sphen22

Here is a nice plot of the before and after on a relayed direct current to the pump. 11.2v to 13.6 when 100% duty. Then after got my e85 tune.

 

http://i341.photobucket.com/albums/o381/sphen22/IMG_20130926_193319_038_zps8de40042.jpg

 

 

http://i341.photobucket.com/albums/o381/sphen22/IMG_20130926_193253_981_zps9fea94b7.jpg

I'll try to make it simple if I can.

 

*) 12g + wire from battery to a relay

*) 12g + wire from relay to pump

*) 12g - wire from pump to Control Module

*) Use the original factory power wire that runs to the FPCM (control module), splice, and feed both the 1) FPC module and 2) the relay.... As a result you will have battery power running to the pump, a relay that turns on that power, a fpcm that is functional because it is powered, and the retention of the Negative side modulation. You will also terminate the original Fuel Pump power wire coming out of the FPCM.

 

Hope this makes sense. I am seeing about 13.6-13.8 volts at the pump (100% fp duty cycle) while retaining the factory modulation of the fuel pump.

 

Beautiful! Thank you.

Congratulations. Is she your first one?

Read through a lot of it but must have missed the negative side controlling modulation. Why isn't this moved to the op. Instead of having to read through all the pages.

 

So all I need to do is run a lower gauge wire directly to the fuel pump then through a relay.

 

Then lower the gauge on the module to pump for negative terminal.

 

Do you run the old high gauge positive from the module into the new low gauge from the relay, splicing it just before the pump?

Will do

Oh sorry, not using the switch for the application on the web page but instead using it in parallel with the oem fuel pump wiring, with the switch activating a direct battery current to the Fuel Pump when above 10 psi when the pump is already at 100%. This way during idle and cruise it would still get the staggered voltage from the FPC.

Cobb Tuning Socal just recommended this as a fix for the low voltage problem

 

http://www.kipanderson.net/rs/hobbs.htm

 

Anyone have any experience with such an animal? Seems like a good idea as it only will come on above 10psi if set to.

My little guy after snoozing to the sound of the Q300 lullaby

 

http://i341.photobucket.com/albums/o381/sphen22/IMG_20130823_173524_240_zps68d4b840.jpg

#394 / 500 here in Southern California, Second owner and bought it strictly because the local Subaru dealer had it marked as a standard LGT Limited. Bought back in 2009 with 18k for $20k a STEAL!!

 

She's getting a Cobb CAI with box, Invidia HF Cat Down and Q300 next week!!