High PPE Lift Pump Pressure?

[BlkMax]

I installed a PPE lift pump with a PPE pickup as part of my turbo upgrade. When I logged the fuel pressure, I noticed something I think is kind of strange.

The pressure goes from about 12 psi at idle to over 32 psi when I get into the throttle. Has anyone noticed this when using a lift pump?

I would think that the pressure would drop instead of increase when more fuel is demanded by the tune.

FWIW, I was a little stupid when I installed the transmitter and put it between the FICM and the filter...DOH, cut the wrong hose! I need to change the location to after the filter, but it seems to work now, and I was in a hurry to get the truck on the road.

 

[ripmf666]

Not sure how your getting 32psi max is around 18 at most with that pump. Also not good for your ficm blow the seals out.

 

[BlkMax]

Not sure how your getting 32psi max is around 18 at most with that pump. Also not good for your ficm blow the seals out.

I know...it seems weird, but that is what is showing on the log....I am pretty sure that the transmitter is configured correctly in EFILive, because I get the same readings on the gauge as I do on the log at idle. I am not paying attention to the gauge when I am driving the truck, but I am concerned about the FICM.

Fuel Pressure is the second green line on the right hand side.

 

[ripmf666]

I don't trust that I would have a autometer gauge on it.

 

[BlkMax]

Something weird is going on. When I use my Aeroforce gauge, it does what I expect, the pump output pressure drops to about 8 or 9 psi.

I can not log the transmitter and look at the gauge at the same time, because both the AeroForce and EFILive use the ODB II port.

I went back and looked at the transmitter voltage and EFILive is calculating the pressure correctly based on the voltage.

I am using the same transmitters for drive pressure, boost, and the CP3 inlet pressure. The drive and boost pressures are working correctly. I can compare the stock boost and the new boost transmitter with EFILive and they are spot on +/- 0.2 psi (instrument error). All of the transmitters use the same calculation for the PID. All the transmitters are using the same 5.0 V source.

I was thinking of logging the battery voltage versus the transmitter output voltage. Maybe I am getting something going on there.....

 

[JoshH]

What method did you use to get lift pump pressure to display in EFILive?

 

[BlkMax]

What method did you use to get lift pump pressure to display in EFILive?

I have a transmitter on the fuel line, and I used an A/D input. I have 2 other identical transmitters and they seem to be working just fine.

I may need to talk to AeroForce and see if there is something going on with their transmitters. I did spit the signal coming from the transmitter, one wire to the gauge, and one wire to EFILive. The gauges and EFILive are not on at the same time.