Re: [DML] Re: Probs with fuel pump & RPM relay

["DMC Joe" <dmcjoe@xxxx>]

John

Your statement is incorrect; you said:
"My 2 cents is: the coil he is talking about is in the distributor ( impulse
coil ). I show it on my site. If it goes out, you will not be able to start
the car unless you hot wire it.I know, I just installed a new one in my
11004"


The most common symptom of a defective impulse coil is that the engine will
shut off after it is up to temperature and will not re-start until the
engine completely cools down. If the "no start" problem is related to a
failure of the impulse coil there is no way to "hot wire" the high voltage
section of the ignition system.

Additionally, FYI Knut was refereeing to the ignition coil not the impulse
coil.


DMC Joe

"We're here to help you"

DMC Help / De Lorean Services / <dmchelp@xxxx>
Web Site: <www.deloreanservices.com>

----- Original Message -----
From: <dherv10@xxxx>
To: <dmcnews@xxxxxxxxxxxxxxx>
Sent: Saturday, February 17, 2001 1:58 AM
Subject: [DML] Re: Probs with fuel pump & RPM relay


> 88, Knut is correct naturally, My 2 cents is: the coil he is talking
> about is in the distributor ( impulse coil ). I show it on my site.
> If it goes out, you will not be able to start the car unless you hot
> wire it.I know, I just installed a new one in my 11004.
> John Hervey
> www.specialTauto.com
>
>
> --- In dmcnews@xxxx, knut.s.grimsrud@xxxx wrote:
> > I think the problem stems from a little misunderstanding of the
> > operation of the RPM relay.
> >
> > The RPM relay receives an impulse from the coil (I suspect it's
> > the same signal driving the tach) that essentially informs it that
> the
> > engine is running. After the relay no longer sees any impulses, it
> > will shut off after a couple seconds in order to avoid running when
> > the engine is stopped. Although it is true that the relay will shut
> > off after a couple seconds, I don't think it's supposed to turn on
> > first unless presented with an impuse on its sense signal (first
> > spark when cranking).
> >
> > The RPM relay is actually pretty simple and it's based on a
> > run-o-the-mill 555 timer circuit (you can still get 555 timers at
> > Radio Shack even though they really only sell cell phones and
> > remote-controlled cars nowadays).
> >
> > Knut
> >
> >
> >
> > --- In dmcnews@xxxx, at88mph@xxxx wrote:
> >
> > > I'm not getting power to my fuel pump when I turn the key to the
> > 'run'
> > > position. (when the pump should run for two to three seconds and
> > then shut
> > > off ) I know that my RPM relay is fine. I tested it in another
> > DeLorean
> > > and it does work.