im working on my girlfriends 4 runner with a 3.0 in it. the motor had a spun rod bearing so i tore it down and replace all the rod bearings and put everything back together and now it will fire up and stay running for like 5 seconds and then die and if i hit the gas before it dies on its own it kills it right then and there i was wondering if someone knows what happen or whats going on with our runner