2007 Saturn Ion 2 emissions light stays on. Code showed up Misfire on Cylinder 3. Using twice amount of gas. Emission light flashes occasionally and goes off occasionally. Have replaced plug and coil for cylinder 3. Replaced upstream oxygen sensor. Has Plug and coil for cylinder 3 replaced. Upstream oxygen sensor replaced. Has not helped. What to do next.
Saturday, November 5th, 2011 AT 4:04 PM