Misfire/Smoke
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Tuned
Joined: Nov 2007
Posts: 370
Likes: 3
From: SoCal
Misfire/Smoke
Had some trouble with the Excursion 7.3 yesterday morning. IDK if relevant or not - but wife was driving and she pushed it kinda hard while still somewhat cold (she argues it wasnt cold )...Started smelling like really burnt onions - looked at the tailpipe through rear view and saw white-ish smoke. Came to a near-stop and now it has a misfire and oil dripping from the crank case vent hose. It was driving roughly 2 miles before the problem occurred. Ex has 177k on ODO. Doing some reading - sounds like injectors or o-rings - but not sure. No codes and I don't have an AE.
Strange thing is the day before this problem happened, I got a weird glow plug code...it started and ran fine though. Is it even remotely possible or likely that a GP tip fell off into the head/cylinder and got "processed" ? If an injector or injector o ring did fail, is that why I am getting oil out the CCV drain (the oil is coming up past the injector) Any other ideas?
Strange thing is the day before this problem happened, I got a weird glow plug code...it started and ran fine though. Is it even remotely possible or likely that a GP tip fell off into the head/cylinder and got "processed" ? If an injector or injector o ring did fail, is that why I am getting oil out the CCV drain (the oil is coming up past the injector) Any other ideas?
Postmaster
Joined: Apr 2012
Posts: 2,613
Likes: 8
From: North Georgia
Had some trouble with the Excursion 7.3 yesterday morning. IDK if relevant or not - but wife was driving and she pushed it kinda hard while still somewhat cold (she argues it wasnt cold )...Started smelling like really burnt onions - looked at the tailpipe through rear view and saw white-ish smoke. Came to a near-stop and now it has a misfire and oil dripping from the crank case vent hose. It was driving roughly 2 miles before the problem occurred. Ex has 177k on ODO. Doing some reading - sounds like injectors or o-rings - but not sure. No codes and I don't have an AE.
Strange thing is the day before this problem happened, I got a weird glow plug code...it started and ran fine though. Is it even remotely possible or likely that a GP tip fell off into the head/cylinder and got "processed" ? If an injector or injector o ring did fail, is that why I am getting oil out the CCV drain (the oil is coming up past the injector) Any other ideas?
Strange thing is the day before this problem happened, I got a weird glow plug code...it started and ran fine though. Is it even remotely possible or likely that a GP tip fell off into the head/cylinder and got "processed" ? If an injector or injector o ring did fail, is that why I am getting oil out the CCV drain (the oil is coming up past the injector) Any other ideas?
If it blows it off (vertically, not the horizontal push from the fan...) then that is a sign of excessive "blowby". Loosing a glow plug tip can take out rings, which will absolutely affect compression. Best bet would be to pull and inspect all your glow plugs. If in doubt... replace them. Do not use autolite glow plugs. Use motorcraft.
Next step would be compression test if everything else looks ok... but to know that... you need to be able to buzz test, check perdels, and run a cylinder contribution test.
Postmaster
Joined: Jun 2014
Posts: 3,206
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From: Oakhust NJ Jersey Shore
Did you check the oil? Is the engine making oil? Meaning is the oil overfull, excess blowby is never a good sign, did ya check the valve cover harness? were the harness comes out of the valve cover they chaff on the spider and head, could cause an injector to dump fuel, which would wash the rings, You can unplug the harness were it goes into the head, the big terminals are the glowplugs, OHM them out, ground one lead of you OHM meter and touch the big terminals, there are 4 of course be careful not to force anything and on a cold engine you should have about .04 OHM's, If one is open or OL you could have a problem, but lets hope not. Take the easy stuff first and then go from there.
Postmaster
Joined: Apr 2012
Posts: 2,613
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From: North Georgia
Did you check the oil? Is the engine making oil? Meaning is the oil overfull, excess blowby is never a good sign, did ya check the valve cover harness? were the harness comes out of the valve cover they chaff on the spider and head, could cause an injector to dump fuel, which would wash the rings, You can unplug the harness were it goes into the head, the big terminals are the glowplugs, OHM them out, ground one lead of you OHM meter and touch the big terminals, there are 4 of course be careful not to force anything and on a cold engine you should have about .04 OHM's, If one is open or OL you could have a problem, but lets hope not. Take the easy stuff first and then go from there.
I'd be real interested to see how a dead short to the block would/could energize an injector solenoid...
Beyond that...
How in the holy rats**t do you suggest an injector problem would cause excessive crankcase pressure... and excessive oil misting(dripping from ccv)?
I have never even heard of a 7.3 injector getting stuck open. Thats some kinda newfangled craziness right there.
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Tuned
Joined: Nov 2007
Posts: 370
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From: SoCal
I will check the wires and remove the valve covers.
Here is a quick video of the motor running. Managed to fill my garage with smoke right away.
http://s80.photobucket.com/user/phuqfase/media/Excursion/20140805_193434_zps9vhhldbp.mp4.html
Here is a quick video of the motor running. Managed to fill my garage with smoke right away.
http://s80.photobucket.com/user/phuqfase/media/Excursion/20140805_193434_zps9vhhldbp.mp4.html
Laughing Gas
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Thread Starter
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Tuned
Joined: Nov 2007
Posts: 370
Likes: 3
From: SoCal
Ya - CCV mod is done. I didn't notice any blockage - but can have a look.
Postmaster
Joined: Apr 2012
Posts: 2,613
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From: North Georgia
Wish there was better news, but i would start planning for a rebuild or find a swapper to go in its place. The longer they run in a compromised condition... the higher the chances get of catastrophic failure, so keep in your mind the clock is ticking.
If it is only cylinder damage... it can be fixed. Can always punch it all the way out and sleeve it.
