[old_master]

Ignition and fuel problems both can cause stalling and no start conditions. Neither one is directly monitored by the OBDII system which means no SES light and no DTC's will be set. It also means that the OBDII system will not help you with diagnostics other than the fact that the problem is not anything that the OBDII system DOES monitor. Other than chasing a ghost, you can wait until it acts up, then figure out if it's a lack of fuel or spark.