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This is the limp mode or the reduce engine mode, it would also set a code for this condition
P0AA6 Hybrid battery voltage system isolation fault Toyota put out a TSB about this condition TSB # 2558R
How the fuel pressure on your year make and model it should be at 41-47 psi, When you accelerate and it stalls out the 3 main suspicious culprits would be the TPS sensor , The MAF (mass air flow) or the fuel pressure, You should see if there is a code that is set.
The purple wire connects to the fan which connects to the fan high speed relay, you would need a good wiring diagram to clear the situation up.
Have it scan for code, what causes this is the APP sensor which is the gas pedal,
This is a broken suspension components from the upper to the lower suspension component,
On the positive side of the battery terminal there is a fuse if either of this fuse goes open you can expect a stiff P/S and a non working air condition, and a no communication with the ECM.
Both these transmission takes a 4T80-E the difference if you have a VIN 9 the difference is there is VIN Y so there is a difference and it is not interchangeable, you need to go by the VIN
For the transmission it is ATF SP-III or SK ATF SP-III
The distributor if it is out of timing it back fire through the throttle body this is cold a cough where it is enough to catch the throttle body on fire especially if there is no air cleaner cover, the firing order has to be correct and if it is correct the timing can still be off due to a reluctor in the distributor that may have shifted.