teknickle difikulty

[Mike Rolica]

Will still adv if rpm is too high... goes into lim mode when you unlug the
connector... I belive you have two adv settings....
When mine was on dyno... it would be at 6deg at idle(600 rpm), when I reved
it up, it whent to about 28-30 deg.....
Mike Rolica
Plant A,
Magnesium Products Division
Strathroy

(519)-245-4040  Ext. 244



	-----Original Message-----
	From:	Carl Summers [SMTP:InTech at writeme.com]
	Sent:	Friday, August 18, 2000 1:40 AM
	To:	gmecm at diy-efi.org
	Subject:	teknickle difikulty

	Hi All,
	     Working on a 94 Chev Pu here with Blower and TBI, 7427
4l60E....has
	been running well for about 4 years...Runs really poor now...I start
with
	the basics and check timing and fuel pressure....fuel pressure is
good but
	timing is 22degrees with est plug disconnected(should be 0)....so I
attempt
	to move it back and it doesn't like it...dies every time....I notice
on the
	diacom that the IAC counts down to 0 AND the diacom shows 22 degrees
advance
	with the EST unplugged....hmmmm....unhook the IAC motor and hook up
my IAC
	tester/driver and close the IAC completely and engine still idles at
	800.....anyway bottom line on the iac stuff is I have a vacuum leak
between
	the blower and the intake manifold...My question is: Have any of you
seen a
	spot in the code that increases timing back to what is in the table
if IAC
	will not lower the rpm enough???? Kinda seems backwards....I was
thinking I
	had a bad ecm at first since I had an IAC code, EST code and some
	others....The timing with and without the EST wire plugged in always
matches
	what the diacom says so seems as if all is well with the ECM....Oh
well just
	checking with Y'all if you have seen this before....ttyl
	-Calr Summers

	
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