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I have a question for the tech savy rubicon owners. I'm working on a 2006 rubicon. Currently it has a throttle body spacer and cold air intake. Of course, the fuel pump, regulator, filter, and sending unit are in the tank. I'm planning on replacing those items with a fuel pump, filters, and adjustable fuel pressure regulator with a vacuum port outside the tank. Currently, the jeep fuel system runs at 59 to 60 psi but it is static despite throttle position and load. The factory ECM does not read fuel pressure and does not have any influence on adjusting the fuel pressure. I'm am moving the fuel system outside the tank for easier servicability, and adjustability (I'm also hoping for improved driveability, and maybe a little bit more power). A friend of mine has done the same and found substantial improvements. My question is, using a small range of adjustment of approx 5 psi (60-65psi) and the vaccum port on the pressure regulator, what kind of ECM/programming issues might I experience if any? I understand that I can only increase my fuel pressure so much before I loose power, decrease my effeciency, and/or have no improvements at all if the ECM tries to de-tune if it experiences a rich mixture. My thoughts are that I will likely have a small window of adjustment where I'm hoping to see improvements before increasing the fuel pressure becomes detrimental. The fuel injection shop I bought the parts at said that I should see improvements but if I leave the fuel pressure at the factory psi, and change nothing else except connect the vacuum port on the regulator, I should see improvements. Any thoughts? Has anyone tried this?
Thanks, Chad
Thanks, Chad