Engine falls flat when going into boost?

[Evolution]

Injector rated fuel pressure is what the manufacturer uses to rate their injectors.
Your fuel rail pressure is what you set your fuel rail pressure to or what your fuel pressure guage reads.

Once you have these set, modify your fueling from the VE tables.

[ScarabEpic22]

What Evolution said, DO NOT ADJUST B4001!! Set it according to the proper values for your injectors, then use the VE table to tune. Trying to adjust B4001 will mess up all calculations the PCM does related to fueling, you will have a horrible time tuning it correctly.

[Dewglass]

Injector rated fuel pressure is what the manufacturer uses to rate their injectors.

Where do I get this value?

The injector FLOW rate is available (also assuming this is 80% duty cycle)
Fuel rail pressure is available too ( As I control this via fuel regulator)

Injector rated fuel pressure ? ( Is this calculated or taken from manufacturer? -where do I find it?)

Depending on the value used for Injector Rated Fuel Pressure it affects the flow values.


injectors worksheet.xls

[Evolution]

Almost all fuel injectors are rated by the manufacturer in cc, g/min or lb/hour and are typically rated at 3bar (43.5psi). There are plenty of converters available on-line to convert cc or g/min to lb/hr.

Injector rated fuel pressure will almost always be 43.5psi
You will have to measure your fuel rail pressure, 45-58psi usually.
Then enter the lb/hr of your injectors.

When using a boost compensating pressure regulator, don't try and compensate for the increase in fuel pressure under boost with B4001. Do this soley of the Boost VE Table.

Hope this helps.

[Dewglass]

Almost all fuel injectors are rated by the manufacturer in cc, g/min or lb/hour and are typically rated at 3bar (43.5psi). There are plenty of converters available on-line to convert cc or g/min to lb/hr.

Injector rated fuel pressure will almost always be 43.5psi

Shouldn't this be a constant instead of a variable in the converter tables?

I adjusted the IFR and raised the fuel pressure to 45 psi (from 42) Although I have not done auto VE yet the fuel ratio seems to be in the ball park when cruising- although not going in to boost.

Since this adjustment cold starting is difficult? Is starts right away, but when the idle comes down it dies. I have to manually keep the revs up until it warms up. Idle seems lower to, but I did not change anything?

There is info on the forums for cold starting, but not sure if MAF vs speed density follow the same procedures.

The battery eventually died, so I had to quit while it charges.

Thanks for your help.