Tuesday, July 27, 2010 - 05:20 pm, by: Tom Richards(Tomr)
as damian states , a high wattage resistor is required. That was the option used on earlier models, a resistor and relay. Is it efficient, i say yes, sure the resistor dissapates power , maybe 50w to 100w , but the fuel pump is disapating less, so overal power consumption is ~ equal. Also this power is nothing, the radio turned to full volume uses the same.
Neil Griffiths Goo Roo NSW I have a Cadillac and a Supercharged Manual V8
Wednesday, July 28, 2010 - 05:21 pm, by: Neil Griffiths(Aussiesc)
I reckon, Install a Walbro 255 in the tank, then just run 12v from a 30amp relay to the pump. ( A little noisier, but cheaper ) You could do all this for maybe less than a fuel ECU.
I have yet to look and see if you can use the ECU wires to install a relay in that spot.
The pumps are getting to 20 yro as well, so they are next on the list. Reason the pump has lasted so long is the reason Toyota installed the Fuel ECU, run it at a lower volt to lengthen its life.
Most Fords & Holdens of the same vintage can be on there 4th fuel pump already.
Wednesday, July 28, 2010 - 06:05 pm, by: Lucas Waterworth(Gadget666)
could do, I already have a 4 gauge cable switched to ignition going to the boot, it would be easy enough to put both the 9v and 12v from the ecu, or the signal to the ecu, into a relay. as I have already bought the ecu and the fan to cool it, it is a moot point.
also, I plan on photographing every step and making a tutorial if anyone wants to do something similar.
Tuesday, August 03, 2010 - 03:28 pm, by: Lucas Waterworth(Gadget666)
and here is the tutorial, I will post it here first as a draft copy for you to look at.
how to replace a fuel pump ecu.
what I have done in this tutorial is to move the fuel pump ecu to the boot, and to put a 12v computer fan on the ecu, but this will also show you what to do if you want to simply replace the ecu where it is, or to actively cool the ecu in it's current location. I would recommend at least cooling the ecu in position if you are going to replace it, as a new fan is nothing compared to the cost of even a second hand FP ecu.
the FP ecu is behind this panel, where the left hand rear passenger's elbow would rest.to get to it, you will need to remove the back seat and the highlighted panel.
to remove the back seat squab, simply pull up sharply on either side, it is held in by the two white plugs and the two metal prongs you see in the photo.
next you will have to remove the three bolts highlighted.
to remove the back seat rest after this, simply pull the squab up sharply and it will pop out, similar to the squab. now, remove the two panel pins highlighted. simply wedge a screwdriver underneath the pin and pry it out.
and this is the FP ecu here, simply remove the bolt highlighted and unplug, if your replacement ecu did not come with a bracket the one currently on the broken ecu will have to be removed. I would recommend asking for the bracket as well when buying a replacement ecu. then plug in the new ecu and bolt into place
here is the plug for the ecu. the wires are as follows. green=power to pump black and red=12v power red and green with silver bands and pink=control wires from engine ecu. black and white with silver stripes=earth.
you could either attach a fan to the ecu now, using a celeron fan, or jaycar sells a nice 5cm cooling fan that fits very nicely, just use the black and red (12v) and black and white (earth) to run the fans. what I will be doing, however, is moving the ecu to the boot, behind the rear liner and above the fuel tank, where there is more free air to cool the ecu, and attaching a fan. to save splicing and soldering, I will be using these clips that cut through the insulation and make contact with the copper inside on both wires, they saved me a good hour I would guess.
this is the FP ecu plug moved to the boot
it is only necessary to move the 12v and control wires to the boot, earth and pump input are accessible in the boot, as shown, simply splice into the dark green for FP input power, and black and white for earth.
and finally, the FP ecu in it's new home in the boot, with fan attached.
+++ jpeg +++ 323075 +++ Upload +++
as I have a subwoofer and amplifier sharing that space I have added another fan on the boot liner to help keep things cool.
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and a Supercharged Manual V8 
