My truck is dead

[ISFast]

I still say put a stick on the throttle and walk away!!!

 

[RaptorWifey]

Joe wants to know how the fuel got in the oil?
Please answer in enginerd so he stops asking me these questions I can't answer....two more hours to drive...

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[pirate air]

Injectors flood the cylinder beyond stoichiometric, or to the point you won't have a clean burn in the cylinder and/or it won't fire at all. What raw fuel that doesn't turn into vapor (and eventually lead to catalytic converter failure) will reach the piston and leaks past the piston rings into the crank case.

IF Greg's foaming is due to a rich mixture resulting in fuel leaking past the rings I speculate its something that's been happening slowly over sometime, not just from this one single event.

 

[RaptorWifey]

Thanks PA...

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[WorldTour]

in non-enginerd... when a running engine floods it "washes" the cylinder walls of lubricant and since it has way less viscosity than the oil it's washing away it can bypass the piston rings... especially on a cold engine since the heat expansion is still taking effect. I'm sure there are additional ways that a good tech can explain better than I.
Mark


Edit: PA for the win!

 

[Squatting Dog]

Injectors flood the cylinder beyond stoichiometric, or to the point you won't have a clean burn in the cylinder and/or it won't fire at all. What raw fuel that doesn't turn into vapor (and eventually lead to catalytic converter failure) will reach the piston and leaks past the piston rings into the crank case.

yeah.. basically the computer was enriching the fuel to warm the engine (it thought it was still 40 degrees) but it was actually 70 degrees (less dense air) causing basically washing the cylinder walls with unburned fuel because the fuel/air mixture was too rich to burn. The O2 sensors were going trying to correct the over rich condition by adjusting spark advance/timing(or something like that) which caused even more fuel to be unburned and into the cylinders because I was flooring it to get to 1000 rpms and move the truck off the road.. so the ecm said and killed the truck.. allowing the unburned fuel to drain into the pan.. By panic starting it and bouncing the throttle to get her to move I made the problem worse and foaming the oil..

 

[pirate air]

yeah.. basically the computer was enriching the fuel to warm the engine (it thought it was still 40 degrees) but it was actually 70 degrees (less dense air) causing basically washing the cylinder walls with unburned fuel because the fuel/air mixture was too rich to burn. The O2 sensors were going trying to correct the over rich condition by adjusting spark advance/timing(or something like that) which caused even more fuel to be unburned and into the cylinders because I was flooring it to get to 1000 rpms and move the truck off the road.. so the ecm said and killed the truck.. allowing the unburned fuel to drain into the pan.. By panic starting it and bouncing the throttle to get her to move I made the problem worse and foaming the oil..

Yeah I think (well.. more like know) even the stock programming has issues with temp swings. It was 20 something degrees when I parked my truck at work this morning, when I left work it was almost 70 degrees out. It idles like shit for a few seconds and always has after a temp swing. From what I know the new ones are the same. I'm sure the tunes just escalate the problem. You getting your oil tested? At this point I would.

 

[PropDr]

Injectors flood the cylinder beyond stoichiometric, or to the point you won't have a clean burn in the cylinder and/or it won't fire at all. What raw fuel that doesn't turn into vapor (and eventually lead to catalytic converter failure) will reach the piston and leaks past the piston rings into the crank case.

IF Greg's foaming is due to a rich mixture resulting in fuel leaking past the rings I speculate its something that's been happening slowly over sometime, not just from this one single event.

Fuel dilution is a problem found in diesel engines running excessively rich.
If a gasoline engine encounters fuel dilution to the point that the fluid level in the crank case increases it will have the cylinder walls washed clean of lubrication and you need a major overhaul.
And that quantity of gasoline in oil will not evaporate for days (Take a quart of gasoline in an open can and set it outside, how long does it take to disappear)
Also, if you would dump that quantity of fuel in to the combustion chambers you would have backfires of the kind that separates the exhaust from the headers and considering the short time you drove the truck the injectors can not flow that quantity of fuel.

 

[Squatting Dog]

Fuel dilution is a problem found in diesel engines running excessively rich.
If a gasoline engine encounters fuel dilution to the point that the fluid level in the crank case increases it will have the cylinder walls washed clean of lubrication and you need a major overhaul.
And that quantity of gasoline in oil will not evaporate for days (Take a quart of gasoline in an open can and set it outside, how long does it take to disappear)
Also, if you would dump that quantity of fuel in to the combustion chambers you would have backfires of the kind that separates the exhaust from the headers and considering the short time you drove the truck the injectors can not flow that quantity of fuel.

it was a short time, but panicking i was mashing the throttle to keep rpms up enough to move the truck safely off the road. So wide open throttle for good 15 minutes. Several failed attempts to restart. I am sure there was enough fuel to raise level high enough to be whipped up by crank.
As far as disappearing excess fuel... I think the 3 hours sitting(allowing separation) then being started and test driven, then left idling took care of the extra quart or so of fuel.. Which first tech reported slight high but in safe range.. Then it was left idling again, test driven (total of 50 miles) and fluid levels reported as normal.



-Greg

 

[Ni9mm]

So in retrospect let your engine warm up and your ecm adjust to wild swings in ambient temps before driving around town like a mad banshee ?

After reading this thread people are gonna think I actually know what the Hell I'm talking about when I explain to them how they flooded their car.