liljojo4711

i got a ses light today and the car was sputtering so i went to autozone and get the code read. i figured it was a misfire, it was #8. so i got a coil. i have some spark plugs at home so i didnt get any of those. anyway, i changed the plug and when i took it out it was covered in oil. i mean soaked. that mean there is a leak somewhere? i didnt change the coil, just put the old coil back on to see if that would fix it, it didnt. so tomorrow i will put the new coil on. any suggestions or reasons for the oil being all over the plug? could that be causing the misfire?

HateWhatOwnsYou

if there is oil on your plug, either your rings are leaking or your valve seals are

nkguillen1

That's definitely causeing your misfire, but is there anything on the car that may have required a custom tune?

liljojo4711

all i have is a cia done to the engine, so no tune required lol. im guessing the seals are not an easy fix...

Lowtryx

Not particularly.. The next step, provided the correct answer is either the Valve seals or Rings (Which I agree with) would be a relative compression/compression test.
This will allow you to either rule out Rings or pinpoint the cylinder(s) leaking.

liljojo4711

how much does that cost?

Lowtryx

Well, depending on who you know, nothing or not much

If you can get an IDS or any kind of OBDII Style tuning/diagnostic program, you can easily complete this. At work (Ford Dealer) I was able to complete the Relative Compression test in less than 2 mins (Including time to walk to the car lol )

If not, see if you can't simply find a Tech, talk to him and ask him or her to possible perform the Rel. test for little to no cost.

The Individual cylinder compression test is a bit more involving and difficult, and will honestly give you basically the same result as the relative compression test, so I would advise going the route of relative test.