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Message: <blockquote data-quote="QiW" data-source="post: 3003258" data-attributes="member: 1571">20v is OBD I controlled engine .. u will not be able to "tune" it normally .. OBD is a self correcting ECU as its name suggest .. On Board Diagnosticswhatever u try to change in tuning the ECU will try to revert back to the pre-determined factory settings .. the only way u can TRULY tune it is changing the ECU itself ..regarding the tuning the 4 throttle .. YES it can be tuned .. each throttle opens individually and therefore has different vacuum pressure sucking air in .. to tune that vacuum u will need a device that can detect the pressure of the individual throttle at certain RPMs .. hopefully yours has not been meddled with coz that will oso cause incorrect AFR going into engine ..sifoo EG9 ... dont laa so marah ppl .. hehehehei oso wish i have a 20v laa now <img src="https://zerotohundred.com/forums/styles/default/xenforo/smilies/bawling.gif"  class="smilie" loading="lazy" alt=":bawling:" title="Bawling    :bawling:" data-shortname=":bawling:" /></blockquote>

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