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<DIV><FONT face="Palatino Linotype" color=#000080 size=4>Now I know
<EM>THREE</EM> people with ECM problems!</FONT></DIV>
<DIV><FONT face="Palatino Linotype" color=#000080 size=4></FONT> </DIV>
<DIV><FONT face="Palatino Linotype" color=#000080 size=4>Happy daze!! It
only took a decade or so....
<HR>
</FONT></DIV>
<DIV><FONT face="Palatino Linotype" color=#000080 size=4></FONT> </DIV>
<DIV style="FONT: 10pt arial">----- Original Message -----
<DIV style="BACKGROUND: #e4e4e4; font-color: black"><B>From:</B> <A
title=eqs@frontiernet.net
href="mailto:eqs@frontiernet.net">eqs@frontiernet.net</A> </DIV>
<DIV><B>To:</B> <A title=seravilo@netzero.net
href="mailto:seravilo@netzero.net">DOlivares</A> </DIV>
<DIV><B>Cc:</B> <A title=bullyhart@aol.com
href="mailto:bullyhart@aol.com">bullyhart@aol.com</A> ; <A
title=leroy@sunflower.com
href="mailto:leroy@sunflower.com">leroy@sunflower.com</A> ; <A
title=syty@syty.org href="mailto:syty@syty.org">syty@syty.org</A> </DIV>
<DIV><B>Sent:</B> Friday, February 03, 2006 2:49 PM</DIV>
<DIV><B>Subject:</B> Re: STILL [Syty] Broke & Stumped!</DIV></DIV>
<DIV><BR></DIV><BR>When I bought my GN the car would not start. The previous
owner sold it <BR>to me for a low price with 24K on the clock. I diagnosed the
problem to <BR>be the ECM. A trip to the parts yard gave me a used ECM for $50.
The <BR>car started right up after it's replacement.<BR><BR>Quoting DOlivares
<<A
href="mailto:seravilo@netzero.net">seravilo@netzero.net</A>>:<BR><BR>> And
I never had a bad ECM in my life-- or knew anyone else who did!<BR>> Clean
living paying off...? What does that say about YOU? ...must <BR>>
not be wearing your anti-ESD straps... or rubbers... or something <BR>>
equally disastrous....<BR>><BR>> I wouldn't trust anything more complex
than a cruise-control unit <BR>> from a junkyard either... no bargain in the
short run.<BR>><BR>> I also know a little more than you suspect about
MEMCALs, etc. It's <BR>> the FAILURES I'm unacquainted
with!<BR>><BR>> D.O.<BR>>
--------------------------------------------------------------------------------<BR>><BR>>
----- Original Message -----<BR>> From: <A
href="mailto:bullyhart@aol.com">bullyhart@aol.com</A><BR>> To: <A
href="mailto:seravilo@netzero.net">seravilo@netzero.net</A> ; <A
href="mailto:leroy@sunflower.com">leroy@sunflower.com</A><BR>> Cc: <A
href="mailto:syty@syty.org">syty@syty.org</A><BR>> Sent: Thursday, February
02, 2006 1:39 PM<BR>> Subject: Re: STILL [Syty] Broke &
Stumped!<BR>><BR>><BR>> ECMs = 40 bucks at most boneyards in San
Antonio.<BR>><BR>> ECM is the motherboard that is housed in the silver
case. The memcal <BR>> is what you have been replacing (10-1 todd chip
to Stock and back) by <BR>> removing the access panel and popping it
out.<BR>><BR>> I have 3 ECMs in my garage that are hosed, and one that is
good. ECM <BR>> problems were actually somewhat common and addressed by
GM at various <BR>> points during the 7749 production cycle.<BR>>
Daron<BR>><BR>> -----Original Message-----<BR>> From: DOlivares <<A
href="mailto:seravilo@netzero.net">seravilo@netzero.net</A>><BR>> To: Jim
Sloan <<A
href="mailto:leroy@sunflower.com">leroy@sunflower.com</A>><BR>> Cc: <A
href="mailto:syty@syty.org">syty@syty.org</A><BR>> Sent: Thu, 2 Feb 2006
10:01:11 -0600<BR>> Subject: STILL [Syty] Broke &
Stumped!<BR>><BR>><BR>> Jim,<BR>><BR>> When you
say you keep around a "Spare ECM," do you mean the <BR>> plug-ins or the
whole ECM Box? Based on my latest tests, the FI <BR>> Drivers-- and
whatever controls them-- are being victimized by either <BR>> a thermal or a
timing (delay) problem. I understand how SEUs can <BR>> screw up chips
IN SPACE or other rad-hostile environments, but I <BR>> kinda figured I was
safe from all that junk in my car! I wonder who <BR>> sent that cosmic
ray my way...?<BR>><BR>> I took out the 10-n-1 Interface
yesterday but things are really no <BR>> better. The Injectors
batch-pulse fine then weakly at unpredictable <BR>> times and for durations
up to 30 seconds until I reach full-warm-up <BR>> after about 7 minutes,
depending on ambient air-temp. Sunday, the <BR>> thing actually started
pooping out (choking and sputtering but <BR>> throwing nothing more than a
Code 44, which is practically useless <BR>> information!) on the expressway
at 70mph... long after I was well <BR>> into warm, closed-loopery. This
thing is getting REALLY BAD and, as <BR>> admitted before, I don't really
know what to do about it! I can't <BR>> even take it to a garage or
even the dealer! They know less than I <BR>> do and will only pull all
my goodies and restore me to overpriced NOS <BR>> crap for well over a
THOU$AND! Do you know where I can get a new <BR>> ECM... CHEAP?
