Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > Monsters > Monster S4 916 fires once but will not start

[dunlop0_1]

Sounds similar to the fault I had at Anglesey. Eventually backfired and set fire to the air filters . Turned out to be the air pressure sensor, the one on the header tank.

However you mention an immobilizer? does it have an alarm because that would be my first suspect.

[skidlids]

Originally Posted by dunlop0_1

Sounds similar to the fault I had at Anglesey. Eventually backfired and set fire to the air filters . Turned out to be the air pressure sensor, the one on the header tank.

However you mention an immobilizer? does it have an alarm because that would be my first suspect.

Neil it uses a 59M ECU with a separate OEM immobiliser. All very similar to a Class A DD bike

[carsbikesboatsplanes]

Air press sensor on 2001 has no electric connection. Tried stick coils. All points to CPS timing sensor but tried that too. All sensors, wiring checked. Phonic wheel checked. Re;lays checked. New flashed ecu and racing ecu tried. Good battery tried. All switches checked including sidestand etc, When cranking, fires once and if held may fire again after about 19 seconds, Tried turning back wheel in gear with plugs out also gives one spark. Tried pulling CPS out and using iron rod to trigger cps, sparks each time, Pump runs, injectors pulse once like plugs,

[dunlop0_1]

Thanks for that for that Kev.

Only thing left for me would be to change the loom for a known working one and then start again from scratch.

[Iconic944ss]

Does anyone know if the Ducati-Diag software would throw up any faults that might help...

Just curious, for possible future info...

[Iconic944ss]

A quick look found similar problems elsewhere but nothing specific.

Here is a Ducati forum specific search for you to try:

Iconic MegaSearch

[skidlids]

As you say, it all points to the Crank Sensor, certainly worth trying another one