EIL_V8
Member
Hi again guys, I have another problem with my UZZ31 if you could lend some advice.
Here's the issue: (Updated).
One day the car refused to fire. Cranks but won't fire.
No fuel delivery.
Swapping the main relay with the dimmer relay does nothing. Other fuses seem good in engine bay...
Applying a cable from battery directly to fuel pump allows car to fire and stay running.
It should also be noted the car has new plugs, wires, coils, distributors, timing belt, water pump, and so on. Everything but the ignition control modules on passenger side (JDM) of engine bay near fuse box are new.
I have the car rigged from Positive battery, to a fuse, to a switch in the cabin, to fuel pump behind rear seat.
Does anyone have any ideas what is going on?
Bridging +B and FP does not allow fuel pump to work when key is turned.
Only applying 12v lets fuel pump run.
Also, my diagnostic dashboard codes are not working for EFI and ECT, they come up as - -.
We've tried 3 different ECU's now, no codes on any. Codes work on other cars.
I am running a Crown 1uzfe ecu apparently, perhaps that has something to do with it...
I am running a "31" ecu from a newer Soarer allegedly.
Fuel pump issue existed with original uzz31 ecu also, it was actually swapped because of it, but never fixed issue.
Thank you!
Here's the issue: (Updated).
One day the car refused to fire. Cranks but won't fire.
No fuel delivery.
Swapping the main relay with the dimmer relay does nothing. Other fuses seem good in engine bay...
Applying a cable from battery directly to fuel pump allows car to fire and stay running.
It should also be noted the car has new plugs, wires, coils, distributors, timing belt, water pump, and so on. Everything but the ignition control modules on passenger side (JDM) of engine bay near fuse box are new.
I have the car rigged from Positive battery, to a fuse, to a switch in the cabin, to fuel pump behind rear seat.
Does anyone have any ideas what is going on?
Bridging +B and FP does not allow fuel pump to work when key is turned.
Only applying 12v lets fuel pump run.
Also, my diagnostic dashboard codes are not working for EFI and ECT, they come up as - -.
We've tried 3 different ECU's now, no codes on any. Codes work on other cars.
I am running a "31" ecu from a newer Soarer allegedly.
Fuel pump issue existed with original uzz31 ecu also, it was actually swapped because of it, but never fixed issue.
Thank you!
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