Welcome to the forum. If the vehicle cranks good but won't start, have a helper crank it, while you check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. Your obd1, you should be able to check for codes, if there are any. To check for mil codes, you place jumper wire between A & B terminals of datalink connector, turn the key just till the dash lites come on, no further. The mil starts flashing, you count the flashes to get the codes. Your looking for two digit codes.