ECM fault?

[Mike Rolica]

Pull it off, stick your finger over the hose... if no different should be
ok,  blow in it see if  it leaks  just like a check valve.
Mike Rolica
EXT. 260
 :-)


	-----Original Message-----
	From:	Akselrud, Boris [SMTP:AkselruB at moodys.com]
	Sent:	Tuesday, November 09, 1999 10:56 AM
	To:	'gmecm at efi332.eng.ohio-state.edu'
	Cc:	'n5xmt at bellsouth.net'
	Subject:	RE: ECM fault?

	It has always been like that since I've got the car 3 years ago (it
was made
	in 1993).

	I am very electronically/microprocessor inclined, however my
experience with
	engine mechanics/functionality is close to 0. It became better,
though, over
	these tree years that I am trying to battle this problem.

	I replaced EGR valve with a new one at some point.

	My brother says there are no vacuum leak, bad PCV valve and he has
been an
	auto mechanic since day 1. However I wish I could check it myself
just to
	make sure. I don't know how. I understand that looking for a vacuum
leak
	which can be anywhere is very difficult task. How do I check PCV
valve?

	Thanks for responding.


	-----Original Message-----
	From: David Cooley [mailto:n5xmt at bellsouth.net]
	Sent: Tuesday, November 09, 1999 9:58 AM
	To: gmecm at efi332.eng.ohio-state.edu
	Subject: RE: ECM fault?


	At 09:29 AM 11/9/1999 -0500, you wrote:
	>O2 output does seem slow when you scope it. We did replace it, but
I am not
	>sure if it was genuine GM.
	>Also I would imagine that right after the replacement while the
sensor was
	>brand new we should have felt at least some change in the idle
character,
	>but there was no change.
	>That's why I am beginning to think that ECM program is causing it
by
	>reacting slowly or over/under compensating the sensor input. Do you
think
	>that it is possible? Of caurse if that's the case, I'll be stuck
trying to
	>reprogram it.

	Did this suddenly start or has it done it since new?
	Could be a leaky EGR valve, vacuum leak, bad PCV valve etc...
	===========================================================
	David Cooley N5XMT Internet: N5XMT at bellsouth.net
	Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
	We are Borg... Prepare to be assimilated!
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