Extended Idling / Wet Stacking
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Mountain Pass
Joined: May 2004
Posts: 188
Likes: 2
From: Ada, Michigan
Extended Idling / Wet Stacking
The diesel tech at my Ford dealer says he has never heard of any issues with wet-stacking (wasnt familiar with the term) and said there is no problem with letting my 05/2004 F250 6.0 idle for periods of time, that in fact it is better to let it idle that to shut it off. This contradicts what I have read on this site. Any insight (other than the typical change dealerships answer) would be great. Did they change anything in the late 2004's that make it okay to let them idle for extended periods of time w/o an auxillary idle controller?
Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
Is he a registered diesel tech or does he just handle the diesels at the dealer? Anyone who would go so far as to say there have never heard of wet stacking isn't that reputable in my book. No, it is not OK to let them idle for extended periods of time without an AIC. The problem is that combustion temps get too low which causes the wet stacking. Even when the vehicle automatically idles up after a certain period of time, it sometimes is not enough in cold weather.
Junior User
Joined: Apr 2004
Posts: 91
Likes: 0
Everything is relative. Is extended idle periods, or any idle periods, worse than sand in the oil? No. Running any engine is bad for it. So is not running it. Everything has some negative consequence. You just have to determine what you are willing to live with. I personally do not shut the engine off aproaching every stop sign to avoid idle speeds. Pick your poisions wisely.
Regards,
Morris
Regards,
Morris
Elder User
Joined: Mar 2004
Posts: 790
Likes: 1
From: Fort. Lauderdale FL,
I'm no diesel expert, but i do have to say that i always leave my engine running if im going into a store or somthing. Atleast where i can watch it from the window even with locking. like a 7-11 for a slurpee type deal. If im going in and out 10 min or so then i dont see a problom with the wet stacking but then again if it is temps that play affects im in south florida. Yeah its like mid 90's but with 90% or more humidity it feels like 200. That engie heats up to normal temp down here with only idling in about 4 min. Is it bad i dont know, i havent seen or felt a problom with it. I personally think it would be worse to shut it off for 5 min to go into a store...just my thoughts as wrong as they may be...i dont know . would like to know though if i am.
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Post Fiend
Joined: Oct 2002
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my 03 Ex has 32K+ miles and typically has an av mpg of about 11 or so becaus I idle it a LOT - have a remote start and will crank it before I get there and leave it idleing all the time...
sorry... it's too hot here in North Texas to be witout air too long !
sorry... it's too hot here in North Texas to be witout air too long !
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Post Fiend
Joined: Aug 2002
Posts: 5,324
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From: Denton,TX
Originally Posted by jdadamsjr
sorry... it's too hot here in North Texas to be witout air too long !
Post Fiend
Joined: Oct 2002
Posts: 11,314
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I think just sitting out in our sun it's already warmed up 
I put the roof racks back on for a weekend trip and because my Ex is black, I actually burned my forearms leaning over that hot thing
be so glad when the new house is done - will be able to actually park it in an oversized garage
I put the roof racks back on for a weekend trip and because my Ex is black, I actually burned my forearms leaning over that hot thing
be so glad when the new house is done - will be able to actually park it in an oversized garage
Senior User
Joined: May 2004
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Never heard of wet stacking but sounds like it might be like a condition you have in heavy marine diesels that don't use such refined fuel. If they're run at light load for extended periods carbon builds up in the exhaust system. Then when the engine is runs at or near max power the hot exhaust ignites the carbon and a stack fire can result. Had one when hove to in the ice off Grand Haven Michigan one night. Gave the locals quite a fireworks show as the red hot carbon particles lit up the sky. Also lit up the phone lines at the Coast Guard Station.
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