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About jalexquijano

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    1972 240z
  1. Problem solved. It was the Pertronix Ignitor Module. I had one spare lying around, replaced it and it no longer seems to affect the tach needle. Is this common with Pertronix ignitor?
  2. The weird thing is that the tach needle only flutters at idle when the car has been warmed and driven. At initial warm up it remains quite steady. Any other remedy?
  3. I recently installed a 1761 Pertronix module and 1.5 coil with ballast resistor in my 1972 240z. I also decided to change the 4 year old battery with a Brand new 500 amp battery. After all of these changes i am now noticing that the tach needle is fluttering when the car is sitting on idle. Is this normal? If not, how can it be solved?
  4. jalexquijano

    Sputtering, coughing and misfiring on 1972 240z

    The FSM states 3.4 to 4.2 psi.
  5. jalexquijano

    Sputtering, coughing and misfiring on 1972 240z

    Float level set at .55 inches.
  6. 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.
  7. 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?
  8. .55 inch with or without pressing the needle valve stem? still not clear!!!
  9. 9/16 drill bit with or without pressing the needle valve pin that shuts the fuel?
  10. 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!
  11. Sorry its .55 inches which should be 12mm.
  12. 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?
  13. 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.
  14. 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.

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