It is behind the battery.
On a 1991 Dodge D150, the Engine Control Unit (ECU) is typically located under the dashboard, near the driver's side. It may be mounted on the firewall or near the steering column. To access it, you might need to remove some panels or trim pieces. Always consult a service manual for specific details related to your vehicle.
Yes, the computer is required to run the engine.
No, that is for OBD2 cars.
If, by ECU you mean "Engine Control Unit", I don't believe a 1968 dodge pickup had one.
behind the radio across the back of the center console
near the back of the engine bay, it says in bold lettering ECU 3000
The engine computer is the voltage regulator.
P0607 ECU Internal Performance , the computer has failed.
There is a scan port on the passenger side under the dash by the body computer there is also another one above the ecu on the diver side of the engine bay
yep need a dif ecu though
It means the ECU has detected a problem with the emissions system.
It means the ECU has detected a problem with the emissions system.