i don't understand this 'danica' thing regarding engine problem. normally it's the job of trackside boffins to monitor engine parameters, is it not??? since when a driver had authority to declare weather engine is good or bad, he/she may indicate that it's sounding/feeling funny, but the decision to come to pit box is teams, isn't it???
or is it that NASCAR is yet to adopt to 'Telemetry' and ECU ???
They don't allow live telemetry and lots of other things. This is to keep costs and technology down and also to try to prevent cheating.