Question about 2007 Saturn ION-2 Quad Coupe
My 2007 ion has 45,000 miles on it. Lately it seems like the engine is surging up and down when I'm stopped at a light. It also randomly shifts really hard (kind of clunks) when coming out of 1st gear (automatic) but shifts OK after that. Check engine light came on and coded out that number 3 cylinder recorded a misfire. Spark plugs have been replaced. It doesn't feel like the engine is miss firing. It drives fine once you get going.
Could be a vacuum leak. When rpms are up, it has enough vac to operate properly. Check all vacuum hoses and make sure they are all on, and look for splits or cracks in the hoses
Posted on Dec 03, 2008
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