FPDM Output Frequency?

Does anyone know what the output frequency of the FPDM to drive the pumps is? From my understanding the FPDM takes a 150Hz (0-5V?) 5-50% duty cycle PWM signal from the PCM and turns it into a 10-100% 0-12V signal to drive the fuel pumps. I haven't been able to find an answer anywhere and don't have an oscilloscope handy during lockdown.

Why you ask? I'm running a new external Fuelab Prodigy pump that's got essentially a PWM control stud that allows you to treat it as variable speed. Making use of this feature would allow me to retain all the safeties, diagnostics, and features of the stock setup, while managing fuel temperatures without the need for a controller, Hobbs switch or fuel cooler.

My big concern is that the output doesn't increase the frequency at all, as the Fuelab pump requires a 500-1500Hz signal.

Home

Try in here. Seems to have everything

I didn't see anything to that effect and haven't had any luck elsewhere.

Oh well. Eventually I'd like to make an Arduino controller to effectively take the place of the FPDM and translate the PCM's commanded PWM signal to one that the pump will accept. In the meantime I'll probably just run a Hobbs switch to go between 50% and 100% output.

Option B

ED. Modular fords always gives great information.

Uncle Meat on here was another.

Than on here we have a couple tuners

That may be able to offer what your looking for.

Thanks. From what I gather across the internet the consensus seems to be 25kHz is the fuel pump frequency. Though for anyone reading I will mention that it's less of a PWM and more of a pulse where the FPDM closes a ground on it. Ex a PWM would go hi/lo/hi/lo where as the fuel pump (-) goes open/lo/open/lo. This can be effectively used for PWM with some manipulation but that's another story.

I haven't been able to figure out anything to change PWM frequency without a microcontroller, but I'm no expert.