Re: Timing Jump on 165/TPI System

[Mark Romans <romans@pacbell.net>]

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
> >| >
> >| >
> >|
> >
>