Bins for 89 305 TPI?

[Bruce Plecan]

  From: Craig Moates 
  Subject: Re: Bins for 89 305 TPI?

  Unplug the MAF, and drive it.  If better trash the MAF.
  With the engine idling tap on the MAF with a screwdriver (no.4 dethermilized), if the engine falters, replace the MAF.
  I've never had good luck with relays other then Bosch or Delco (long term).
  Grumpy
     
  The replacement MAFs (non Delco) are getting touch and go (marginal in quality).


  I've got like 7 relays, 4 new, tried rotating them all around between fuel pump, MAF power, and burnoff. No luck. Back-cut & soldered & patched in new connectors (relays & MAF) into the harness, shrink-tube & all, still no luck. Swapped out TPS, adjusted all different ways, no luck. I'm still open to suggestions though. It's definitely getting funky signal, cause it's rough as all get-out when it trips. I've also got a copy of the GM bulletins relating to TPI MAF's if anyone is interested. Hey, those relays could still be squirrely, I've not replaced with GM genuine parts or anything. Although the MAF supply voltage checks out during a trip...
   
  Thanks,
  -Craig
    -----Original Message-----
    From: Mark Romans <romans at pacbell.net>
    To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
    Date: Monday, November 15, 1999 3:09 PM
    Subject: Re: Bins for 89 305 TPI?


    Replace the relay's.  There's a GM bulletin on this.  Terry, Kev just replaced the relay's on his new ta and it fixed, this after he looked at them under a microscope and was "SURE" they were ok.
    Mark
      -----Original Message-----
      From: TK <terryk at foothill.net>
      To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
      Date: Sunday, November 14, 1999 8:13 PM
      Subject: Re: Bins for 89 305 TPI?


      Isn't the max maf airflow table used for throwing a Malf 33 (MAF too high)? It's RPM VS AIRFLOW.

      Peter? Bruce?
        I'm working with MAF still, still having this weird problem of intermittent Code33(MAFHI). One of these days, I'll figure it out. Must be loose wire somewhere, maybe in the sensor, maybe something else loose or spikey. Maybe throw some caps around & see what happens. Might like one of those heated O2 sensors for the TA. Probably speed closed-loop approach with headers.
         
        Comments appreciated, particularly with respect to happy hackers with 305TPI applications.
         
        Thanks,
        -Craig
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