Re: Probs with fuel pump & RPM relay

[dherv10@xxxx]

Joe, Your correct. What I meant to say and left off by mistake: If 
the impulse coil in the distributor goes out, you will not be able to 
start the car unless you hot wire (the fuel pump). Under normal 
conditions, the car would have to cool down before it will restart 
and drive a little futher untill the impulse coil heats up again, 
then a defective impulse coil will open and the car will die again. I 
have driven about 1 to 2 miles b/4 it heats up again. I was trying to 
clarify what Knut said (Quote): The RPM relay receives an impulse 
from the coil. A lot of people may assume ignition coil instead of 
impulse coil. Some people my not even know there is an impulse coil 
in the distributor and what it does. If I'm wrong, I stand corrected. 
I have a eraser on my pencil to.
John
www.specialTauto.com

.-- In dmcnews@xxxx, "DMC Joe" <dmcjoe@xxxx> wrote:
> 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@xxxx>
> 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.