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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Jul-31-2017, 05:28:51 PM   #21
TheDoogan
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Default Re: Getting Gas with the Engine Running

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Originally Posted by albino09 View Post
I'm not sure of 01-06 OBD regulations, but any car built today would throw a DTC for "Gross Evap Leak" on second ignition cycle. I suppose if it's during warmup and you never shut the car off, this probably won't store. This DTC would not cause any change in performance.

It's not a smart move as far as safety is concerned. Static electricity, heat from the exhaust and source of fuel isn't a great combo.
(I'm not worried about static, know how to dissipate; I'm not worried about exhaust heat, it's not going to be much less hot just because the car is off; Not worried about my car rolling away, driving away, etc etc. My question related to decreased engine performance as a result of the CEL consequence of a loose gas cap - thanks for weighing in on this, and thanks to all.)
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Old Mon, Jul-31-2017, 05:49:10 PM   #22
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Default Re: Getting Gas with the Engine Running

Personally, I would (and do) just make a habit of filling up when the tank gets to half empty or so. That way you don't have to worry about getting gas in the morning, nor will you have any issue with keeping the fuel pump cool/getting too much condensation in your tank
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Old Mon, Jul-31-2017, 07:40:27 PM   #23
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Default Re: Getting Gas with the Engine Running

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Would be embarrassing if you were in the "big house" and fellow inmates were asking what you in for and all you had was filling up while engine running!
You tell 'em that and you'll know exactly what cell block you're headed to.

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Old Mon, Jul-31-2017, 07:44:05 PM   #24
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Default Re: Getting Gas with the Engine Running

I have a bit of a different issue in the morning. From my house to the freeway is about 6 blocks. When really cold the engine gets to idle a bit while I scrape snow and ice. (but then I'm driving my pickup but same issue) However by the time I'm getting on the freeway engine is still cold. I get on the right lane and get up to about 50 for the half mile of freeway. I'm always amazed at the people that get on the freeway and are up to 70 with cold engines.
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Old Mon, Jul-31-2017, 08:04:52 PM   #25
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Default Re: Getting Gas with the Engine Running

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You tell 'em that and you'll know exactly what cell block you're headed to.

Yup! Not that I have any experience.
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Old Mon, Jul-31-2017, 08:06:10 PM   #26
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Default Re: Getting Gas with the Engine Running

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Originally Posted by qualicas View Post
I have a bit of a different issue in the morning. From my house to the freeway is about 6 blocks. When really cold the engine gets to idle a bit while I scrape snow and ice. (but then I'm driving my pickup but same issue) However by the time I'm getting on the freeway engine is still cold. I get on the right lane and get up to about 50 for the half mile of freeway. I'm always amazed at the people that get on the freeway and are up to 70 with cold engines.


70 is 3k rpm? Is that bad? It's not freezing here in SoCal but... engines still "cold"...
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Old Mon, Jul-31-2017, 08:11:51 PM   #27
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Default Re: Getting Gas with the Engine Running

Well, technically that is what those moving Red lights are for. Engine cold lower Redline. In summer not much of an issue but when it is -20F even synthetic oil is not running freely. Where you do not experience anything below 50F, engine is probably fine after 3 minutes of driving. But still not the time to test your top speed.
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Old Mon, Jul-31-2017, 08:29:24 PM   #28
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Default Re: Getting Gas with the Engine Running

When I was in Vietnam on a tour van. They filled up with the engine running every single time. Not once did they shut off the engine. Nearly everyone had their engines running while filling up. The first time, I told everyone to get out and we'll wait until it's done filling up. After awhile, we just ignored it. Not sure if they still do that, it's been awhile.
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Old Mon, Jul-31-2017, 08:44:02 PM   #29
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Default Re: Getting Gas with the Engine Running

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Originally Posted by qualicas View Post
I have a bit of a different issue in the morning. From my house to the freeway is about 6 blocks. When really cold the engine gets to idle a bit while I scrape snow and ice. (but then I'm driving my pickup but same issue) However by the time I'm getting on the freeway engine is still cold. I get on the right lane and get up to about 50 for the half mile of freeway. I'm always amazed at the people that get on the freeway and are up to 70 with cold engines.
I know, I hate that. My equivalent is that I have two opportunities to get dynamic around corners that are about 4 minutes from my house, which I always go by on my way out of town. Such a shame to not be able to get on it and break loose, haha.
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Old Mon, Jul-31-2017, 09:22:44 PM   #30
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Default Re: Getting Gas with the Engine Running

Any thoughts on idling for 1-2 mins before shut off after hard driving?
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Discussing Getting Gas with the Engine Running in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)