Acceleration or going up an incline can require 10-30 times more fuel per second than just idling or cruising at a steady speed.
With these symptoms the first thing we check is fuel pressure under real world conditions. SINCE as they age fuel pumps produce less and less fuel pressure. The engine is starved for fuel and cannot create enough power.
The stalling may also mean that the electronic fuel pump speed controller has been damaged by the worn pump so that one of its 3 speeds has failed when you try to accelerate the ecu commands max fuel pump speed but the FPCU may just open the circuit and the engine dies.Why we monitor fuel pressure on the road under all conditions of operation.
If the fuel pump has not been replaced in the previous 6 years it is most likely the cause.
Very common failure.
Dealers change fuel pump, fpcu, and fuel filter to avoid come backs due to missing something [rare that they will spend hours diagnosing since customer won't pay] and in the long run all the components fail anyway.
The point is a old worn fuel pump will destroy a FPCU unless changed EARLY and frequently.
The other proble is the pump is not designed to work with E10 gasoline which often has above spec water which cause rust and corrosion inside the pump FASTER than non E10 gasoline. Much depends on local weather days of rain , humidity, and laziness of the personel at tank farm, gas station etc................not daily testing for water in tanks.
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