[a.graham52]

when the SES light flashes its due to a "catalyst damaging missfire". my college roomate had busted cats on his truck and every once in a while it would plug the exhaust up and it would run like shit. the SES light would flash thne too. pretty much anything that can cause a bad enough missfire will cause your concern. but seeings how inspecting your wires and plugs is free... id do that first. could also be a bad sensor causing it too. thats why a good code ready may be nessasary. youmight not have a CURRENT code but you should still ahve a history code.