Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 999 / 749 > fuel pump priming

[mattslade]

I tried to start bike the other day with no joy i thought i was pushing my luck as voltage a bit low afterwards eobd on showng 12.2 13.2 which normally means fuel pump relay but I've dropped the headlight relay in supposedly the same relay with no joy. is there a secret inline fuse somewhere? I've checked the 6 obvious ones. If not what should i try next.

[chrisw]

Fuses - one set by the headlight, two further ones on the battery box. The ones on the battery box are for the ECU (3 amp) and Injection relay (20 amp).

The injection relay fuse is the lower one.

Did you charge the battery?

The ECU is voltage dependent and if it is too low you won't start the bike.

Have you done the secondary earth mod? Worth doing with 749/999's as they get older.

[mattslade]

Charged the battery I've got 12.2 I've started it with as low as 11.7 and i think I've heard the pump prime with lower than that.

[simonducati]

Originally Posted by chrisw

Fuses - one set by the headlight, two further ones on the battery box. The ones on the battery box are for the ECU (3 amp) and Injection relay (20 amp).



Have you done the secondary earth mod? Worth doing with 749/999's as they get older.

What is the secondary mod?

[spurs]

Its either upgrading the battery cables which are available from a few sources , you could look on ebay .
Or putting an extra earth wire from the battery earth to a good clean point on the engine e.g . one of the engine case screws . Which is what i have done - the starter seems to crank the engine over a little faster with this on .

[simonducati]

Originally Posted by spurs

Its either upgrading the battery cables which are available from a few sources , you could look on ebay .
Or putting an extra earth wire from the battery earth to a good clean point on the engine e.g . one of the engine case screws . Which is what i have done - the starter seems to crank the engine over a little faster with this on .

cool, I will look in to upgrading mine as I don't want any issues in the future.

[mattslade]

What exactly do i need to put into ebay to locate what i need?

[simonducati]

Have you checked the resistance in the sensor by the clutch assembly?
I had a problem with that when I had a 748 and it just wouldn't start.

[chrisw]

Originally Posted by mattslade

What exactly do i need to put into ebay to locate what i need?

To do the secondary earth mod read this http://ducatiforum.co.uk/f92/749s-wont-start-12766/