[Shotimes] More on my issue

[Paul Nimz]

I had a bad miss and a tach reading 1/3 low at one time.  It was the power
plug going to the coil not seated correctly due to the rubber weather seal.

Paul Nimz
'97 TR
'93 EG mtx



----- Original Message ----- 
From: <james@dhlake.com>
To: <shotimes@autox.team.net>
Sent: Wednesday, July 02, 2003 9:01 AM
Subject: Re: [Shotimes] More on my issue


> I checked it this morning and I get Vbatt on each coil line
> with both engine off and running, just for a test I checked AC
> voltage while the engine was running, I got a steady voltage on
> 2 of the connections of around 2.2 and the third wouldn't steady down
> is that a sign of bad drivers?  Is the solution Replace DIS module?
> I feel that I am almost to a running SHO again.
>
> On Tue, Jul 01, 2003 at 09:00:31PM -0500, Steve Weinrich wrote:
> > Yes, a coil fault can cause a tach that reads 1/3 low.
> >
> > The TACH signal (IDM) is a summation of hte three coil drive signals.
If
> > there is a fault such that the circuit for one of the coils was open or
if
> > the output driver in the DIS was defective, you would get this symptom.
> >
> > You can check for an open coil/connection by unplugging the DIS
connector
> > that feeds the coil anf look for Vbatt (Ignition ON) at each of the
three
> > wires.  This will detect a gross open.
> >
> > Steve
> > ----- Original Message -----
> > From: <james@dhlake.com>
> > To: <shotimes@autox.team.net>
> > Sent: Tuesday, July 01, 2003 12:46 PM
> > Subject: [Shotimes] More on my issue
> >
> >
> > > I think my problem has been ignition related all along.
> > > I forgot a symptom to add.
> > >
> > > symptoms:
> > > 217 code in persistant
> > > tach reads approx 1/3 low
> > > cylinders 2 and 6 come up in dropout test
> > >
> > > All my O2 sensor issues seem to be caused by the ignition
> > > dropout.
> > >
> > > Is there anyway to test the DIS module?
> > >
> > > Now that the problem is back I will re-check the coil
> > > primary side, but could a coil issue cause the tach to drop?
> > >
> > > Another possible interesting fact, one spark plug blew out
> > > of the engine and I limped home on 4 cyl about 1 month before the
> > > problem started.  The Ceramic blew out of the metal part, it was odd.
> > >
> > > James
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