I have a 1995 Buick Regal 3.8 v6 and the check engine light comes on sometimes, like once or twice a day seemingly random (with 30 min driving). It also randomly will go off, and always turns off after turning off the car and turning it back on. Also occasionally it will lurch about a bit for about 10 -15 seconds (once every 3 days). I have tried to get the diagnostic trouble codes but have been unsuccessful so far. The connector is 12 pin so I am assuming OBD 1, but the pins aren't in the normal places and I have tried shorting them all with each other but my check engine light doesn't flash to give me the codes. The pins are located as below
X X X X X O
X X O X X O
X is nothing and O is a pin.
Does anyone know how to get the codes? Thanks.