747 newbie question

[Bruce Plecan]

You'll also, want to start trouble shooting with the highest number first.
Least that works best for me
Bruce




> Check codes by shorting pins A & B on the ALDL connector.  A and B are
> the 2 pins in the top row, right end of the ALDL connector.  Turn the
> key on and watch the flashes.  You'll see code 12 3 times, any other
> codes 3 times each, then code 12 again.  12 looks like this:
>
> flash <short pause> flash flash <long pause>
>
> Code 12 can be ignored.  Other codes are similar.  The service manual
> will have troubleshooting flowcharts and explanations of how the systems
> work that you'll really need if you want to work on it.  It may cost $70
> or so from helm but it's well worth it.  Chiltons and the like will just
> frustrate you.
>
> detonation at idle?
>
> --steve
>
> Brian Hourigan wrote:
> >
> > Hello,
> >
> > I have a 87 k5 blazer that recently has been intermittently running
> > horrible, it feels like its on 2 cylinders, has intermittent slight
> > detonation (at idle), and sometimes dies at idle.
> >
> > I am thinking it is going into limp home mode, the check engine lamp
came
> > on intermittently but did not stay on.
> >
> > The problem seems to occur 'randomly', no relation to enviroment,
> > elevation, temperature, etc.
> >
> > Is there a way to retreive codes via the light flashing on this computer
> > or must I use a scanner?
> >
> > I apologize for the off topic post but any information is appreicated..
> >
> > I have refrenced the FAQs and any documentation that was readily
> > available. Any pointers to information resources are welcome.
> >
>
> --------------------------------------------------------------------------
--
> > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > in the body of a message (not the subject) to
majordomo at lists.diy-efi.org
>
> --
> Steve Ravet
> steve.ravet at arm.com
> ARM,Inc.
> www.arm.com
> --------------------------------------------------------------------------
--
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>
>

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org