ok. so im breaking in the engine of my 91 sc. and at first i would start it and the check engine light came on and the only way i could keep the car runnin was to rev the engine up. i had a new battery in it but it needs to be charged so i took another good battery and put it in and after that the check engine light went off and the car would finally idle. and it idled smooth. the only thing was from idle when i would give it gas the car would die. now a few of you said to check out any and all leaks, hoses, tubes, ect and i did. there are no leaks and all the hoses, tubes, wires are good. but its still doing the same thing i get it to idle and when i give it gas the car shutters and dies but will start right back up.