• Welcome to the Pontiac Trans Am Community, the Official Home of the PTA! Sign up for a (FREE) account today!

Recent content by Taint3d

  1. T

    1970 Firebird Formula 400 - Air-fuel Mixture Starting Point?

    Ok, so first of all, I double-checked my timing, and I believe this was my biggest issue. I had initially set it at 9 degrees according to the vehicle's spec, but it seems the distributor has slipped, and it was at like 15. So I reset that to spec, and it seems like my issue was immediately...
  2. T

    1970 Firebird Formula 400 - Air-fuel Mixture Starting Point?

    Ok great! Thank you so much. I’ll go through this today and report back.
  3. T

    1970 Firebird Formula 400 - Air-fuel Mixture Starting Point?

    The vacuum is about 19 psi at the Moment. Thank you! I’ll try this.
  4. T

    1970 Firebird Formula 400 - Air-fuel Mixture Starting Point?

    When I press down on the float, it sits horizontal, not up and not down.
  5. T

    1970 Firebird Formula 400 - Air-fuel Mixture Starting Point?

    I did a full rebuild kit on the carb soaked it in carb cleaner. The vacuum seems good after I changed the primary vacuum diaphragm. Did new needle/seat/jets and accelerator pump. I’ve got a vacuum gauge and I guess my question is where to start tuning? I’ve watched all the YouTube videos...
  6. T

    1970 Firebird Formula 400 - Air-fuel Mixture Starting Point?

    I rebuilt the carb 3 months ago. I did fuel pump/water pump/timing chain cover/valve cover gaskets/engine oil/trans fluid/spark plugs/new electronic distributor/trans pan gasket/new starter and a few other things since I got it. I am a newbie so forgive me if this seems like an elementary...
  7. T

    1970 Firebird Formula 400 - Air-fuel Mixture Starting Point?

    Hey there, I inherited my dad's 1970 Firebird Formula 400 RAM air 3, and I’ve got it running pretty well after sitting for 30+years. But I have some questions about tuning the air-fuel mixture screws properly on my original quadrajet carb. I’ve got both screws out 2.5 turns, and it seems to...
See more