Hey guys, new here. So I just bought an 01 is300 this week 197k on the body, engine 135k, new trans. It had the stock intake/air box with no air inlet duct, air filter, or evap solenoid. The car ran pretty okay. I got it home and threw on a HPS short ram intake. Couldn’t use the heat shield because I was still waiting for the inlet duct to arrive. The car ran great on the first run after installing the intake. Parked it. Took it out 30 min later and it acts like it’s in limp mode. No lights on which is strange. Really quiet, Idles around 5-700 rpm, bogs when I hit the throttle, hesitates to shift, won’t go above 45mph. Car starts fine, doesn’t stall, will rev fine in neutral. I put the stock intake back, got a filter, and put the inlet duct on, cleaned the maf. No difference. Put a duralast maf of and it ran good for a minute and went back. Still no lights but scanned it and It shows p0100,p0110. New desno maf and still the issue persists. breather tube good. Reset the ecu, cleaned the throttle body, checked the gaskets, coils, coolant, gas cap, etc. I can’t seem to pinpoint the problem to get it running right. Hoping someone can help me out here.