Question about Subaru Impreza

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My 1999 Subaru Impreza sport wagon had a misfire in cylinder 2, after I changed all four spark plugs and fuel filter the problem got worse. Now the throttle lags and misfires only happen when the car accellerates from 0 to 20, then the problem disappears. When I was changing the spark plugs, there was also oil completely coating the outside of the rubber gaskets that plug over the spark plug, is this due to a cracked valve cover gasket?

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Check the firing order tu might have installed it differently, clean the Hi-TENSiON wire terminals on the distributor cap and to spark plugs, oxidation makes contacts to these points might have attributed to the problem! The oil must have leaked from the o-ring seals around the TUBE where u put the spark plugs! It also makes the spark plugs misfires! Replacing these o-ring seals, u have to pull down the valve cover, u will see the rubber around the tube, pull it off and replace w/ new one, clean the area first and put a little silicone sealant! Put everything back! Thats it! Taaah!

Posted on Nov 12, 2010

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