I currently have the viper 5002 installed, never gave me a problem till now...yesterday my car didnt wanna start at all, it cranks but no go! Luckily it happened in my house..well to make a long story short, I have to carry BOTH remotes, OEM remote and the Viper remote. I have to lock it then unlock it using OEM remote. After doing this a few times, the car starts just fine!....it happened again today! What could be causing this? bad Key?

 

Had a bad key on one of my Z's and it would just crank but not turn over. Dealer replaced and reprogrammed the keys and we were good to go.