[DeTomaso] Coil wire sparking to a rubber heater hose!

Rob Dumoulin rob at dumoulins.net
Mon Mar 28 23:34:14 EDT 2016 

I remember when diagnosing such a thing was as easy as hearing the arc
screw up your AM radio playing Ted Nugent. Makes you want to fix it real
quick like back then.

In college, I drove a 240z with points that would lose ignition at the most
inconvenient times. One evening on a date it left me stranded taking a
short cut through Tallahassee's French town at 1 AM.  That was probably the
worst place to break down in Tally. I had the date turn over the engine
with the cap off to see if the points were sparking. Come to find there was
a wire going to the points that was arcing. Moved the wire, got the hell
out of there, and permanently fixed that issue the next day. I guess other
thing can motivate equally.
On Mar 28, 2016 3:51 PM, "Mike Drew via DeTomaso" <detomaso at poca.com> wrote:

> No, you can see in the video everything was seated properly. There was
> just enough of a gap between the ID of the rubber boot and the OD of the
> wire that the spark was finding its way past.
>
> It's now very isolated--nothing within several inches in all directions.
> It was simple to disconnect and reroute the heater hoses which had the
> secondary benefit of making the cutoff valves much easier to access from
> above.
>
>
>
>
> Mike
>
> Sent from my iPhone
>
> On Mar 28, 2016, at 9:35, Dave <davel at emspace.com> wrote:
>
> > But wait Mike.
> > You should be able to run a good coil wire past about anything???
> > Was the distributor end of the coil wire not making contact?
> > dave
> >
> >
> > On 3/28/2016 11:17 AM, Mike Drew via DeTomaso wrote:
> >> Hi guys,
> >>
> >> Lori's Pantera has a new Dan Jones/Dave McLain engine and it runs
> exceptionally well--above 2000 rpm. But between 1000 and 2000 rpm it
> stumbles and craps all over itself. Today I decided to troubleshoot it with
> Garry Choate. I thought it was an ignition issue and I was right. But who
> would have thought that it would be sparks jumping from the coil wire to a
> rubber hose!!!!???
> >>
> >> http://youtu.be/jjQijQ6Q0ms
> >>
> >> Above 2000 rpm the sparks flow through the wire. Below that, they arc
> to the hose instead, enough so that it killed the motor.
> >>
> >> Re crimping the wire and routing the hoses differently will fix it.
> >>
> >> Who woulda thunk it?
> >>
> >> Mike
> >>
> >> Sent from my iPhone
> >> _______________________________________________
> >>
> >> Detomaso Forum Managed by POCA
> >> Posted emails must not exceed 1.5 Megabytes
> >> DeTomaso mailing list
> >> DeTomaso at poca.com
> >> http://poca.com/mailman/listinfo/detomaso_poca.com
> >>
> >> To manage your subscription (change email address, unsubscribe, etc.)
> use the links above.
> >
> >
> > _______________________________________________
> >
> > Detomaso Forum Managed by POCA
> > Posted emails must not exceed 1.5 Megabytes
> > DeTomaso mailing list
> > DeTomaso at poca.com
> > http://poca.com/mailman/listinfo/detomaso_poca.com
> >
> > To manage your subscription (change email address, unsubscribe, etc.)
> use the links above.
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
> DeTomaso at poca.com
> http://poca.com/mailman/listinfo/detomaso_poca.com
>
> To manage your subscription (change email address, unsubscribe, etc.) use
> the links above.
>
>
-------------- next part --------------
   I remember when diagnosing such a thing was as easy as hearing the arc
   screw up your AM radio playing Ted Nugent. Makes you want to fix it
   real quick like back then.

   In college, I drove a 240z with points that would lose ignition at the
   most inconvenient times. One evening on a date it left me stranded
   taking a short cut through Tallahassee's French town at 1 AM.A  That
   was probably the worst place to break down in Tally. I had the date
   turn over the engine with the cap off to see if the points were
   sparking. Come to find there was a wire going to the points that was
   arcing. Moved the wire, got the hell out of there, and permanently
   fixed that issue the next day. I guess other thing can motivate
   equally.

   On Mar 28, 2016 3:51 PM, "Mike Drew via DeTomaso"
   <[1]detomaso at poca.com> wrote:

     No, you can see in the video everything was seated properly. There
     was just enough of a gap between the ID of the rubber boot and the
     OD of the wire that the spark was finding its way past.
     It's now very isolated--nothing within several inches in all
     directions. It was simple to disconnect and reroute the heater hoses
     which had the secondary benefit of making the cutoff valves much
     easier to access from above.
     Mike
     Sent from my iPhone
     On Mar 28, 2016, at 9:35, Dave <[2]davel at emspace.com> wrote:
     > But wait Mike.
     > You should be able to run a good coil wire past about anything???
     > Was the distributor end of the coil wire not making contact?
     > dave
     >
     >
     > On 3/28/2016 11:17 AM, Mike Drew via DeTomaso wrote:
     >> Hi guys,
     >>
     >> Lori's Pantera has a new Dan Jones/Dave McLain engine and it runs
     exceptionally well--above 2000 rpm. But between 1000 and 2000 rpm it
     stumbles and craps all over itself. Today I decided to troubleshoot
     it with Garry Choate. I thought it was an ignition issue and I was
     right. But who would have thought that it would be sparks jumping
     from the coil wire to a rubber hose!!!!???
     >>
     >> [3]http://youtu.be/jjQijQ6Q0ms
     >>
     >> Above 2000 rpm the sparks flow through the wire. Below that, they
     arc to the hose instead, enough so that it killed the motor.
     >>
     >> Re crimping the wire and routing the hoses differently will fix
     it.
     >>
     >> Who woulda thunk it?
     >>
     >> Mike
     >>
     >> Sent from my iPhone
     >> _______________________________________________
     >>
     >> Detomaso Forum Managed by POCA
     >> Posted emails must not exceed 1.5 Megabytes
     >> DeTomaso mailing list
     >> [4]DeTomaso at poca.com
     >> [5]http://poca.com/mailman/listinfo/detomaso_poca.com
     >>
     >> To manage your subscription (change email address, unsubscribe,
     etc.) use the links above.
     >
     >
     > _______________________________________________
     >
     > Detomaso Forum Managed by POCA
     > Posted emails must not exceed 1.5 Megabytes
     > DeTomaso mailing list
     > [6]DeTomaso at poca.com
     > [7]http://poca.com/mailman/listinfo/detomaso_poca.com
     >
     > To manage your subscription (change email address, unsubscribe,
     etc.) use the links above.
     _______________________________________________
     Detomaso Forum Managed by POCA
     Posted emails must not exceed 1.5 Megabytes
     DeTomaso mailing list
     [8]DeTomaso at poca.com
     [9]http://poca.com/mailman/listinfo/detomaso_poca.com
     To manage your subscription (change email address, unsubscribe,
     etc.) use the links above.

References

   1. mailto:detomaso at poca.com
   2. mailto:davel at emspace.com
   3. http://youtu.be/jjQijQ6Q0ms
   4. mailto:DeTomaso at poca.com
   5. http://poca.com/mailman/listinfo/detomaso_poca.com
   6. mailto:DeTomaso at poca.com
   7. http://poca.com/mailman/listinfo/detomaso_poca.com
   8. mailto:DeTomaso at poca.com
   9. http://poca.com/mailman/listinfo/detomaso_poca.com

More information about the DeTomaso mailing list