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jalexquijano

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About jalexquijano

  • Rank
    Advanced Member

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  • Location
    Panama
  • Cars
    1972 240z
  1. jalexquijano

    Sputtering, coughing and misfiring on 1972 240z

    The FSM states 3.4 to 4.2 psi.
  2. jalexquijano

    Sputtering, coughing and misfiring on 1972 240z

    Float level set at .55 inches.
  3. jalexquijano

    Sputtering, coughing and misfiring on 1972 240z

    Twin SU Carb. Float level was already set to .55 inches. Pertronix Ignitor module with pertronix flamethrower coil. I am even getting intake backfire with the both idle mixture knobs set to 3.70 turns clockwise. No vacuum leaks.
  4. My 240z is sputtering, coughing and misfiring during the first 15 minutes since cranked. Is this normal? I have to run it with the choke lever pulled until the temp reaches to half of the temp gauge. After that it runs rough. I have cleaned all the plugs to see if it solves the problem. Airtex 8012sx electric fuel pump is just pushing 3.2 psi. Coud this be the cause of the symptoms addressed?
  5. .55 inch with or without pressing the needle valve stem? still not clear!!!
  6. 9/16 drill bit with or without pressing the needle valve pin that shuts the fuel?
  7. jalexquijano

    hitachi float adjust?

    Does the float tang on the 3 screws su carbs touches or presses the needle valve pin? I am still confused how to obtain the precise .55 inch gap on both floats. Nobody seems to clear this out! Ztherapy Just SU DVD dealt with Grose jets and not needle and valve!
  8. Sorry its .55 inches which should be 12mm.
  9. After watching the just su dvd produced by ztherapy i was wondering where can i get a ruler to neasure the 9/16 or .55 mm gap needed for the floats. How would you get a precise measurement?
  10. Well when the pump was new the pressure was 4.3 and i had no hesitation or backfire between 3000 to 4500 rpms going from 2nd to 3rd gear.
  11. Its weird i used to have 4.3 psi and now only 3.2. Car hesitates and backfires between 3000 to 4000 rpms. Once i put in a new pump it raises to 4.3 and no more hesitation or backfire.
  12. My mechanic left the airtex 8012s electric fuel pump on the on position without cranking the engine and now the fuel pressure at the carbs has lowered from 4.3 psi to 3.2. Question? Could the filter that is besides the pump be clogged and thus causing the decrease in psi or could the pump be partially damage due to his negligence on not craking the engine immediately.
  13. Which air fuel ratio gauge is recommended to get the precise mixture on my 240z? Innovate??? Which model and brand?
  14. jalexquijano

    Deceleration popping at exhaust with new MSA Premium exhaust

    How many HP wil i loose?
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