Boost reading

Discussion in 'Fiesta ST Chat and Discussion' started by JRFist, Feb 23, 2015.

  1. JRFist

    JRFist New Member

    Im fairly new, this is my first new car and first time ever modifying. I couldnt wait to start modding and im cobb Stage 2 with just under 500 miles lol. I did a boost reading with the ap3 and noticed casual driving around -11 to -12. When i Floored it, i seen a max of 4.77 in 3rd gear. Isnt it suppose to be around 20??? im worried
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  3. RodMoe

    RodMoe Well-Known Member

    Yup should pop to 20-21 real easy check for loose hose clamps on the turbo to FIMC to intake charge piping..
  4. Dyn085

    Dyn085 Active Member

    It sounds like you're reading spring pressure. Make sure you're not on the eco map of your tune by pressing the cancel/resume button on your cruise control and seeing where your tach jumps to. If it jumps to 2k, then hit the decel button so that it drops to 1k. I would do this first before checking clamps. If changing the map doesn't do it then you need to find your leak.

    You won't notice it as much in first or second due to the gearing, but third basically falls on its face if you're on the eco map.
  5. Dylanc

    Dylanc New Member

    +1 on the double check your not in eco mode.. I was for a week had no idea lol gas mileage was nice though hahah
  6. JRFist

    JRFist New Member

    Amazing!! I'm so grateful dude life without boost was depressing haha! I noticed the rpms went up to 2k when I hit the can/res button, then pressed decel and it worked. Got into 3rd gear and smoked my tires off its awesome to see 21 psi on the boost gauge. I reset my map to stage 2 93, then I noticed when I started the car i had to redo the can/res again. Thanks a million!
    Dyn085 likes this.
  7. Dyn085

    Dyn085 Active Member

    Yeah, I've run the eco mode a few times and the first thing I noticed was how it feels so dead in third gear. I initially would run it to mostly stay out of boost when the engine wasn't warmed up until almost getting slammed crossing an intersection by someone running a red light. I realized at the exact moment I needed the power that wasn't available that eco mode didn't fit into my life outside of the interstate.

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