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Thread: Cyl 2 MFI throttle body locking nut

  1. #1

    Cyl 2 MFI throttle body locking nut

    Is there a special tool or technique to tightening & loosening the locking nut on the No.2 cylinder MFI throttle body (with the stacks on & the air filter buckets etc) Trying to balance my throttle bodies and whilst being able to adjust the screw, tightening the locking nut seems to be essentially impossible.

    I have say the use of the same TB casting on both sides of the engine is terrible idea, all the adjustment screws on the left hand cylinders are so difficult to access wedged up against the MFI pump, they should be on the outer side. Major design failure IMO


  2. #2
    That is a bench top procedure. The air -by-pass screws are what you adjust with engine running and they are accessible with a long screwdriver, spring loaded, no lock nut.
    Early S Registry member #90
    R Gruppe member #138
    Fort Worth Tx.

  3. #3
    Senior Member
    Join Date
    Oct 2010
    Southern Ca.
    You must have '69 throttle bodies , the only way is with an 8mm crows foot wrench .

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