Low/failing HPFP logs?

destrux

Member
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2007 Mazdaspeed3 GT Black Mica
Anyone have any dashhawk logs they can send me or post of exactly what it looks like when the DI pump starts to drop off pressure?

I logged my car yesterday with the dashhawk and I'm getting a constant 1700psi till redline in 3rd (didn't get to test in 4th yet) except for a few weird intermittent spikes down to 1250 or so. The A/F ratio doesn't drop off, it stays right around 10.7:1 to 11.5:1 the entire time.

I'm thinking maybe a failing/defective HPFP solenoid? I don't think it's the HPFP internals needing an upgrade yet (wouldn't that be a gradual constant dropoff of pressure the more the load and RPM goes up?). I only have a few bolt-ons and am still running stock boost.
 
If you see ANY blips that drop below 1600 at WOT, your HPFP needs to be upgraded.
 
Excel viewer won't open those for some reason.

I suppose I'll need the pump internals anyway if I plan to do more mods... might aswell get them now. I just hope it's not a problem with the spill valve. Just seems odd to me that it only does it occasionally and not every time I dump the throttle at high RPM in 3rd gear.

I have one of the early production cars, and never had the fuel pump TSB done (because I never had a problem with it, so they wouldn't do it). I know the TSB involved changing the pump if a problem was experienced, but there was also a reflash... what did that reflash do?
 

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