Vacuum leak? (Page 2/2) Jason88Notchie MAY 22, 01:42 PM quote Originally posted by Wacko1Jacko12: 1. I ended up plugging it off and replacing the cap next to it (old one was deuterated). My engine does not have a fuel vapor canister and cruise control. I know I do not need the EVAP canister, but I would like it back in (I like things original). 2. I then started my car and could still hear a whistle noise but not as bad (somewhere else there's a leak I bet). I will take a look based off this diagram. Thank you for sending that! 3. I then used Tuner Pro RT to see some data, surprised I did not see anything about the EGR and no-fault codes at all (hope I am reading it correctly). If there was an alarm, does it say FAULTED near the code? -Makes me believe whichever owner at the time actually properly deleted the EGR on the chip (SHOCKED!). 4. Based off this data, is there anything concerning? I am not sure what most of these values are supposed to be close to during idle. MAT=air temp in the intake O2=voltage reading represents lean/rich. 200-800 millivolt is average range. TPS=throttle position sensor. At lowest point around .5v at idle. And about 4.5v WOT. (wide open throttle) .25v at idle looks to me too low. With JUST THE IGNITION on press throttle all the way to the floor. If less then 4ish, I suspect a faulty TPS sensor.