scan tools and WOT

[Bruce Plecan]

-----Original Message-----
From: Stuart Bunning <stuart at kenelec.com.au>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Tuesday, October 13, 1998 10:14 PM
Subject: scan tools and WOT


>I have read somewhere when you hook up a DELCO ECM to a scan tool
>when using a 808 for example 160 Baud ALDL. with the engine running you
>should not give it WOT or drive it with anything other then a very light
>foot on the gas. The only reason why i can see this being a problem is that
>apparently in ALDL mode it puts the ECM into a fixed degrees BTDC timing
>valus and ignos the MAP for altering timing  ??

Sort of.  But, bottom link don't drive the car in ALDL, right.

 This would render scan tools
>to useless to anything other then idle and light cruise.
>Now this may vary with different model ECM's and memcals but I think it is
>the case with the 160 Baud 808 ECM' s in australia.
>Best Regards,
>STUART BUNNING


You've got ALDL, Diagnostic, Normal, and System Back-up.
For home mechanic use,  just use Normal, and learn what all is
avalable, to use..  Once you have a grasp of that then the others
will make more sense.  I'm still at Normal, and just work with that.
After a couple hundred hours of one eye driving it will get easier.
one eye on the scanner, one eye on the road.  Makes the drive
to/from work more interesting.  Once you become one with the
scanner and your car, all the little blips get real apparent.
Cheers
Bruce          For you folks like Doc, Please keep both eyes on
                    the road.  He has to keep one hand free to keep
                    his Cone Shaped Hat out of his line of vision