- Joined
- Jun 22, 2012
- Messages
- 59
- Reaction score
- 2
- Points
- 8
- Location
- NOVA
- Vehicle Year
- 1989
- Make / Model
- Ford
- Engine Size
- 2.9
- Transmission
- Automatic
89 2.9. smooth, but backfires under load. pulled codes. Two 'goods', but with a memory code of 16. My cribsheet says code 16 is "ignition diagnostic monitor (IDM) not detected". What is that? Where is that?