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| Weird Happenings Lately http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=26587 |
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| Author: | Cowcatcher [ Thu Nov 15, 2007 3:21 pm ] |
| Post subject: | Weird Happenings Lately |
Earlier this week I started up the tractor baked up a slight slope where I park and turned into a SW alignment to let it warm a bit and let the sun hit the frost on the windshield. During the end of the manuever it started running rough then died. I started it up and the same thing. On the third try it ran fine. NO CODES! Ambient temp around 34F and no fuel heater active. I have had colder days before and since. I started down the road and about 6 miles later, traveling at 57 MPH in 5th OD locked, I suddenly unlocked. This morning, at about the same location my OD disengaged all by itself. None of these things seem related but they have all occured in a matter of 4 days. Is it Zen or a real problem? |
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| Author: | Bill.Barg [ Thu Nov 15, 2007 4:05 pm ] |
| Post subject: | |
Dave, I was reading through the owners manual today and was surprised that it mentioned a relationship between tranny temp and engangement of the OD. It might be that it takes 6 miles before the tranny computer figures it is cold enough to disable the OD function (like cold fluid from the pan, finally making it to where the sensor picks it up?) B |
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| Author: | DarbyWalters [ Thu Nov 15, 2007 4:29 pm ] |
| Post subject: | |
What he said |
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| Author: | DarbyWalters [ Thu Nov 15, 2007 4:29 pm ] |
| Post subject: | |
What he said |
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| Author: | GilaMonster [ Thu Nov 15, 2007 4:56 pm ] |
| Post subject: | |
What he said he said. |
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| Author: | chrispitude [ Thu Nov 15, 2007 6:41 pm ] |
| Post subject: | |
That's what she said. |
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| Author: | Cowcatcher [ Thu Nov 15, 2007 7:28 pm ] |
| Post subject: | |
Whaddidhesay? 
So, I know it takes temp to allow the OD to kick in, about 2 miles on a cold day, but how does that account for it kicking back out 4 miles later? Are we talking like a thermostat where it heats part of it up before it opens to a new area and then that rush of new, cold fluid cools everthing down to below that point and it shifts out again? It was also in the mid forties when this happened today. |
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| Author: | gmctd [ Fri Nov 16, 2007 11:23 am ] |
| Post subject: | |
The emissions system has two tasks - make sure the engine is hot enough to burn all the ingested fuel, so it doesn't emit unburned hydrocarbons, and make sure the engine is not too hot, so it doesn't emit oxides of noxious. If you look in the dictionary under oxymoron, that's a picture of your intelligent emissions system. ECM determines suitability of emissions emission by monitoring AAT, IAT, ECT, transmission temperature, and engine rpm in order to maintain engine operation within a range designed to promote lowest pollution, while still allowing the vehicle to proceed in a timely manner - the engineers are stuck between a rock and a hard place because traffic speeds with cold engine is excessive unburned hydrocarbon emissions, but idle is even worst emissions level and zero fuel economy, to boot. That, and the thought of millions of irate soccer-moms returning 'instantly undriveable' vehicles for full refund, is why you get what you got ECM will always take the hardest path to emissions nirvana, driveability and customer satisfaction notwithstanding. Either that, or it's gremlins.......................... |
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| Author: | Pablo [ Sun Nov 18, 2007 3:18 pm ] |
| Post subject: | |
Maybe a silly idea, but if it stopped running in park shortly after start up just maybe you have a little water in the fuel filter or it is a tad loose? It maybe freezing up that water and constricting flow, then the water melts and all is fine (or it heats up the fuel filter, it expands and seats tighter stopping an air leak). Others here (oldnavy) have noted that the water in fuel sensor was not very reliable. |
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| Author: | Cowcatcher [ Sun Nov 18, 2007 7:39 pm ] |
| Post subject: | |
Pablo wrote: Maybe a silly idea, but if it stopped running in park shortly after start up just maybe you have a little water in the fuel filter or it is a tad loose? It maybe freezing up that water and constricting flow, then the water melts and all is fine (or it heats up the fuel filter, it expands and seats tighter stopping an air leak). Others here (oldnavy) have noted that the water in fuel sensor was not very reliable.
Hummmm, a possibility. Not sure it got to freezing that night but it might have. There had been colder nights prior with no problem. Perhaps it is time to plug the heater back in for the winter. |
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