Know anybody who reconditions old ECMs? Electrodyne <BR>> or Spearco or
somone like that had a "E6" plug-compatible ECM which <BR>> was
PC-programmable, but I forgot all the details... maybe this is <BR>> the time
to go the DFI route once and for all...? Unfortunately, <BR>> neither
my wallet or my temperament are willing to part with all that <BR>> Delco
firmware just yet.<BR>><BR>> In a few hours, I'm gonna
gut the whole ECM out of my <BR>> still-on-jackstands Typhoon and do more
swap-in tests on the Old <BR>> Horse #773. IF that solves my problem--
and I still have profound <BR>> reservations-- I'll still need to do
something in the way of <BR>> rehabilitating my old MEMCAL or ECM-- not to
mention the 10-n-1 <BR>> upgrade I want to eventually put
back.<BR>><BR>> Any thoughts?<BR>><BR>> D.O.<BR>>
--------------------------------------------------------------------------------<BR>><BR>>
----- Original Message -----<BR>> From: DOlivares<BR>> To: Jim Sloan ; <A
href="mailto:syty@syty.org">syty@syty.org</A><BR>> Sent: Monday, January 02,
2006 12:06 PM<BR>> Subject: Re: [Syty] Broke &
Stumped!<BR>><BR>><BR>> Thanks... so far, and happy New Year... et pax
hominibus boni voluntatis!<BR>> [You know who you are.]<BR>><BR>>
Unfortunately, I have tried all those diagnostic trees-- even a <BR>> couple
of bushes for good measure! This episode has been going on <BR>> for
nearly a month. As I said, I'm running out of hardware to <BR>>
swap-out. The only things I haven't diddled with is the EST Module
<BR>> in the Distributor and of course the ECM/chip.<BR>><BR>> The
reason I haven't fooled with those things is that the misbehavior <BR>>
complained of is SO PREDICTABLE and only afflicts COLD-START-UP <BR>>
conditions, except when it's really cold outside in which case I will <BR>>
get precisely ONE chug-a-lug spasm about 5 minutes into the run-up to <BR>>
full operating temperature... just after everything had been going <BR>> just
fine. That's the worst of it... as far as I can tell without a <BR>>
scantool... seat-of-the-pants power and smoothness is better than <BR>> ever,
otherwise. This is no "intermittent." This is pure <BR>>
predictability! And my experience with bad chips and modules is that
<BR>> they either fail outright or exhibit sporadic, random upsets...
<BR>> before failing outright. That's not what's occurring. Even
so, I <BR>> might drop in my spare EST (Holley Annihilator) just for
laughs....<BR>><BR>> Keep thinking... what else could it be???
What's the connection to <BR>> cold/cool ambient temperature?<BR>><BR>>
D.O.<BR>>
--------------------------------------------------------------------------------<BR>><BR>>
----- Original Message -----<BR>> From: Jim Sloan<BR>> To: 'DOlivares' ;
<A href="mailto:syty@syty.org">syty@syty.org</A><BR>> Sent: Monday, January
02, 2006 8:11 AM<BR>> Subject: RE: [Syty] Broke &
Stumped!<BR>><BR>><BR>> Happy New Year Dennis!<BR>><BR>> I've had
hardware problems with several of the 10-1 adapters. You <BR>> could
swap back to the stock memcal (and map sensor) to rule that <BR>> out, if
your build isn't too radical.<BR>><BR>> I usually keep at least one spare
ecm for a substitution test, and <BR>> have seen quite a few fail in weird
ways. Let me know if you need <BR>> one.<BR>><BR>> Sometimes it
helps to go back to the basics, and follow the <BR>> diagnostics in the
service manual <A
href="http://syty.org/old/d&e-code44.html">http://syty.org/old/d&e-code44.html</A>
<BR>> .<BR>><BR>> Just a few ideas, if you haven't already tried
them.<BR>><BR>> Jim<BR>><BR>><BR>><BR>>
------------------------------------------------------------------------------<BR>>
From: <A href="mailto:syty-bounces@syty.org">syty-bounces@syty.org</A>
[mailto:syty-bounces@syty.org] On Behalf <BR>> Of DOlivares<BR>>
Sent: Sunday, January 01, 2006 7:36 PM<BR>> To: <A
href="mailto:syty@syty.org">syty@syty.org</A><BR>> Subject: [Syty]
Broke & Stumped!<BR>> Importance:
High<BR>><BR>><BR>> Who watches The
Watcher?<BR>><BR>> Who advises The Guru?<BR>><BR>> Who
assists The Good Samaritan?<BR>><BR>> I think we're about to find
out pretty soon-- at least until I can <BR>> get my Lapdog running again (and
one of the diagnostic programs to <BR>> troubleshoot my li'l
pony):<BR>><BR>> Meanwhile, I NEED HELP! With my laptop in
pieces all over the <BR>> bench, I can't run DIACOM or DATALINK to give me
clues about the <BR>> usual suspects:<BR>><BR>> Clean-livin'
doesn't always pay off if my holidaze so far are any <BR>> indication.
