Monday, December 15th, 2008 AT 8:01 PM
I just had a 90,000 mile tune-up and had spark plugs and wired, distributor cap, fuel and and air filters replaced etc. I did not do the timing belt and water pump at this time. It's been almost a week and my "check engine" light came on. I've never had any engine problems and my fuel cap is new. The car runs fine except it idles a little rough when first started. This is new since I got the tune up done. Could this be related to the tune-up? I feel like these guys ripped me off charging me $700 for a tune up that didn't include a timing belt or water pump. Should I take it back and demand a free diagnostic? Could they have done this? What could it be?