weirdest problem you've ever had ?
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Cargo Master
Joined: Aug 2008
Posts: 2,661
Likes: 23
weirdest problem you've ever had ?
Today I had a quart of oil come out a full gas tank on my brothers truck (as in out the fuel cap) . No idea. But it got me thinking, what's the weirdest problem you'be ever had on your truck?
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Cargo Master
Joined: Aug 2008
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Yeah I really have no idea. Sometimes when I fill it up and park it at a slight angel at night, the heat from the next day pushes out some gas. This time it pushed out a lot of oil too. The engine was full of oil and is now at the add line at the bottom. Best I can figure is a crack in the fuel pump and its been draining in since last I filled it. But even then, how the hell did it back travel the line right ?
Logistics Pro
Joined: Apr 2010
Posts: 3,577
Likes: 29
From: Pekin, IL
Yeah I really have no idea. Sometimes when I fill it up and park it at a slight angel at night, the heat from the next day pushes out some gas. This time it pushed out a lot of oil too. The engine was full of oil and is now at the add line at the bottom. Best I can figure is a crack in the fuel pump and its been draining in since last I filled it. But even then, how the hell did it back travel the line right ?
edit: oil is around .89-.96ish gasoline is .71-73ish so gas would float on the oil technically...right?
I am confused now...can someone confirm this or correct me?
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Logistics Pro
Joined: Apr 2010
Posts: 3,577
Likes: 29
From: Pekin, IL
Can you tell I have nothing to do? I have been looking up any other fluids in automotive use, for specific gravity. water is basically a 1.00 antifreeze is a little heavier, it would sink in water. any oil, brake fluid, auto tranny fluid, grease, is heavier than gas. gas would float on any fluid used in an automotive application, at least according to sp. gravity. So if I am wrong...well at least you gave me something to do!
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Laughing Gas
Joined: Jun 2011
Posts: 1,041
Likes: 53
From: Sterling CO
ok, so dumb question, what was the temp today in sheridan wy.....
Gas expands when it warms up. In the summer you get some "barfing" if you top it off to the very top, in the winter up north I would think instead you get some vacuum. (below ground temps are almost always very consistent about 50 deg F). So if you fill up, park it, as the gas chills down from 50 to ambient (say 20), it will suck oil through a cracked... fuel pump?
why it is ending up on the ground, no idea.
Usually gas will mix with oil pretty well and you couldn't ID the two separately. I'll give ya that this might be happening, but it sounds like a pink zebra. Have you eliminated the standard horses already, not leaking oil elsewhere, hole in the fuel neck, etc - all the horses and mules?
Gas expands when it warms up. In the summer you get some "barfing" if you top it off to the very top, in the winter up north I would think instead you get some vacuum. (below ground temps are almost always very consistent about 50 deg F). So if you fill up, park it, as the gas chills down from 50 to ambient (say 20), it will suck oil through a cracked... fuel pump?
why it is ending up on the ground, no idea.
Usually gas will mix with oil pretty well and you couldn't ID the two separately. I'll give ya that this might be happening, but it sounds like a pink zebra. Have you eliminated the standard horses already, not leaking oil elsewhere, hole in the fuel neck, etc - all the horses and mules?
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Cargo Master
Joined: Aug 2008
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It was about 65 today, a major improvement over our normal 12 degrees this time of year. I filled up at night, the gas coming out the next day is nothing new, happens with such temp swings.
I haven't checked anything really out yet, I was needing to be somewhere else at the time, but its oil. Least that helps explain how it could have sucked down in there.
I'll have to get pictures, this is pretty crazy, especially in just a say so lol
I haven't checked anything really out yet, I was needing to be somewhere else at the time, but its oil. Least that helps explain how it could have sucked down in there.
I'll have to get pictures, this is pretty crazy, especially in just a say so lol
Lead Driver
Joined: Apr 2002
Posts: 8,813
Likes: 13
From: Littleton, New Hampshire
Had a truck years ago that started fine and would run about 30 minutes and then would die like you turned off the key. If I let it sit for about 15 minutes it would start and run again for another 30 minutes or so. It turned out to be a coil with an internal short. It would heat up and short out after about 30 minutes of driving but when it cooled down it was okay until it heated up again. 
Laughing Gas
Joined: Jun 2011
Posts: 1,041
Likes: 53
From: Sterling CO
Ballpoint pen in the gastank.... somehow came all apart and the hollow case pulled into the fuel line, causing a massive (but not complete) restriction. Granted in itself it is not weird but the behavior was. Vehicle would start and run ok, but about a mile down the road it would sputter and struggle, pull over and it would smooth out, back on the road it would struggle again. I was but a wee 12yr old back then and this was school econoline van, took the mechanics 3 hours to find it.
Fleet Owner
Joined: Jul 2004
Posts: 27,291
Likes: 1,055
From: NM
Had a truck years ago that started fine and would run about 30 minutes and then would die like you turned off the key. If I let it sit for about 15 minutes it would start and run again for another 30 minutes or so. It turned out to be a coil with an internal short. It would heat up and short out after about 30 minutes of driving but when it cooled down it was okay until it heated up again.
I had an '86 Chrysler Lebaron GTS, 2.2 turbo 5-sp that was a great car. It ran great for over a year in normal day-to-day service. But I used to make trips up to Ft Collins CO, about 550 miles up I-25, a couple times a year. Every time I did, the car would run fine until I got into downtown Denver (about 6 hours) then would start to stutter and die -- right in the middle of the worst traffic on the trip, usually about rush hour. It only happened after a long period of driving, then slowing to stop-n-go, in the summer. I could never get it to happen any other way. But then one day it happened around town, on a hot day when the A/C was on, and the A/C clutch had started slipping. I touched the A/C clutch, it was smokin' hot. I noticed that the ignition coil was only about 3" - 4" away from it. I felt it, and it was nearly as hot. So I also replaced the ignition coil, and moved it away from the clutch. Next long trip, no problems.
What was apparently happening was that I'd leave early in the mornings when it was cool, but by the time I got to Denver, I needed the A/C. When I got into traffic, the A/C coil would overheat the ignition coil, and it would intermittently short out.
Roast em' if you got 'em
Joined: Mar 2005
Posts: 21,989
Likes: 9,853
From: Rio Rancho, NM
Years ago dad had an old John Deer windrower and about 30 acres of alfalfa. I'd fire the windrower up and it would run great until you got to the farthest point from the house then it would sputter and die like it was running out of gas. You'd climb off of it and tinker with things, tap the carb, etc and it would fire back up and run great until you once again got to the farthest point from the house (and toolbox) then it would again die.
I got to noticing that this only occured when the gas tank was low (1/4 tank or below) after messing with it for a couple of months I finally found the problem. It was a dead wasp floating in the fuel tank. When the tank got low it would get sucked up into the fuel pick up tube and kill the engine. After the engine died there would be no suction on the line and the wasp would float back out and the windrower would run great until it found its way back.
It took several six-packs over a couple of months to figure that one out.
Bobby
I got to noticing that this only occured when the gas tank was low (1/4 tank or below) after messing with it for a couple of months I finally found the problem. It was a dead wasp floating in the fuel tank. When the tank got low it would get sucked up into the fuel pick up tube and kill the engine. After the engine died there would be no suction on the line and the wasp would float back out and the windrower would run great until it found its way back.
It took several six-packs over a couple of months to figure that one out.
Bobby