weak spark on 10v turbo (still not fixed)

[Todd Phenneger]

Ok,
  Now I'm really getting frustrated.  I put in a known good
coil.  I STILL get a weak spark at the plugs.  Whats up.  I can
possibly have 5-bad plugs.  (they are all brand new, maybe 100
miles)  So, what could be causing this.  Again, even if I hook
up my rover to the Jumper Post and Engine block to boost
current/voltage a bit to a consistant 12v its still a problem.
  Also, when cranking the spark seems to be somewhat
intermittent, and occasionally I'll get one good strong spark
when I release the key.  Wierd.  
 Thanks
    Todd

--- Todd Phenneger <tquattroguy at yahoo.com> wrote:
> Jim,
>   I agree,Glad to know you have a similar feeling.
>   That was going to be my next thing to try replacing just
> through simple reduction of possibilities.  If its not A,B,C,D
> or E then it must be (F) right.  Of course it could be G,H,I,J
> or any other number of things.
>   Hmmm, Maybe the new coil will help my missing cyl at idle
> problem.  ITs been driving me nuts and very intermittent.  
> Thanks for all the replies.
>   Todd
> 
> 
> --- Jim Green <jeg1976 at yahoo.com> wrote:
> > 
> > --- Todd Phenneger <tquattroguy at yahoo.com> wrote:
> > > Heya everyone,
> > >   I have a problem with the 4ktq "again".  I HATE
> > > CIS!  The
> > > engien is a 5kt engine, all functions are the same
> > > as the MC
> > > Engine even though my KH is a little different.
> > > Car ran fine when I parked it but had a stumble on
> > > throttle tip
> > > in from idle.
> > >   Go to move the car to the Garage.  NO Start.  Had
> > > been parked
> > > 1-2 weeks.  I have spark and Fuel.  Pulling the
> > > plugs yield
> > > fouled plugs and damp piston tops.
> > >   After much troubleshooting I have narrowed it
> > > unoficially to a
> > > WEAK SPARK.  By that I mean the spark seems visibly
> > > weak at the
> > > plugs.  Even at night its hard to see the spark.  I
> > > have tried
> > > swapping known good Plug Wires, Cap, Rotor in and
> > > the plugs are
> > > brand new.  I do get a significant voltage drop at
> > > the gauge
> > > when cranking and a large spike in resistance across
> > > the power
> > > wire from battery to starter when cranking. 
> > > HOwever, hooking up
> > > my Rover via Jumpers to the Power-Dist block in the
> > > Engine
> > > Compartment (Battery is in Trunk) and grounding to
> > > block fixed
> > > this drop and I still have the same issues.  
> > >   Next logical step to me is to try a Known Good
> > > Coil. 
> > 
> > Sounds like a coil to me.  I've fried a few of them,
> > each one goes in a different way.  You might also look
> > at your starter.  Mine's starting to go bad and
> > actually pulls my voltage down low enough in the cold
> > to reset the stations on my radio if my battery is a
> > little weak.  You might try a different starter to.
> > 
> > HTH,
> > 
> > =====
> > Jim Green
> > '89 80q slow
> > '89 90tq fast, really fast
> > http://www.mswanson.com/~jgreen/car_home.html
> > 
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