I spent Christmas Eve on a carlift taking apart my <BR>> right-front axle--
again!-- after being assured by our local <BR>> "Gear-Guru" (who fully
rebuilt that differential less than 6 months <BR>> before I started hearing
that same CLUNKING on left turns again) that <BR>> all I needed was a new
cir-clip (GM #14041989) to keep the axle from <BR>> popping-out of the
side-gear in the differential. HAH! More bad <BR>> advice and I
ended up taking a cab home.... More about that Horror <BR>> Show in a
later mailing.<BR>><BR>> Meanwhile, we got our first technical
freeze down here in what was <BR>> becoming tropical San Antone on Nov. 17th
and our first hard-freeze, <BR>> appropriately, on Dec. 7th, and somewhere in
between those times ol' <BR>> Syclone #773 began throwing fits during
start-up and for the first 5 <BR>> or 6 minutes until the water jacket hits
and stays at 180° or so. <BR>> I'm stumped for the first time in a
decade or more! Here's what <BR>> happens:<BR>><BR>> Since
the new Walbro fuel-pump went in a few months ago, cranking <BR>> times are
way down... engine catches pretty quick, but now it won't <BR>> stay lit and
"choke" with the new IAC, which went in along with a new <BR>> TPS and
remote-adjustable FPR about a month before the new Walbro. <BR>> Now, I
have to feather the pedal once the ignition gets going and <BR>> hold the
throttle open a bit while the IAC hunts for about a dozen <BR>> cycles making
the tach swing about 1200 rpm back and forth until we <BR>> hit the "sweet
spot" and the engine takes off smoothly and the <BR>> IAC-hunting stops, at
least for a while. Now, it's safe to put her <BR>> in gear and drive
away as long as I keep a little positive bias in <BR>> the pedal for the next
few minutes every time I have to slow down to <BR>> an idle or coast
speed.<BR>><BR>> THIS PROBLEM IS WICKEDLY WORSE ON COLD DAYS, where
ambient air is in <BR>> the 40s or below, which thankfully is rare.
(Ain't this <BR>> global-warming great!) However, on a couple of
occasions when I did <BR>> have to drive in the 30s-- and even after reaching
full-warm-up <BR>> temperature-- the engine starts cutting out seriously as
the SES <BR>> light comes on! Now, we're talking some MAJOR pumping of
the pedal <BR>> to keep things lit and if I can get on a clear piece of road
and <BR>> cruise a spell at 35 mph or better the problem goes away
completely, <BR>> until I shutdown and the engine gets cold again. I
barely even <BR>> recognize that SES light... hardly ever see it.
Driving on warmer <BR>> days never sees a recurrence of that mid-period
cutting-out, and idle <BR>> is smooth as is the rest of drivability.
Warm start-ups see a few <BR>> moments of that IAC-hunting, but the
rpm-sweeps are only on the order <BR>> of 500rpm and the whole anomaly goes
away in about 30 seconds. I've <BR>> NEVER encountered anything like
this in my many years of wrenching! <BR>> Now, it's time for some
wretching!! All that ever gets logged in the <BR>> way of a
trouble-code is 44... not too helpful!<BR>><BR>> Naturally, I
replaced the O2 sensor-- no improvement at all! <BR>> Everything
described above instinctually told me this was a weird <BR>> thermal
transient in the injector-drive circuits or else the MAT, CTS <BR>> or MAP I
replaced (for the hell of it) 3 years ago needed to be <BR>> switched
again. So I did... one at a time to see if I could <BR>> fault-locate
the culprit that way. No dice! I'm running out of <BR>> hardware
to replace! I've even tried setting that 10-to-1 Chip to <BR>>
different settings, but the same nasty behavior persists-- the <BR>> engine's
as well as my own!<BR>><BR>> WHO CAN TELL ME WHAT MY PROBLEM(S)
IS? Be nice, now....<BR>><BR>> Dennis
O.<BR>><BR>><BR>>
--------------------------------------------------------------------------------<BR>><BR>>
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