I just installed a 231/237 cam Started the car runs fine had the tuner come to my house and start tuning everything good cars runs and drives fine (7 times around the block)But when he hooed his scanner up.It showed no cam in the car how does one tell if it went bad or what causes them to go bad?Everything is tightened to spec and lock tighted Got a new one on its way from gm suposed to be here tomorrow.hoping this should fix anything I should look for?

 

i had the same problem before i got mine tuned........with the same cam btw

 

so after yours was tuned it read ok what tuning did they run my tuner said the sensor was dead.