Fuel pump question
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Staging Lane
Joined: May 2017
Posts: 61
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Fuel pump question I have installed aeromotive in tank pump 11569. I keep blowing fuses when I stomp on the throttle from take off.
aeromotive had a diagram in the box with the pump I bought. They say to run a 10 gauge wire for the power through the relay. BUT their pump only has like a 12 or 14 gauge wire pig tail comming off of pump ?
What are you guys doing with your in tank fuel pumps as far as wiring ?
aeromotive had a diagram in the box with the pump I bought. They say to run a 10 gauge wire for the power through the relay. BUT their pump only has like a 12 or 14 gauge wire pig tail comming off of pump ?
What are you guys doing with your in tank fuel pumps as far as wiring ?
Any idea of what else is on that circuit? The fuel pump runs constantly so stomping on the throttle shouldn't effect it at all. A larger diameter wire will actually remove resistance from the circuit so the pump could draw more power so that's not your issue either unless you've currently got a wire that's nicked and grounding out under the chassis somewhere. A short on the line or too many amps being drawn on the line is what takes out fuses.
What fuse is it in fuse block... or is it a dedicated in-line?
What amp rating on the fuse?
10g from front (batt) to back (relay) is good to limit amp drop due to line length. What is gauge/length from relay to pump and what is the desired draw from pump. I assume it is 12g but thought I'd ask!
A pump going bad could demand a higher amp draw on start and spike the fuse for too long causing it to blow.
I agree with a dedicated circuit for pump.
I hate pre-built relays with whimpy pigtails! Never made sense to me to go from 10 to 12 on source side. That said I really don't know it that actually matters since the line length from 10G to relay via 12G is short and 12g will support 30amp for a short distance.
Here is a good example of a chart to use for figuring out gauge/amp/distance.
https://www.google.com/search?q=wire...0QNzTEQk2tF8M:
What amp rating on the fuse?
10g from front (batt) to back (relay) is good to limit amp drop due to line length. What is gauge/length from relay to pump and what is the desired draw from pump. I assume it is 12g but thought I'd ask!
A pump going bad could demand a higher amp draw on start and spike the fuse for too long causing it to blow.
I agree with a dedicated circuit for pump.
I hate pre-built relays with whimpy pigtails! Never made sense to me to go from 10 to 12 on source side. That said I really don't know it that actually matters since the line length from 10G to relay via 12G is short and 12g will support 30amp for a short distance.
Here is a good example of a chart to use for figuring out gauge/amp/distance.
https://www.google.com/search?q=wire...0QNzTEQk2tF8M:
