Uh oh...fuel pump death whine

[Goodspeed]

Am I reading this right, the Supra does not have a fuel pressure regulator?

The ECU varies the voltage to the pump to adjust fuel pressure?

Never heard of this strategy before and just want to make sure I understand what's going on.

I meant an upgrade to an aftermarket FPR (Aeromotive...which I might do very soon). I don't know about every other car, but it appears in the MK3 the ECU varies voltage to the stock pump between 9 and 12 volts, depending on conditions. The stock FPR keeps it at a constant pressure, but my understanding is the volume of fuel flowed by the stock pump (???lph) varies by the power it is given.

Edit: Dammit, down the rabbit hole I go. After further tech reading (from my n00b perspective), running a Walbro on the stock FPR is possible, but many have experienced trouble in the future. I'd rather take the headache now. So, time to get a FPR.

Is it true that FPR's don't come with any kind of install kit? It looks like I'll have to now buy the FPR, and this kit.

And my understanding is....fuel rail outlet -------->either side of fpr(plug other side) - bottom of fpr------> stock return line?

So the install seems relatively easy, but what about making these things work? Do you have to set it, do they ramp up pressure per PSI of boost? I think stock the MK3 FPR runs at 33-40 psi.

F%ck!