[Gmecm] Closed loop

[WopOnTour]

David
I don't think I have ever seen a hiway mode ever documented for the 747 anywhere (unlike many others) but "I could be wrong"

Also you min-max O2 values are not really relevant. The ECM only cares whether or not you are above 450mV and takes the same + integrator steps at 200mV as it does at 070mV. As long as it's able to "swing it over" to the other side of 450mV is all that matters. (within a reasonable amount of time so it doesn't affect BLM enough to set a DTC 44 or 45)

I would look to other potential idle issues. What are your IAC counts at idle in both OPEN and CLOSED loop? What do they do when it approaches stall? What is the shape of the "pintle" on the end of the IAC? Is this the IAC that was included with this throttle body? Have you used a NOID light to check the IAC signal integrity. Have you confirmed the quality of the connection at the IAC valve? A lot of idle problems have been caused by issues with the distributor, pickup coil and reluctor magnetism problems- what is the state of the ignition/distributor?

Anyways HTH   
Regards
WOT
  ----- Original Message ----- 
  From: David Haggard 
  To: gmecm at diy-efi.org 
  Sent: Sunday, May 15, 2005 9:31 PM
  Subject: RE: [Gmecm] Closed loop


  Come on, guys! All I was asking was if it was possible to get the O2 sensor readings not to fluctuate so widely. I never claimed to know better. All I said was "I thought" the normal range was smaller than it is. My statement of "I can be wrong," was a simple statement of the truth. I can be wrong. I often am.

  If I had known it would start a flame war, I would never have asked.

  Sheesh! Never mind about the highway mode fuel question!

  David Haggard




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    From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Joe Simmons
    Sent: Sunday, May 15, 2005 9:23 PM
    To: gmecm at diy-efi.org
    Subject: Re: [Gmecm] Closed loop


    I can sympathize completely.....several years ago (Oh, God, more like 20+ years) I graduated from college with a BST in automotive service management, and went looking for a job in the auto industry.  Got stonewalled at every corner....not the right sex, not a minority, not enough documentable dealership experience......and this was in spite of the fact that I supported myself through college managing a radiator shop, mechanicing on the side, and also building (and running) several successful race cars.

    Only job that I could get in management was with a convenience store chain for $18K/yr.

    Never have used my major, but thankfully I had a minor in business.  Now am employed by the #2 US telephone company (thanks, SBC, for hiring me at 38 y/o) as a systems tech,fixing phones, cables, and making the $$$, without management headaches!  Been there 7 1/2 years, and hope to retire at 58.  Life is now good!

    Joe S
      ----- Original Message ----- 
      From: David Cooley 


      Fine... you want the story and want to know why I am bitter, here it is.
      After 17 years in the computer industry, I lost a 70K/year job due to a merger/hostile takeover.
      As they laid everyone off from our company they laughed.  3 months unemployed and nothing in the computer industry in this whole state, I fell on the only other thing I knew... Cars.  I got a job as a mechanic... no big deal, but if I want to make more than 17K/year, I have to get a damn piece of paper and have someone say I am certified and really do know which way a wrench turns... they don't care that I have been building my own engines, rebuilding transmissions, modifying and reprogramming PCM's... no, that's not good enough.
      So yes, I am very bitter, and that is a very sore spot... sorry you had to touch it and get the brunt of my anger...




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        From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of gary
        Sent: Sunday, May 15, 2005 8:19 PM
        To: gmecm at diy-efi.org
        Subject: Re: [Gmecm] Closed loop


        David Cooley, I'd be interested in knowing how old you are, now that
        you have just studied and completed an EM course.

        GAS

          ----- Original Message ----- 
          From: David Cooley 
          To: gmecm at diy-efi.org 
          Sent: Sunday, May 15, 2005 5:08 PM
          Subject: RE: [Gmecm] Closed loop


          if you know how it all works and don't want to listen to anyone that has just studied and completed an engine management course, then why even ask the questions?  Obviously you know all the answers yourself and are wasting our bandwidth.




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            From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf Of David Haggard
            Sent: Sunday, May 15, 2005 6:03 PM
            To: gmecm at diy-efi.org
            Subject: RE: [Gmecm] Closed loop


            But then, I can be wrong.


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