Citroen Agusta F4 R312 1 plus 1 - Recent Questions, Troubleshooting & Support
Why does it vibrate between 65 and 75 mph?
worn cv joints
bent drive shafts /out if balance drive shafts
faulty tires
warped disc rotors
wheel bearing failure or out of adjustment
worn suspension and tie rod ends
Can the computer box make that the car does not want to fire on two plugs
Possible causes could be the coil, ignition module, wire, or the computer(ECM). There are 2 drivers in the ECM that fires two coils at once. 1 and 4 fire together and 2 and 3 fire together. Say, if 1 and 2 don't fire, then it is a mechanical problem. Most likely a blown head gasket. Compression test will find out.
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