After installing my AFM Vortech S-Triim kit car had intermittent and sporadic check engine light only at normal temps. I't doesn't matter if I use the stock EEC tune or my 3 JMS tunes. Doesn't matter if your driving around town or at highway cruise, light comes on or goes off at different times. Only thing constant is the fact that it doesn't come on at all till the engine is up to normal operating temps.
Wayne
Wayne