Sunday, December 21, 2008 - 09:42 pm, by: Rob Rojo(Rob_tt)
I have recently noticed a surging problem when under 80-100% throttle from around 5000rpm. There is no backfiring or miss as such but the car feels to surge as it goes up the through the revs. I have an Emanage Ultimate have had a look at the the data logging and it seems strange as the factory ECU is running the injectors at 100% duty cycle momentarily even while decelerating and then cutting the injectors briefly only to run back at 100% with TPS at 60%. I have tried the Fuel ECU bypass and swapped the spark plugs but neither made a difference. The only reason I am leaning towards the fuel pump is that the Fuel pressure may be dropping as a result of the Pump to preventing enough fuel and the ecu compensating by maxing the injectors to fuel it up again.
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