[jwakil]

My my 83SC with 1977 3.O CIS engine has a peculiar problem on cold start-ups in the morning. The first time I turn the key, it will slowly chug and chug at <400RPM, giving out a few pops or backfires. Eight times out of ten the RPMs will rise as they should after ~10 seconds, and the other few times the engine will die out but always start right up on the second key turn. Would this indicate a cold start switch, Auxilary Air Regulator, or other problem? It doesn't have this problem when engine is warm.