Maybe newer fuel injected engines are different than carberated engines, but I thought it was bad to idle a gasoline engine for an extended period of time for several reasons. First, the engine burns richer at idle than at speed, which allows some of the fuel to rinse the oil off of the cylinder walls causing more rapid wear than running the engine at speed. Secondly, with water being a byproduct of all combustion, there may not be enough heat produced at idle to keep the water in a vapor state all the way through the exhaust system. Therefore, the water condenses in the exhaust system and starts to fill up the exhaust system and start corrosion. Water condenses in the engine block as well when the engine is cool, when the engine is up to operating temperature the oil is hot enough to vaporize the water and send it out the PCV valve.
As I said at the beginning these issues may not apply to newer fuel injected engines, but These are considerations. I, also, may be all wet as this applies to the FJ.
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2008 Sandstorm 6MT
285/75/16 Cooper STT, DO Front Bumper, Warn M-8000, TG Sliders, Sway-Away Racerunner on all 4 corners, Camburg UCAs, Scan Guage, Hella 4000, Acro lights in Bumper, Cobra 75WX CB Radio.
Location: Montgomery, AL is home.... Auburn, AL is school.
Posts: 527
Re: How long would the FJ idle for?
A couple of days ago my Scanguage was reporting 0.49 gallons-per-hour. It was close to 100 degrees outside though, so in cooler temps I bet it would burn less than that.... Math comes out to be 38 hours on a full tank!
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The Tale of Father Jenkins (My build):
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My scangauge reads .35 gal per hr at idle with the heat on. Had to spend a night in it in a blizzard last winter and it barely used any fuel at all. Temp was constant in the engine so far as I knew while I was sleeping but did not exceed 190.
Usually in the winter I carry a jerry can on my roof when going over remote passes just in case I have to spend the night in a snowbank.
A couple of days ago my Scanguage was reporting 0.49 gallons-per-hour. It was close to 100 degrees outside though, so in cooler temps I bet it would burn less than that.... Math comes out to be 38 hours on a full tank!
Can I assume that was with the A/C on?
DEWFPO
__________________ 2007 FJ, 5AT, Sun Fusion Yellow, CQ, UP, GY, RB, 2Q, EL, VS.
"Wanted - young, skinny, wiry fellows, not over 18. Must be expert riders willing to risk death daily. Orphans preferred"
Original newspaper add placed by William Hepburn Russell, founder of the The Pony Express
I would be worried about stopping up the cat converters on the truck. Cats don't like a lot of idle time. And they will stop up and cost you lots of money. You are just waiting to replace them when you Idle all night.
Okay, so we have figured it to be nearly 40 hours.
Let's pose the question from another angle...
How FAR will the FJ idle on a full tank of gas? Hmmm? How about THAT one ScanGage geeks!
Inquiring Minds want to know. What, with the Summit fast approaching and a round trip of nearly 5000 miles ahead of me. Maybe idling all the way there and back could save me some MUCHO DINERO!
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-Matt
2008 AT 4x4 Voodoo Blue FJ with not enough trail pin-striping
Maybe newer fuel injected engines are different than carberated engines, but I thought it was bad to idle a gasoline engine for an extended period of time for several reasons. First, the engine burns richer at idle than at speed, which allows some of the fuel to rinse the oil off of the cylinder walls causing more rapid wear than running the engine at speed. Secondly, with water being a byproduct of all combustion, there may not be enough heat produced at idle to keep the water in a vapor state all the way through the exhaust system. Therefore, the water condenses in the exhaust system and starts to fill up the exhaust system and start corrosion. Water condenses in the engine block as well when the engine is cool, when the engine is up to operating temperature the oil is hot enough to vaporize the water and send it out the PCV valve.
As I said at the beginning these issues may not apply to newer fuel injected engines, but These are considerations. I, also, may be all wet as this applies to the FJ.
I am agree, plus depleted lubrication in far spots of engine, so - rapid engine wear...
__________________ EAST OR WEST - HOME IS BEST
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2008 Model FJC 4X4 AT Titanium Metallic
Factory Inst: FE CQ OF
Port Inst: C7 2Q FO
Options: 5L 3B SO 37
2007 FJ, 5AT, Sun Fusion Yellow, CQ, UP, GY, RB, 2Q, EL, VS.
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