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Will it run rich???

Discussion in 'ECU's, Electronics, and Tuning' started by HatchSpeeD, Jun 14, 2007.

  1. HatchSpeeD

    HatchSpeeD ...Hi...

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    Soon i'll be installing my new IM on my motor. I have 370cc injectors waiting to be installed when I get ready for tuning. For now I've been running around with the stock injectors & ecu. What I need to know is if I install 370cc injectors on the stock rail/fpr, will the stock ecu (P30) regulate them or will they just flow a hella more & run rich?
     
    Last edited: Jun 14, 2007
  2. jamesA

    jamesA Well known pissed off telephone guy VIP

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    The ECU should regulate them to stock flow.
     
  3. boofthese

    boofthese New Member

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    why is this in the Wheels/Suspension/Tires/Brakes area ?
     
  4. HatchSpeeD

    HatchSpeeD ...Hi...

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    WTF...it was suppose to be ecu/tuning...plz switch mod's.
     
  5. boofthese

    boofthese New Member

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    LOL thats funny though i was like, uhh a rich tire huh wtf LOL
     
  6. HatchSpeeD

    HatchSpeeD ...Hi...

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  7. GSRCRXsi

    GSRCRXsi Super Moderator Moderator VIP

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    no, the ecu will assume he has stock injectors. and with the aid of the only O2 sensor, it can only adjust so much. so yes, you will run rich.
     
  8. HatchSpeeD

    HatchSpeeD ...Hi...

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    Will it run so rich, it will make me it's bitch?

    I mean, I need to know these things..
     
  9. P7ank5te7

    P7ank5te7 New Member

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    I thought the ecu would adjust up to like 20% from stock? -Gary
     
  10. jamesA

    jamesA Well known pissed off telephone guy VIP

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    So basically the fuel free flows up to the injectors, and the ECU can only do so much? If it's tuned to flow x and the injectors can handle xx, then it will end up flowing xx amount then?

    That makes sense. I stand corrected, I thought backwards.
     
  11. GSRCRXsi

    GSRCRXsi Super Moderator Moderator VIP

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    its around that yea, but 370cc injectors are more than 20% bigger than the stock 240cc

    James, if the ECUcould adjust for anything you wouldnt need to get tuned when you make changes, but of course thats not correct. the only way the ECUcan affect fuel is with the injectors, it doesnt know if you change to larger ones or not. the stock narrow band sensor wil see that its running rich, but it doesnt know how much.
     
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