Ok, I have a 92 RS with a 305. My problem is that about 2 weeks ago my service engine soon light came on. So I took it and hook up the code reader to it and it came back reading that there was nothing wrong with it. So I went on, and now every so often it comes back on after it runs for awhile. Well I got fed up with it today and hooked the code reader back up to it and it came back reading the same thing, no codes being registered. Any one else got this problem, or know of it.