Most diagnostic scanners will provide Mass Fuel Desired (MFD), Injection Control Pressure (ICP), Injection Pressure Regulator (IPR) Duty Cycle, and Injection Pulsewidth (Inj PW). These, combined with Accelerator Pedal (APP) and RPM, can help to provide a really clear picture of what's going on with your injection. Unfortunately, without specific diagnostic equipment, you cannot read Start of Injection (SOI) as Ford does not provide a PID for that parameter.
With all that said, monitoring ICP and PW will help indicate the amount of fuel being injected and whether or not your ICP is falling off at mid/upper RPMs. Loss of ICP as RPMs climb can result in poor atomization, slightly retarded combustion events, loss of performance, and smokey exhaust. Abnormally low ICP is quite often the result of a HPOP that just isn't keeping up or is not adequately sized for modified injectors. It can also be caused by High Pressure Oil Rail bleed-off resulting from a combination of excessive Injection PW and weak injector solenoids failing to adequately hold the injector poppet as pulsewidths increase. In the former case, a new HPOP will help alleviate oil issues. In the latter case, a modest reduction in maximum injection pulsewidth can often restore ICP stability and improve mid/upper RPM performance.
Anyway, those are the parameters we commonly ask for when diagnosing drivability issues with trucks, and I'm sure that most other tuners are going to ask for the same information.
I hope this is helpful.
