Haltech/igniton issues,combat together to make one BIG issue

[Dan Zorde]

Kris,

I had this problem with my ecu (not a Haltech though, but exact same
problem), the signal was too large and ringy for the filtering in the ecu,
so it was double and triple triggering on every pulse.  A 10K may work but
its pretty crude.  Use something like 0.1uF cap (greencap) in series with
the signal, then feed it into a 10K/10K voltage divider, this fixed my
system.

                  0.1u                10K
In -----------II------------^^^^^^^--------I--------------- Out
                    I
                    I
                    >
                    >  10K
                    >
                    I
                    I
                           Gnd

You may want to put a cro probe on the coil signal to see what it looks
like before and after the filter.

Dan  dzorde at erggroup.com



<Date: Tue, 27 Feb 2001 01:21:16 -0800
<From: "Kris Weldy" <volvo4life at home.com>
<Subject: Re: Haltech/igniton issues,combat together to make one BIG issue.
<
<I called Bob Norwood as he seemed to be of more help than the haltech
office
<here in Dallas(they just tell me -"oh its your plug wires" then dismiss
the
<whole thing),and Bob said that the His experience was that  the haltech
was
<really sensitive to interference(rf and so forth) and to keep the tach
wire
<that goes from the coil-to the haltech away from all other wires as much
as
<possible.I tried this and it didnt work.Maybe the 10 k resistor will
<work,where do i find one and where do i put it,as i cant get a tach signal
<from anywhere else,but my coil.Thanks very much for the info,Thanks Timo
for
<your reply!Where are you from?
<Thanks again.
<- --
<Kris Weldy (AIM: VolvoFam3)
<Arlington, TX
<'87 760ti, 20psi w/B23FT, TO3/04E turbo, many mods



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