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High frequency fuel pressure data


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Anyone ever record high frequency fuel pressure traces? Been chasing a bit of a leanout issue up top while tuning the car with Cryo, and got my pocket scope on the transducer again tonight, with the timebase cranked down to see individual injector pulses. We'll see what Dave says, but thought you good folks might have some experience to share too.

 

Seeing crazy pressure fluctuations at the injector pulse frequency, trying to see if it might make sense that the injectors sinking fuel could be responsible, since the average pressure about which the oscillation occurs is right where the FPR setpoint should be. I'm talking a 37-75 psi peak to peak oscillation at 13 psi boost, see attached trace.

 

Thanks!

Capture.thumb.PNG.71b51178bb9727ceeeee7458102b5bca.PNG

Edited by awfulwaffle
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