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swedge
20-08-10, 04:03 PM
What Size fuse should be used for the fuel pump and ecu perm live?
swedge
21-08-10, 11:55 PM
Anyone? I'm using 14awg wire for them top is that bog enough?
brainsnova
22-08-10, 01:11 AM
in the haynes there is a 20 amp fuse on a cav fuel pump.
mowgli
22-08-10, 09:41 AM
as far as i can tell from the bosch info, there isn't one fitted on the small block mpi setups. their reasoning was something to do with the pump switching in drawing huge ampage for short periods of time...
swedge
22-08-10, 02:05 PM
So no fuse to the fuel pump just the relay
mowgli
22-08-10, 03:16 PM
no. no fuses to either, it is controlled by switching circuits inside the ECU
swedge
22-08-10, 04:53 PM
Sounds wierd not having a fuse between the ecu and battery not so much the pump

I have a fuse online for both but it's heating the fuse up that's for the ecu and ends up melting after a while
mowgli
22-08-10, 05:34 PM
are you beginning to see why there isn't one fitted from the factory, like i said.. they use thermal cutouts so the stuff is safe.
swedge
22-08-10, 06:09 PM
That sounds more like it lol, the fuel pump will still need a fuse though won't it
mowgli
22-08-10, 06:10 PM
No
swedge
22-08-10, 06:27 PM
Ok thanks 14awg wire ok to use for the power to the ecu and pump yeah?
mowgli
22-08-10, 07:25 PM
i'm using 16a whatever that is in new money.
swedge
22-08-10, 07:37 PM
http://www.rbeelectronics.com/wtable.htm

according to this I should be fine
mowgli
22-08-10, 07:39 PM
plenty big enough.