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Q-Jet (or any) Carb. Tuning

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by sandy78, Jun 15, 2003.

  1. sandy78

    sandy78 Registered Member

    Nov 28, 2002
    Likes Received:
    I've seen several posts on issues with Q-jet tuning lately, and it jogged my memory about something I did which may be helpful for others. One of the big problems with tuning a carb is knowing if you are rich or lean and when. I used an air/fuel ratio gage (w/LED's ) and an O2 sensor from Summit to tune my Q-Jet after I built my 383. I had a muffler shop weld a bung in the pass. side header collector (it's only 1/2 the engine, but it worked -just treat the other half the same), then wired it up. Total cost approx. $70. It was very simple to see the results of idle mixture changes, rod and jet changes, air filter/housing changes, etc. It's very helpful especially if you need to pass emmissions. I dialed mine in and it passed easily. The real plus is that it runs great. Anyway, hope this helps someone out.
  2. santana

    santana 1/2 ton status

    Jan 11, 2003
    Likes Received:
    Mesa Arizona
    It'd be nice if you were closer, I could use ya to tune mine, Im having trouble with it missing at idle and dieseling plus loss of power. /forums/images/graemlins/mad.gif

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