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I'm new here and planning to FAS my '05 xB.
Has anyone with this engine (Yaris, Echo, xB) done a fuel injector cutout for theirs?
I'd like some beta on it so I don't have to re-invent the entire wheel.

btw does anybody think FAS (a term borrowed from hybrids afaik) really makes sense to apply to a conventional engine?
I think of it more like a kill switch.

Thanks!

I'd recommend looking up DIYs on other people's FAS switches. DiamondLarry's switch on his Saturn comes to mind. But, they are all pretty much the same. You splice in a normally closed relay for each injector signal wire and open the relays with a switch.

Its normally called a FAS switch. FAS is a technique.

Well, many of us who are running that engine around here are in
Priuses, and don't have to worry about that! But I would advise
attacking a FAS mod from the other end, i.e. use ONE relay on
the plus side instead of four on the low side. There's a common
wire that heads out to the injectors, you just have to find it
in your harness or at a convenient connection [preferably inside
the cab to keep it out of the weather].
.
_H*

Thanks guys!
I have seen DiamondLarry's thread and will definitely follow his lead.
I would like to Break the common lead to the FI's rather than all four individual leads.

On that note, does anyone have a recommendation for a service manual publisher? I know there are several out there..
Failing that, does anyone know where I can lay my hands on a wiring diagram for this thing?

Thanks - Joel

I found PDF manuals at Scionlife and I got the job about halfway done sunday.
Finding wires under the dash is an absolute nightmare.
After poking around under there a bit I realized there is no way I'm going to find (and splice into!) the wire I need.
So I went back to the engine compartment, unwrapped the tape from the wiring harness where the injector wires come out.
I found the black/red wires coming from each of the injectors, but I couldn't find wherever the junction is that they join to become one wire.
I knew from the schematics and what I observed that these are the common hot. So I took a chance, cut them and joined all 4 of them together on both ends of my cut. Then I used a 14 ga twinlead wire to take each cut end into the cabin.

For now the ends of the twinlead inside the cabin are soldered together, but my next step is to set up a relay to open and close the circuit with a small control switch on my shifter.

Then I hooked the battery back up and....It runs!
I re-taped the wiring harness and got everything put back together and now the rest of the job is inside the car.
I took a good bunch of pictures and I'll post them soon.:Banane08:

The injector coils on your XB have a resistance of between 13.4 to 14.2 ohms. At say 13.4 volts, that means it will only draw 1 amp max. No need to use a relay IMHO. They only fire one at a time, so the draw is not very large. Some use the NC relay saying that it provides a failsafe if the relay fails. Adds complexity to me (KISS). I put a male spade on one side of my switch wiring and female on the other, so if the switch ever fails (highly unlikely), I just plug them together, bypassing the switch. Would take me about 30 sec. max.

I'm clueless.
What does this accomplish ?
Is it when at idle(neutral), you can flip a switch and your injectors will not fire, then you flip the switch as to then put the car in drive + go ??
Please advise.

I'm clueless.
What does this accomplish ?
Is it when at idle(neutral), you can flip a switch and your injectors will not fire, then you flip the switch as to then put the car in drive + go ??
Please advise.

When triggered, cuts fuel to all cylinders, effectively shutting it off. Should only be done while car is moving, with car in neutral. Then you can do what most hybrids do - turns off engine while coasting, saving some gas.