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Misfires and oil leak

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  #1  
Old 12-29-2017, 10:54 AM
cmayer
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Misfires and oil leak

Ex threw a check engine light while towing up a grade and began idling very rough.

P0304, P0305, P0309 = misfires cylinders 4, 5, 9.

Also the PVC valve and driver's side valve cover have oil on them which they didn't before, but even worse is the passenger side from the starter to the bell housing have a ton of oil on them, enough to splatter back all over the transmission, cross members, and even rear axle has splatter marks.

Figure I'll get a new COP and try swapping it with the misfiring cylinders, but any clue as to why it puked oil and could that amount of oil on the passenger side migrated from the PVC?

Originally thought it spat a plug, but they're all still in place.

Thanks!
 
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Old 12-29-2017, 11:07 AM
super 6.8
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Sounds like your crank case got pressurized some how. Maybe the pcv valve is stuck closed?
 
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Old 12-29-2017, 11:39 AM
R&T Babich
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Originally Posted by cmayer View Post
... Figure I'll get a new COP and try swapping it with the misfiring cylinders, ...
With oil all over that's probably causing your misfires.
Cleaning the plug holes and boots might fix the misfiring.
A spare COP is still good to have.
 
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Old 01-08-2018, 09:27 AM
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Cylinder 9 is on wrong side of motor. It' on drivers side. Is there oil over there?

I think you had a PCV issue which could have blown out a valve cover gasket. But I would think the pcv would have popped out first.

I bet at least 2 plug holes have alot of oil in them. Clean it out and clean cops, put in a new oem pcv and hoses. New plug and oem Denso cop on cylinder 9.
 
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Old 01-15-2018, 04:49 PM
cmayer
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Originally Posted by rock2610d View Post
Cylinder 9 is on wrong side of motor. It' on drivers side. Is there oil over there?

I think you had a PCV issue which could have blown out a valve cover gasket. But I would think the pcv would have popped out first.

I bet at least 2 plug holes have alot of oil in them. Clean it out and clean cops, put in a new oem pcv and hoses. New plug and oem Denso cop on cylinder 9.
Thanks, cleaned the oil around the PVC and found the washer around the oil pan drain plug is split and allowing a drip while sitting. I'm assuming that's the cause of the oil on the bottom of the engine.

#9 COP doesn't lock on when plugged in, so when pushed on the idle smooths out a bit. Appears to be the clip on the COP is broke, so ordered a new one and should fix that.

#'s 4 and 5 made no difference whether the COP was plugged in or not, so ordered two new ones with boots and springs.

Using the recommended Denso COPs.
 
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Old 01-23-2018, 03:42 PM
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One shop is claiming misfiring in all cylinders under load and 0 compression in 4 and 6. Recommends engine replacement.

Going to take it to another shop for a second opinion. First said about 10k for a engine with 3 years / 100k warranty.
 
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Old 01-28-2018, 02:09 PM
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Originally Posted by cmayer View Post
One shop is claiming misfiring in all cylinders under load and 0 compression in 4 and 6. Recommends engine replacement.

Going to take it to another shop for a second opinion. First said about 10k for a engine with 3 years / 100k warranty.
How did it go?
 
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Old 01-28-2018, 02:51 PM
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Originally Posted by hitekhomeless View Post
How did it go?
Second shop confirmed low compression in 4, 5, 6 and 9 with misfires in those cylinders.

Just putting a reman engine from Jasper into it.

Sucks, but is what it is .
 
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Old 01-28-2018, 03:43 PM
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That does suck, but at least you'll have a new motor. How much is it going to cost?
 
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Old 01-28-2018, 04:31 PM
cmayer
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Originally Posted by hitekhomeless View Post
That does suck, but at least you'll have a new motor. How much is it going to cost?
8k with install and replacement of all wear items that are easily reached with the engine out.
 
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