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Posted on Jan 02, 2017
SOURCE: I have a 1999 oldsmobile
fuel pressure regulator on the fuel rail is probably it or the egr valve is stuck open allowing burnt fuel to flood the intake, im leaning towards the fuel pressure regulator because the o2sensor is probably reading rich or if its reading lean then i would choose the egr valve . good luck
Posted on Aug 26, 2008
i also have the same problem regarding the oil leak. this is due to the spark plug gasket leaking and you will need to replace them. they are circular gaskets about 1.5 inches across that fit to the underside of the rocker covers and prevent oil from seeping down the long spark plug hole. when i investigated my leak i assumed it was just the rocker cover gasket that was leaking but once everything was removed it is obvious.
Posted on Jan 12, 2009
O2 sensors indicate unburned oxygen in the exhaust sysytem. Bad O2 sensors causes fuel mixture to run rich. It causes fuel consumption and your emmissions test will not pass. Check for vacuum leaks check the manifold.check for a misfiring cylinder, a burned exhaust valve that is leaking compression. replace the O2 sensor or sensors. Some cars have 2 . One for the intake another for the out take. If it reads a code for the Map sensor along with the O2. It is better ifyou replace both sensors. But I think that the problem lies in the oxygen sensor or sensors. Pleae vote my answer if this helps.
Posted on Jan 15, 2009
SOURCE: misfire in cylinder 3
NO to the MAF Sensor Question, and Spark Plug Wires Or BOOT Will Cause Missfire. As For Mass Air Flow Sensor Easy Check is to Dissconnect it While Engine is Running And If ENGINE SMOOTHES OUT The Sensor is Bad
Posted on Jul 30, 2009
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