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#1
03-23-2010, 09:46 AM
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PO- Misfire #4 Oil in plug hole
I got a miss on my 97 CV and when I pulled the plug it had alot of oil present. Other plugs I pulled did not. Indication of bad head gasket? Piston Rings? I changed the manifold a couple of years ago. Engine has about 70k original miles---where to start?
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#2
03-23-2010, 12:43 PM
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Re: PO- Misfire #4 Oil in plug hole
I'd guess valve seals.
__________________
 2000 Mercury Grand Marquis LS - 119k / 14.89s @ 92.11MPH [ pictures | videos ] > Dual Flowmaster Delta 40s / J-Mod / PI Intake Manifold & Cams / Marauder Air Box & 80mm MAF / 3.55 Trac-Lok > Bumper Tuck / Steeda UD Pulleys / CVPI Zip Tube / Ported & Polished Plenum / BBK 70mm TB > BOC 93 Octane Tune / Headlight Relay Upgrade / 17mm rear stabilizer bar / Heinous Aluminum Billet Rear Control Arms > CVPI aluminum driveshaft
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#3
03-23-2010, 06:58 PM
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Re: PO- Misfire #4 Oil in plug hole
Was the oil on the threads or on the plug electrodes? Makes a lot of difference. If it is on the electrode, possibly valve seals as Blue stated. If it is on threads, look for valve cover leak.
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