Fuel pump relay rating

[Kieron20V]

Hi, what is the current rating for the fuel pump relay fitted in my cq20v.

from the wiring diagram i can see it powers the fuel pump and also the injectors, but i want to keep as much oem wiring and relays as possible for my ABZ engine swap using 034 stage IIc. I want to run the extra 3 injectors off this 12v feed, and if there is enough over head maybe the coils too. If not i will use the 12v feed to trigger an additional relay and fuses for the ignition coils.



Cheers,

Kieron.

[S2central.net]

I would go with 2nd relay that is triggered by fuel pump relay to supply 12V to the coils.

[Kieron20V]

Cool, thought as much. Much better to hear it from you paul, i know you like your wires

would 30A be sufficient for 8 coils? 30amp relay then two 15a feeds for each bank?

[S2central.net]

Reckon on ~4A per coil... S2/RS2 is 20A on the coil fuse so yeah a 15A per bank smells right.

[Kieron20V]

Which one is the coil fuse? I couldnt see it on the wiring diagrams i have.

[UrS4boy]

I would go with 2nd relay that is triggered by fuel pump relay to supply 12V to the coils.

On the C4 UrS4 and UrS6, with the battery under the rear seat, it is better/easier to add a second relay to relay the fuel pump directly to the battery. This takes load off the J17 fuel pump relay.

DIY Info on Relaying the Fuel Pump:

http://forums.quattroworld.com/s4s6/msgs/24327.phtml