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  1. #1

    R12X won't turn more than 5500 rpm....

    Had a Jim's Alpha kit from my old F12X laying around, and installed it on my stock R12X which used to turn 6100 rpm, and gps'd 62.2 mph...removed the kit after hitting the FI code a few times, wouldnt adjust out, and now back like it was but only 5500 rpm, and mabe 55 mph.....any suggestions?


  2. #2
    jlfx car audio's Avatar
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    Man this question has been answered about 10 times over the.past month check my posts

  3. #3
    supermac's Avatar
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    wastegate solenoid is bad, or when you removed the kit you didn't get the plumbing connected correctly and you are not bleeding off any air from the wastegate circuit.

  4. #4
    Thanks Mac. It's frustraiting cause I ride this ski every weekend, and it was running perfect before I put the alpha kit on... I did read where it might have stored a fault code in the ecm that might have to be erased using the jumper wire method. You think that might have happened?

  5. #5
    supermac's Avatar
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    Quote Originally Posted by river_ratt View Post
    Thanks Mac. It's frustraiting cause I ride this ski every weekend, and it was running perfect before I put the alpha kit on... I did read where it might have stored a fault code in the ecm that might have to be erased using the jumper wire method. You think that might have happened?
    I doubt it. Check your waste gate solenoid. 5500 rpm usually means 7psi of boost

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