Standing in front of the vehicle looking at the the coil packs, there are three of them. From left to right, the first coil pack is 1 & 4, the second coil pack is 6 & 3, and the third coil pack is 2 & 5. Now still standing in front of the engine, the first three cylinders in front of the radiator are 2,4 & 6 and the last three near the firewall are 1,3 & 5. The firing order is 1,2,3,4,5,6 if it is a 2.8 or 3.1. What you did not say is what engine it has (2.8 VIN "W" or 3.1 VIN "T") and if it is a Cutlass Supreme or Ciera or what Cutlass.
If it's the 3.1L, then it's 1-2-3-4-5-6.
1-6-5-4-3-2 Look at the link I posted.
How do you change the heater core on a 1989 Oldsmobile Cutlass Ciera? or where can I get the Info on replaceing it
The firing order for a 1989 Oldsmobile Delta 88 3.8L V6 is: 1-6-5-4-3-2 The #1 cylinder is located in the RIGHT FRONT.
Try nada.com
In the fuel tank
Why is the electric coolant fan in your 1989 Oldsmobile cutlass cierra not working?
fuse
300.00
Chain
Firing order on both 2.8 and 3.1 1-2-3-4-5-6 1-3-5 at rear of engine 2-4-6- front of engine
59 Liters or 15.59 Gallons