Recent content by 92BlazerSport

  1. 9

    Odd random EGR code 92 blazer 383 TBI

    I’d agree except for I can do the exact same drive several days in a row, cruise set at the same speed and on any given day it is fine or errors. It’s not a tune issue. Looking at a dozen forums, seems this happens broadly. No single common finding but it’s never been an ecm tune from any forum...
  2. 9

    Odd random EGR code 92 blazer 383 TBI

    Of course the AF varies but I’d like to stay on topic. Odd EGR error. My AF varies from 12.9-16.2 and idles at 14.7-14.8. I’ve spoken with Ryan half a dozen times and the gain from the tune would be minimal at best.
  3. 9

    Odd random EGR code 92 blazer 383 TBI

    This build was done specifically to not need an ecm tune. Don’t be mislead by myths on the old ecm’s and tuning. They simply control timing and fuel so far as performance. Running a 14.7 A/F says the tune is fine.
  4. 9

    Odd random EGR code 92 blazer 383 TBI

    Actually the cam I am using is essentially what you’d find in a mid 80s z28 tuned port. The build should run fine on the stock ecm tune. The A/F averages right about 14.7 with the stock ECM so I haven’t done a prom. Good call though! I’m sure at the end of my rope with this goofy issue. I do get...
  5. 9

    Odd random EGR code 92 blazer 383 TBI

    Thanks Richard! I’m going with “no” on the heated sensor as the o2 is mounted in the shorty headers so it’s definitely getting warm enough (or at least I’d think so lol). Along with that it almost never happens on short drives, usually when it throws a code it’s somewhere between 10 and 60 miles...
  6. 9

    Odd random EGR code 92 blazer 383 TBI

    The complete motor build has about 6k miles on it. The intake is new, the tbi is fresh… essentially I replaced everything but the radiator when I did the motor. I’ve went so far as to pull the ECU and ensure all the contacts were good. Thanks for the thought though! Much appreciated.
  7. 9

    Odd random EGR code 92 blazer 383 TBI

    For the past several months since putting a mild 383 in my blazer, I get a random egr code only at highway speeds and never consistently. Seems to have no effect on performance or mpg. I’ve replaced the egr and the controller, the vacuum lines to and from and added grounds. I’m at a loss as it...
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