Saturday my opti gave the the check engine light as well as a intermittent beep miss-fired twice at the same time the alarm started before I shut it down. Really have no idea what other info to add besides the fact that it had plenty of oil in resivour, and was not overheating. I have not found a place to put a DDT on it yet.... if I do I'll give you the low down on it. So all that said any obvious ideas as to what my problem is?