Re: Timing Jump on 165/TPI System

["Bruce Plecan" <nacelp@bright.net>]

AND TONIGHT'S Winner of the CSH,  IS, tadaaa

******Just glad to hear ya figured it out*****

Ya wanna work on some of mine now  <g>...
B

----- Original Message -----
From: Mark Romans <romans@pacbell.net>
To: <gmecm@efi332.eng.ohio-state.edu>
Sent: Sunday, January 16, 2000 7:46 PM
Subject: Re: Timing Jump on 165/TPI System


| Well Bruce:  Your gonna love this.  Apparently I was causing my own
problem.
| Originally when I had a stalling problem I set the stall saver parms the
| same % higher as I had raised the idle speed.  Shortly therafter I found
the
| hwy spark was being enabled and was causing the main problem.  I never
reset
| the stall saver parms back to stock.  I just did that and now the ecm
isn't
| retarding the spark at 725 rpm's it's back to stock which is 400 rpm's.
| There are about 5 parms that are included in the stall saver section and I
| just set them all back to stock and I can slip the clutch with the park
| brake set without stalling the engine.
| Mark
| -----Original Message-----
| From: Bruce Plecan <nacelp@bright.net>
| To: gmecm@efi332.eng.ohio-state.edu <gmecm@efi332.eng.ohio-state.edu>
| Date: Tuesday, January 11, 2000 2:23 PM
| 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?
| >
| >No, you can triggger a MSD with an electronic dissy, but the dissy needs
to
| >have Vac/mech..
| >Grumpy
| >
| >| 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
| >| > >| >
| >| > >| >
| >| > >|
| >| > >
| >| >
| >|
| >
|