spark plug question

[331 stang91]

I changed my plugs and noticed some of them were wet. Would this be probably oil blow-by or could it have been fuel that didn't burn off? The motor has 98000 on it.

 

[bill302]

run a compression test and post results....click on links below for good info on compression testing...
http://www.pumaracing.co.uk/comp.htm
http://www.risaa.org/newsletter/0506/0506_12.pdf

 

[331 stang91]

Thanks I'm going to get the tester this weekend and do the test sometime next week. Any thoughts without having the test results? I was thinking it was most likely oil but hoping it might be a couple drops of fuel or is that just wishfull thinking?

 

[go-stang5.0]

Well was it black? Did it smell like fuel? That could give you a preliminary indication. How long did you wait to pull the plugs after running the car. Gasoline would evaporate pretty quickly in a hot combustion chamber.

The only time I have seen a car with fuel soaked plugs is when it cranks but doesnt start (and the fuel system is working) and you pull a plug shortly there after.

 

[94-302-vert]

Well was it black? Did it smell like fuel? That could give you a preliminary indication. How long did you wait to pull the plugs after running the car. Gasoline would evaporate pretty quickly in a hot combustion chamber.

The only time I have seen a car with fuel soaked plugs is when it cranks but doesnt start (and the fuel system is working) and you pull a plug shortly there after.

 

[331 stang91]

ya it would be oil then I guess I was just hoping it wasn't. The plugs did smell of fuel and the liquid was very clear but the oil is pretty clean. But I did have the car off for about an 1/2 hour or so so I guess the fuel would have evaporated. Thanks for the responses