just did full tune up on it! but it runs great all the the way through warm up and operation, then when i shut it off and try to restart it the service engine light comes on and it runs like it is missing,and when i then rev it up the speed -o bounces around? if anyone can help me out i would sure appreciate it! thanx

 

You might check to see if there are any codes? Are you saying, it wasn't doing this before the tune-up?