Got A Problem

[2003Cavi]

i got a new engine and tranny put in my car but the guy didnt knwo what the fuck he was doing so i took it to another guy and he got it running for me and well i went to take it for the first drive eve and went good until i shifted into 2nd gear and she shut off and it happened to me evertime i tried it did thesame thing over and over and then the next day i went there to try again and it wouldnt start and when i turned the key over like in the off position the injectors would open but when i turned the key on they wouldnt and then itested the power and ground wires on my injectors and bo sides were both showiung power WTF ???????????

[Superdave]

sounds like he hooked one of the grounds up to the starter post instead of the bellhousing stud.

what year car, and engine?

[2003Cavi]

its a 90 Wiring Harness on a 89 grand prix 3.1 its weerd tho because it was running one day and it was running the next