Programming 101

Jason Weir jweir at worldnet.att.net
Tue Aug 25 03:52:33 GMT 1998


Bruce Plecan wrote:

> If you want to maximise the ecm's control of idle then use the info.
> Carl shared the other day, and using an entry of 05 at $2A0, and
> 00 at $2A1, will work just fine, for rpm entries

Ok,0x2a0 is RPM open loop off, why change my current value of 28 to 05
what's the conversion factor I don't think I need to lower the rpm at
which it goes open loop, I would think you would go to ff, theoretically
you never want closed loop off?
0x2a1 is RPM open loop on, good, current value of 00 expected, I suppose
that means that it tries to go open loop as soon as the O2 sensor it hot
and TPS is right no matter what the RPM is

> But, how do you shut off that darn EGR when doing initial
> calibrations.
> Well, that is a chore, but setting $1BF to 00, $1B8 to FD, and $1B9 to
> FF
> will do very nicely thank you very much.

So are you saying that turning off the EGR flag isn't good enough, what
exactly are these addresses? 0x1bf, 0x1b8 and 0x1b9.  RPM EGR enable,
TPS EGR off, RPM EGR off???
How about 0x29e MPH enable for closed loop, I have no VSS so should be
00, right. And 0x29f TPS enable for closed loop, should be a little
lower than what my TPS at idle is at operating temperature, right?

I still am missing lots of pieces of the puzzle but without a doubt its
a picture of me in a straight jacket, thanks,


--
Jason Weir
88 Wrangler - 258 Chevy TBI
Fayetteville, North Carolina
http://home.att.net/~jweir/tbi/inject.htm  --- TBI Installation Page
http://home.att.net/~jweir/resume.htm      --- My Resume
mailto:jweir at worldnet.att.net





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