Vacuum Leak?! Lean at Idle!

Discussion in 'Mazdaspeed 3 Troubleshooting' started by Akia Hawkins, Mar 23, 2023.

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  1. Akia Hawkins

    Akia Hawkins Greenie Member

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    08 MS3 Rough Idle?!
    +20-24.80 STFT’s, AFR bouncing around between high 13’s to low 17’s. Vacuum at Idle is -4’s.
    Found a couple small vacuum leaks, including MAF sensor oring was broken. 1 revision in from Freektune, trying to get the issue lined out, any ideas? Justin emailed and said it was a faulty VVT. Which was brand new had less then 1K miles, so I replaced it all again anyways, using timing tool so timing is good, and have the same exact issue.
    There’s a log posted.
     

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    Akia Hawkins, via an iPhone, Mar 23, 2023
    #1
  2. Easter Bunny

    Easter Bunny Professional Engineer Motorhead Platinum Member

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    What all have you done to check for leaks
     
    Easter Bunny, via a mobile device, Mar 24, 2023
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