rewirring 044 pump
06-05-2009, 08:56 AM
#1
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rewirring 044 pump
HI! Today I measured my pump voltage with engine idling and crap : it was 10V only! Imagine what will it be on boost... (allthough the AFR meter is indicating full rich on boost). I guess that I need to drive the pump with a separate line but what gauge wire is needed? Also what fuse and relay rating?I will use the existing line with the inertia switch to drive the relay so I would be ok. Thanks!
06-05-2009, 04:00 PM
#4
you can use a Single throw relay instead of a SPDT
10v at the pump is dangerous!
make sure you get a good earth point too, there's lots of rusty bits on cossie's - better still, earth back to the battery
28/030 cable should be OK, but dont quote me as wiring isnt my strong point
10v at the pump is dangerous!
make sure you get a good earth point too, there's lots of rusty bits on cossie's - better still, earth back to the battery
28/030 cable should be OK, but dont quote me as wiring isnt my strong point
Last edited by LHD220Turbo; 06-05-2009 at 04:07 PM.
06-05-2009, 05:14 PM
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That's what I thought to do : driving the relay from the existing fuel pump line.
I can connect earth anywere because my car has no rust at all but I prefer to run it from the battery. I didn't know the cable rating since I don't know what current the 044 use when on boost (maybe 17 - 20amp?).
What a SPDT relay is?
I can connect earth anywere because my car has no rust at all but I prefer to run it from the battery. I didn't know the cable rating since I don't know what current the 044 use when on boost (maybe 17 - 20amp?).
What a SPDT relay is?
06-05-2009, 07:13 PM
#6
That's what I thought to do : driving the relay from the existing fuel pump line.
I can connect earth anywere because my car has no rust at all but I prefer to run it from the battery. I didn't know the cable rating since I don't know what current the 044 use when on boost (maybe 17 - 20amp?).
What a SPDT relay is?
I can connect earth anywere because my car has no rust at all but I prefer to run it from the battery. I didn't know the cable rating since I don't know what current the 044 use when on boost (maybe 17 - 20amp?).
What a SPDT relay is?
07-05-2009, 05:14 PM
#7
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I found that fuel pump relay was defective hence the 10V on the pump. After putting new relay the voltage on the pump was 12.5V. Finally I purchased 6mm2 wire with heavy duty contact relay(70 A) and 30 amp fuse and after installing the pump has 13,9V on idle!
It is sounding a lot louder too but not excesively.
It is sounding a lot louder too but not excesively.
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07-05-2009, 06:57 PM
#8
I found that fuel pump relay was defective hence the 10V on the pump. After putting new relay the voltage on the pump was 12.5V. Finally I purchased 6mm2 wire with heavy duty contact relay(70 A) and 30 amp fuse and after installing the pump has 13,9V on idle! It is sounding a lot louder too but not excesively.
It is sounding a lot louder too but not excesively.
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