Contour Enthusiasts Group Archives Forums Modifications General Mods SVT Contour Replacement Fuel Pump

So Stanzi your running returnless system with a 155LPH pump? I think stock is 85 LPH so thre was some question if the ECU would be able to compensate for the extra pumping abaility,

ie Lets say the O2's said it was lean and needed fuel the ECU would raise the voltage to the pump to lets say 12V, then it its stoich and the ECU lowers the voltage to say 4V. What was unkown was if the ECU woudl realize that instead of 12V it only needed 10V to get the same amount of fuel OR it wouldn't have to run it at 12V for the same time period as the stocker before it hit stoich then when it would have cut to 4V it says "well that is still too much fuel and I'm cutting it back to 2V"

Do you have the ability to check your Fuel Pressure? I would be interested in if if increased or not, if not then we know for sure the ECU is smart enough to compensate for the extra flow.

Last note was the GSX a returnless pump as well?