larrys2006 Posted March 14, 2020 Share Posted March 14, 2020 (edited) after running the car for 40 min I shut it off, the car had 47 psi on the rail and after 5 min it lost 11 psi them after 15 min it lost 15 psi more is this normal? I puled off vacuum to the pressure regulator and plugged the hose when it was running with no increase from 39 psi but some days now it is 53 psi I thought when I pull vacuum it should go up 5 to 10 psi. I run - -6 and -9 ltr shorts look good oscillate +-2 in 2 seconds only code now p1300 and ox sensor unit not ready and same with evap scanner says ready individual pid for selecting these says these are not ready but if I hit the i/m button it says they are good.. I use a launch melinuem 90pro also it says short term b1-s1 meadings move and b2-s1 but b1-s2 and b2-s2 are locked on +98%, map is 4.568, maf .0349 b/s at 2400 rpm 2004 grand marquis Edited March 14, 2020 by larrys2006 Quote Link to comment Share on other sites More sharing options...
YT90SC Posted March 14, 2020 Share Posted March 14, 2020 What year car? Assuming it is a Crown Vic? P1300 is a code I am unfamiliar with. Any other symptoms than the code? Quote Link to comment Share on other sites More sharing options...
larrys2006 Posted March 14, 2020 Author Share Posted March 14, 2020 2004 grand marquis no symptoms just what I said. Quote Link to comment Share on other sites More sharing options...
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