Help with bad cylinder!!
It could be oil seals, valve stem seals, head gasket....there are many things that can cause this. One thing is for sure, oil in the combustion chamber can lower the detonation threshold greatly causing detonation(if the plug is not fouled out first). So be careful....if you run the car hard with oil in the mixture, you can do damage from detonation, especially if the engine is tuned for max power(ignition timing and leaner AFR's).
Also, deposits on your bumper are totally normal if you are not running a cat. This is carbon deposits from unburnt fuel from running rich and not having a cat to burn up the excess hydrocarbons. Also, a puff of DARK smoke at WOT is normal too, as this again, is unburnt fuel. If you car is smoking white or white/blueish smoke, that is oil.
You should take a pic of the plug in question. I would like to see it's state. A fouled plug from excessive rich AFR's or too cold of a heat range with will look black and nasty. Some people mistake this for oil fouling.
If it is indeed oil, a leak down test need to happen and if that comes back positive, you will need to pull the head at the least.
Hell, if it's a bad ring or worse, you might as well swap out the pistons and rods/rod bolts with some forged pistons and billet rods and ARP rod bolts, while you have the head off(as long as the bore is in good shape and there is no scaring). It would be easy to do once the head is off, all you gotta go is drop the oil pan to expose the bottom of the rotating assembly(well, it's a little more in depth than that, but most of the work is done from that point on).
CJ
Also, deposits on your bumper are totally normal if you are not running a cat. This is carbon deposits from unburnt fuel from running rich and not having a cat to burn up the excess hydrocarbons. Also, a puff of DARK smoke at WOT is normal too, as this again, is unburnt fuel. If you car is smoking white or white/blueish smoke, that is oil.
You should take a pic of the plug in question. I would like to see it's state. A fouled plug from excessive rich AFR's or too cold of a heat range with will look black and nasty. Some people mistake this for oil fouling.
If it is indeed oil, a leak down test need to happen and if that comes back positive, you will need to pull the head at the least.
Hell, if it's a bad ring or worse, you might as well swap out the pistons and rods/rod bolts with some forged pistons and billet rods and ARP rod bolts, while you have the head off(as long as the bore is in good shape and there is no scaring). It would be easy to do once the head is off, all you gotta go is drop the oil pan to expose the bottom of the rotating assembly(well, it's a little more in depth than that, but most of the work is done from that point on).
CJ
Last edited by iTune; Mar 5, 2007 at 08:22 PM.
It could be oil seals, valve stem seals, head gasket....there are many things that can cause this. One thing is for sure, oil in the combustion chamber can lower the detonation threshold greatly causing detonation(if the plug is not fouled out first). So be careful....if you run the car hard with oil in the mixture, you can do damage from detonation, especially if the engine is tuned for max power(ignition timing and leaner AFR's).
Also, deposits on your bumper are totally normal if you are not running a cat. This is carbon deposits from unburnt fuel from running rich and not having a cat to burn up the excess hydrocarbons. Also, a puff of DARK smoke at WOT is normal too, as this again, is unburnt fuel. If you car is smoking white or white/blueish smoke, that is oil.
You should take a pic of the plug in question. I would like to see it's state. A fouled plug from excessive rich AFR's or too cold of a heat range with will look black and nasty. Some people mistake this for oil fouling.
If it is indeed oil, a leak down test need to happen and if that comes back positive, you will need to pull the head at the least.
Hell, if it's a bad ring or worse, you might as well swap out the pistons and rods/rod bolts with some forged pistons and billet rods and ARP rod bolts, while you have the head off. It would be easy to do once the head is off, all you gotta go is drop the oil pan to expose the bottom of the rotating assembly(well, it's a little more in depth than that, but most of the work is done from that point on).
CJ
Also, deposits on your bumper are totally normal if you are not running a cat. This is carbon deposits from unburnt fuel from running rich and not having a cat to burn up the excess hydrocarbons. Also, a puff of DARK smoke at WOT is normal too, as this again, is unburnt fuel. If you car is smoking white or white/blueish smoke, that is oil.
You should take a pic of the plug in question. I would like to see it's state. A fouled plug from excessive rich AFR's or too cold of a heat range with will look black and nasty. Some people mistake this for oil fouling.
If it is indeed oil, a leak down test need to happen and if that comes back positive, you will need to pull the head at the least.
Hell, if it's a bad ring or worse, you might as well swap out the pistons and rods/rod bolts with some forged pistons and billet rods and ARP rod bolts, while you have the head off. It would be easy to do once the head is off, all you gotta go is drop the oil pan to expose the bottom of the rotating assembly(well, it's a little more in depth than that, but most of the work is done from that point on).
CJ
I will take a picture of the plug tomorrow. The plugs are NKG 7iridium heat range. The car smokes black at WOT, not a blueish white. Also smells like gas, not a burnt oil smell.
(Will synthetic oil burning smell like Dino oil when burning?)
Thanks
An oily plug can sometimes be confused with a wet plug, a wet plug will be smooth, where as an oily plug will have small deposits on it
CJ
Last edited by iTune; Mar 5, 2007 at 09:40 PM.
if it's actually wet, get some on your fingers and rub them together, see if it's slippery. if they're being fouled with gas, maybe you have a bad coil that's not firing the plug.
EDIT-wait, bottom of which pic?? The bottom of the top pic or the bottom pic with the plug that is alone?
CJ
Sorry, i could of done a better job in explaining the pics. The top pic with the three plugs shows what a plug looks like going from a wet fouled plug(due to overly rich AFR's or too cold of a heat range) to a plug experiencing pre-ignition and detonation. The bottom pic with the lone nasty plug with the black deposits on it is a oil fouled plug. The wet fouled plug is smooth and shiny, but black...the oil fouled plug is nasty and looks like it has dirt all in it..
Which one does your plug look like?
CJ
Which one does your plug look like?
CJ
