LM1949 drivers

[S. Lastuka]

We are on an SAE team designing an electronic fuel injection system.  We
have completed the design and have a robust system using a Motorola 68hc11
MCU to generate the injector pulses.  We are feeding the injector pulses
into a National Semiconductor LM1949 injector driver.  
Everything seems to work, ie the injectors click on and off, but on the
oscilloscope we notice that the injectors are only taking about .9 Amps
peak and a quarter of that on hold.  We have 2 amp peak, .5 Amp hold
injectors from Seimans.  
We then hooked up a 15 volt power supply directly to the injectors to see
how much current they used with straight uncontrolled power and noticed
that they still only had .9 Amps across them.  The same results were
reached with two different injectors.    
We were wondering if anyone has experience with Seimans injectors in a
diy efi system and if there is a way to get more current through them, so
they "peak" faster.  Thank you,
Sean

ps we're running them dry right now for test purposes, I don't know if
that makes a difference.