Can't Add Fuel

[Justin@VMP]

Email me the file.

[Bill Putnam]

I don't have copies of them.

I put a new FPRS on today we just made a couple of pulls and no change A/F in the high 13 to 14:1 range, FP sits at 40 psi. Is there anything in the tune that would prevent the FP from raising with boost level? The line going to the FPRS is seeing boost we verified that and then removed all other feeds off that line so the line comes off the bottom of the blower and goes right to the FPRS and nothing else.

[dave281sc]

Originally Posted by Bill Putnam

I put a new FPRS on today we just made a couple of pulls and no change A/F in the high 13 to 14:1 range, FP sits at 40 psi.

Well, that sucks. So much for a guess.

Is that absolute fuel pressure measured by a guage or Delta pressure by datalogging?

You need datalog the following now and download it to an xcel file, to review.

MAF Counts or MAF Voltage, RPM, Fwd o2 sensors, Delta fuel pressure, STFT, LTFT, Fuel Pump duty cycle, open/closed loop, Throttle position, Load, Injector pulsewidth, WB A/F ratio, & Absolute Fuel pressure.

[Bill Putnam]

Originally Posted by dave281sc

Well, that sucks. So much for a guess.

Is that absolute fuel pressure measured by a guage or Delta pressure by datalogging?

You need datalog the following now and download it to an xcel file, to review.

MAF Counts or MAF Voltage, RPM, Fwd o2 sensors, Delta fuel pressure, STFT, LTFT, Fuel Pump duty cycle, open/closed loop, Throttle position, Load, Injector pulsewidth, WB A/F ratio, & Absolute Fuel pressure.

It's Delta.

[Justin@VMP]

if its delta then you won't see it raise with boost

[Bill Putnam]

Yeah...for some reason I was thinking we would.