
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Old 07-05-2007, 06:52 AM   #15
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Default Re: (SuperSteve737)

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The glow plugs only take a few seconds to get warmed up.
I wish mine only took a few seconds! on a cold morning theyll easily take a minute. Click the image to open in full size.
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Old 07-05-2007, 07:03 AM   #16
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Default Re: Why do people like to idle diesel engines? (YipMan_Style)

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Originally Posted by YipMan_Style
I'm not talking about emergency vehicals or buses at a bus stop. I understand that.

My neighbor has a visitor that comes by for a few minutes, and always leave their diesel engine running on the Excursion. I've seen it often at the supermarket, etc. Just in situation where there is no reason to keep it running.

Maybe I just noticed it more because it's diesel vs. gas engines.

Yeah, the glow plugs is what I read. But hasn't modern technology solved that problem?
Because they are jackasses and want to feel all badass.
Unless it is the middle of the winter and there is some feasible reason to have it idle, thats pretty much the answer.

On a side note, UPS and other diesel delivery trucks ALWAYS turn it off when making stops.
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Old 07-05-2007, 07:08 AM   #17
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Trucks idle to save their battery when using accessories. They also idle for HVAC reasons.

Diesel trucks also idle to cool down the turbo before shutting down... like a turbo timer.
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Old 07-05-2007, 07:14 AM   #18
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Default Re: Why do people like to idle diesel engines? (Farmer Brown)

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On a side note, UPS and other diesel delivery trucks ALWAYS turn it off when making stops.
Most UPS trucks here are gas. They sound diesel but its their trans.
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Old 07-05-2007, 07:17 AM   #19
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Default Re: Why do people like to idle diesel engines? (Farmer Brown)

http://www.transportation.anl.....html

i was astonished to read in another article that a typical class 8 truck idling @ 900RPM will consume 1 gallon of fuel per hour.

I let my shop dually idle most of the time when I am running errands just cause of how hot it is here in OK right now, and also it doesn't take long for the engine to cool off. I even let my Impala idle most of the time if I am out running errands(to let the A/C run), but for safety reasons I turn it off, get out, the remote start it so the alarm will be on .

When I used to operate an excavator, during the wintertime, and even sometimes at night, the engine would actually lose all of its heat just from idling. For the engine to stay warm enough I would have to maintain at least 50% throttle even when the machine was sitting idle.
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Old 07-05-2007, 07:44 AM   #20
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Default Re: Why do people like to idle diesel engines? (BrokeAssWhiteboy)

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http://www.transportation.anl.....html

i was astonished to read in another article that a typical class 8 truck idling @ 900RPM will consume 1 gallon of fuel per hour.
That # doesn't surprise me. A few weeks ago I took a '98 Freightliner + 51 foot trailer from Chicago to Seattle and back. Averaged 6 mpg.
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Old 07-05-2007, 07:46 AM   #21
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Default Re: (Limited S.L.I.P.)

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Originally Posted by Limited S.L.I.P.
I wish mine only took a few seconds! on a cold morning theyll easily take a minute. Click the image to open in full size.
On what? Your 81 VW? Didn't know they could take that long. In every truck I have ever driven, the glow plug light (on those equipped with one), would only stay lit for between 2-10 seconds, at the most. Even on cold Chicago winter days.
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Old 07-05-2007, 07:50 AM   #22
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Default Re: Why do people like to idle diesel engines? (SuperSteve737)

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Averaged 6 mpg.
Jesus Click the image to open in full size.
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Old 07-05-2007, 07:57 AM   #23
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Default Re: Why do people like to idle diesel engines? (SuperSteve737)

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That # doesn't surprise me. A few weeks ago I took a '98 Freightliner + 51 foot trailer from Chicago to Seattle and back. Averaged 6 mpg.
Click the image to open in full size.
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Old 07-05-2007, 08:00 AM   #24
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Default Re: (lke2drvgsr)

What is funny is that I was wondering the same damn thing today.

Everytime I see a Diesel Truck, say a F250 or some ****, they never turn it off and always leave it idle.

There is a dry cleaning company in my shopping plaza where I work, and every damn time I go out during my lunch break I see some Diesel truck idling.

Weird.
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Old 07-05-2007, 08:06 AM   #25
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Default Re: Why do people like to idle diesel engines? (Limited S.L.I.P.)

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yeah, but this is actually the first vehicle that cops NEVER bother me in! I've actually left it running parked in the space next to two cops drinking coffee and all they said when i got back was "how many mpg are you getting in that?"
I'm currently driving it with no inspection, no registration sticker (its in the glove box), no front plate, no seat belts, one brake light, cracked windshield, no rear view mirror, and black diesel smoke from the exhaust.... all that cops give me are smile and waves! Click the image to open in full size.
pics of said truck Click the image to open in full size.
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