RE: Timing Jump on 165/TPI System

[Mike Rolica <mrolica@meridian-mag.com>]

On big dizzy I belive so.  What does the est module and ecm hook up to on
the distributor
Mike Rolica
Meridian Magnesium Products
Strathroy, Ont 
Ext. 260


	-----Original Message-----
	From:	Mark Romans [SMTP:romans@pacbell.net]
	Sent:	Tuesday, January 11, 2000 4:14 PM
	To:	gmecm@efi332.eng.ohio-state.edu
	Subject:	Re: Timing Jump on 165/TPI System

	Can you replace the module with the msd with the electronic
distributor and
	still have electronic timing control with the ecm?
	-----Original Message-----
	From: Mike Rolica <mrolica@meridian-mag.com>
	To: 'gmecm@efi332.eng.ohio-state.edu'
<gmecm@efi332.eng.ohio-state.edu>
	Date: Tuesday, January 11, 2000 5:59 AM
	Subject: RE: Timing Jump on 165/TPI System


	>Like bruce said try the module.  In the dizzy  For some reason the
modules
	>seem to fry in the dissy with msd and all the time with cranes..
acltully
	>with the msd you can rip out the module and hook the msd straight
to the
	>pickup.  Msd also offers a conversion cap to make large dizzys ext
coil.
	>Mike Rolica
	>Meridian Magnesium Products
	>Strathroy, Ont
	>Ext. 260
	>
	>
	> -----Original Message-----
	> From: Mark Romans [SMTP:romans@pacbell.net]
	> Sent: Tuesday, January 11, 2000 12:39 AM
	> To: gmecm@efi332.eng.ohio-state.edu
	> Subject: Re: Timing Jump on 165/TPI System
	>
	> I've got a MSD6AL, with Accell coil in cap. MSD box is hidden
under
	>the
	> battery box.
	> It stalled on me 3x today.  All at idle or on deceleration.
	>Restarts fine.
	> Mark
	> -----Original Message-----
	> From: Bruce Plecan <nacelp@bright.net>
	> To: gmecm@efi332.eng.ohio-state.edu
	><gmecm@efi332.eng.ohio-state.edu>
	> Date: Monday, January 10, 2000 9:36 PM
	> Subject: Re: Timing Jump on 165/TPI System
	>
	>
	> >Ahh, get a MSD low resistance center bushing, and a good
	>aftermarket coil.
	> >MSD makes a kit for using a remote coil.
	> >  Better yet get a late model small cap distributor, and use a
good
	>coil
	> >with that.
	> >Then might even use a good spark box.
	> >  I know not oem looking then, but worth it, IMHO.
	> >Using a remote coil late dissy, I have 230K miles on the original
	> >module........
	> >Grmpy
	> >
	> >
	> >
	> >| Sorry Bruce:  Forgot to answer, large cap dizzy!
	> >| Mark
	> >| -----Original Message-----
	> >| From: Bruce Plecan <nacelp@bright.net>
	> >| To: gmecm@efi332.eng.ohio-state.edu
	><gmecm@efi332.eng.ohio-state.edu>
	> >| Date: Sunday, January 09, 2000 6:51 PM
	> >| Subject: Re: Timing Jump on 165/TPI System
	> >|
	> >|
	> >| >
	> >| >It usually makes the engine surge wildly, when it applies, on
	>modified
	> >| >engines, even mild surge on stockers.
	> >| >  The mechanics are opening IAC, and adding fuel.  If bad
enough
	>I think
	> >it
	> >| >might move the timing.
	> >| >Grumpy
	> >| >  You might just for grins try uping the BL to a higher number
	>for the
	> >idle
	> >| >stall thing.
	> >| >
	> >| >
	> >| >| I just rechecked and 700 rpm's for both GDF files, stall1
and
	>stall2.
	> >I
	> >| >| wonder if that has something to do with stall saver rpm's?
	> >| >| Next question, what specifically does stall saver do?
	> >| >| Mark
	> >| >
	> >| >| From: Bruce Plecan <nacelp@bright.net>
	> >| >| Subject: Re: Timing Jump on 165/TPI System
	> >| >| >| Hey Bruce: If I disconnect my est connector, should I see
	>the
	> >advance
	> >| >at
	> >| >| >| 2500 rpm?
	> >| >| >Yes
	> >| >| >| I am wondering if this is why I have the idle problem.
	>Remember
	> how
	> >| >the
	> >| >| >| signal goes to zero advance?
	> >| >| >As I recall it did that during the stall and it was right
at
	>400 rpm,
	> >| >which
	> >| >| >is when the ecm drops out of bypass, and it would read 0 as
I
	> >understand
	> >| >| >things.
	> >| >| >The only failure I've personnally had or diagnosed with a
gm
	>module
	> is
	> >| >hot
	> >| >| >stalling, and progressing to where the engine needs to cool
	>before it
	> >| >would
	> >| >| >restart.
	> >| >| >BTW, is yours a large or small cap Dissy
	> >| >| >Bruce
	> >| >| >| Mark
	> >| >| >| From: John T. Martin <gmman@eskimo.com>
	> >| >| >| Subject: Re: Timing Jump on 165/TPI System
	> >| >| >| >My  $.02
	> >| >| >| >That is a normal condition, also a test for P/U coil
	>signal
	> >strength.
	> >| >| The
	> >| >| >| >advance is triggered by the P/U coil signal amplitude,
not
	>RPM. It
	> >is
	> >| >a
	> >| >| >| back
	> >| >| >| >up as I understand it, but a good test if you suspect a
	>weak
	> magnet
	> >| in
	> >| >| >the
	> >| >| >| >dist. We had a run of K engines with shaft problems a
	>while back
	> >and
	> >| >in
	> >| >| >| >bypass (est disconnected), 2500 rpm the advance was not
	>triggered.
	> >| >Also
	> >| >| >the
	> >| >| >| >weak pick-up signal affects idle quality.
	> >| >| >| >Subject: Timing Jump on 165/TPI System
	> >| >| >| >A question:
	> >| >| >| >With timing control connector disconnected (ie. setting
	>timing on
	> a
	> >| >| >| >165-based TPI motor), timing should sit still, which it
	>does for
	> me
	> >| at
	> >| >| >low
	> >| >| >| >RPM. However, when I idle it on up to say 2000 or 2500,
it
	>seems
	> to
	> >| >| >advance
	> >| >| >| >like 12 degrees or so, instantaneously, and hold up
there
	>until I
	> >| idle
	> >| >| it
	> >| >| >| >back down. Then it jump-returns to the previous value.
	>This is all
	> >| >| >| >timing-light based. Any thoughts on what is being seen?
	>There's
	> >about
	> >| >a
	> >| >| >1-3
	> >| >| >| >degree drift on idle-up, probably from timing chain
	>stretch, but
	> >| >that's
	> >| >| >not
	> >| >| >| >huge.
	> >| >| >| >Anyways, fishing for thoughts. It's not problematic,
just
	>would
	> >like
	> >| >to
	> >| >| >| >understand what's happening and why.
	> >| >| >| >Sincerely,
	> >| >| >| >Craig
	> >| >
	> >| >
	> >|
	> >
	>