So i was recharging the a/c on my 89 3.1 when the engine shuttered and then died. Now when I try to start it, it will only start every ten tries or so. The a/c is off when i try to start it, the fuel pump is working, OBD only reads 12, and can anyone tell me what they think. Where is the a/c relay? What controls engine speed when the a/c is on? Also one of the pressure switches is disconnected (by that I mean cut and it wasn't me that did it.). Thanks

well it started last night and continued running so the solution is, no a/c