ECM fault Beating thread to death

[CSH-HQ]

More to it then that, to cover long archives data:
The ecm looks for a response in the O2 in relation to B/L corrections,
to include a time delay.
  I got one to work at certain rpm, on my bench but it's work,
on a running engine would/could be grief to get even close.
Grumpy
  

>If O2 is not used at idle, then it's too bad, because it is the only thing
>on the engine which appears not to work properly. It's response at idle is
>slow.
>
>I was going to make an oscillator cirquit to simulate proper (faster) O2
>responce at idle and try to fool the engine into believing that this is a
>real O2 sensor. I would vary the width of the pulse above/blow 0.45V
>boundary, to command lean/reach mixture. I was hoping to influence idle this
>way. Does anyone think that it would work as a test measure?
>
>-----Original Message-----
>From: Geoff Richards [mailto:geoffsue at one.net.au]
>Sent: Tuesday, November 09, 1999 2:38 PM
>To: gmecm at efi332.eng.ohio-state.edu
>Subject: Re: ECM fault?
>
>
>
>Mike wrote
>
>
>> How do you figure???  Did you erase the ecm... make it go dumb? Then drive
>> it for a while?.. the o2 sensor is not used when you first start up or
>when
>> you are idling correct?
>I beleive the 02 sensor is not used at idle as there is a richer idle map ?
>for idle
>quality (smooth)
>Geoff Richards
>