727/730 ANHT hiway spark enable

[Bob Valentine]

This is pretty well documented in the archives, also some notes on it in
the '730 tuning document
http://www.diy-efi.org/gmecm/ecm_info/1227730/qanda.html

You're on the right track, what you have below is correct.  Highway spark &
fuel can operate independant of each other, as you can see they each have
their own entry/exit parameters.  

If your scan tool isn't working I wouldn't play with highway yet, you need
to make sure you've got everything right before playing with it and closely
monitor it to make sure you're not going too lean & *loosing* mileage.

-> Bob Valentine
-> bob at tecmark.com


At 10:22 PM 6/29/2001 -0500, you wrote:
>Hello all! The insurance company totalled my '85 vette that was struck
>by lightning last month.. I was going to yank the '870 out of it one day
>and put the '165 in but never got around to it. Now, I jumped right past
>all the '86-'89 MAF stuff and got a 1990 vette! It really runs great.
>It's bone stock right now. My question... I know that the hiway spark
>mph is set to 255 so to enable it I need to lower it to a more
>reasonable speed like 55 or 60mph, right? But I also noticed some other
>things that seem like it'll keep hiway spark from happening. One is the
>min coolant temp for hiway spark advance. In my ANHT bin it is set at
>151C. Do I need to lower this as well? Then there's min rpm for hiway
>spark advance set at 3175rpm. I guess I need to lower that too? Anything
>else I'm missing? 
>
>Oh, and I still haven't been able to get Diacom to link up with this car
>yet! I've tried everything with this stupid Thinkpad. I'm trying to pick
>up a cheap Compaq unit off ebay.. See if that will work for me.
> 
>Thanks!
>Craig M.
> 
>
>----------------------------------------------------------------------------
>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