Fouled a plug??

bigolsen · Sep 19, 2008

Ok I've been having issues which I thought were caused by my bov blowing open. Did the dgm to the bov and it seemed to get worse??? At first it was feeling and sounding like the bov was fluttering at around 23 psi (t28 boost spike) and the car would kinda stutter untill boost dropped some.

Well the problem got worse to the point that it started feeling like a miss, or misfire (doing it at as little as 17psi). So I start checking my plugs and when I get to #1 it is soaked in oil. Freaking out thinking I burned a piston or something I hurry and do a compression check. Compression is good. Same in #1 as #4. So I clean and regap all the plugs. Take the car out and run it hard, and it is running damn good now. I think the plug may have been slowly fouling and getting worse over the last week or so, but after running the car hard I come home and check the plug again and it's bone dry. NO OIL....

Should I be concerned? The car has close to 100k on it and I don't think the motors been touched other than reg maint, and t-belt. Still runs great!

Redmaster89 · Sep 19, 2008

What were your compression numbers?

Oil on the spark plugs could be caused by bad valve stem seals.

-Colton-

bigolsen · Sep 19, 2008

Redmaster89 said:
What were your compression numbers?

Oil on the spark plugs could be caused by bad valve stem seals.

-Colton-

I only checked number 1 and 4 which were both at 140 psi at 4700ft above sea level so should equal around 170ish.

Redmaster89 · Sep 19, 2008

I think your best bet at this point would be to do a leakdown test, again I would suspect your valve stem seals are bad.

What part of Idaho are you from?

-Colton-

bigolsen · Sep 19, 2008

Redmaster89 said:
I think your best bet at this point would be to do a leakdown test, again I would suspect your valve stem seals are bad.

What part of Idaho are you from?

-Colton-

I was afraid of that. I will be changing out cams next week but don't feel up to changing the seals yet especially since it requires a 200 dollar tool if you don't pull the head. Oh well if it acts up again I guess I'll know what to check first.

I'm in Idaho Falls. You must be northern Idaho.

Thanks.

Redmaster89 · Sep 19, 2008

Pocatello actually, I just happen to be going to school in Portland most of the year.

-Colton-

Hotmodder3 · Oct 27, 2008

It could also be from leaking seals that go on the valve cover leaking down into your spark plug hole.

93_GSX · Oct 27, 2008

Was it oil that you found the plug "soaked" in, actual liquid oil, or was it carbon? Most fouled plugs I've seen are caked in carbon, not oil. Both look black, though, which is why I'm asking....

spyder79 · Oct 28, 2008

Bigolsen, I to get that fluttering sound that you are describing with my T28. You ever figure out what that was? I have checked everything and still don't know where it is coming from.

bigolsen · Oct 28, 2008

spyder79 said:
Bigolsen, I to get that fluttering sound that you are describing with my T28. You ever figure out what that was? I have checked everything and still don't know where it is coming from.

After changing plugs and Bov I haven't had the problem. I think it was mainly my old plugs because I was running really rich for so long before I had an afpr.

Fouled a plug??

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