I have a saturn s series 2001. It feels like the engine is missing and the transmission isn't shifting as smoothly as it did. I first noticed it when I got gas a week ago and instead of the normal 32 or so mpg I had gotten about 26 on that tank. Since then I have put in new spark plugs, spark plug wires, checked and rechecked the fluids and looked at the vacuum lines for deterioration to rule that out. I also ran a bottle of injector cleaner though on the off chance it might help. It seems to be getting progressively worse. What could this be and where should I look next?
Saturday, July 7th, 2012 AT 4:58 AM