89 pontiac firebird no power?

[Erica F]

okay i have an 89 pontiac firebird it's a v6 2.8l I just had a new vats module installed and a new starter and a new ignition switch. I will try to start the car and nothing will happen no dash lights or anything, But at the same time it will just start working again all own it's own. I know I have power to the battery power to the starter and power to the alternator. is my car just possessed or wat please help....

 

[Mark G]

what about your ground? You have a cable running to the engine block and another one running th the chassis. If I remember correctly the chassis ground runs from the back of the engine on the right side to the fire wall just below the windshield make sure both grounds are good.