[Diy_efi] Testing an inductance coil.

Joe Boucher boucherj at prodigy.net
Wed Aug 17 03:21:44 UTC 2005


This is a multi-part message in MIME format.

--===============1205427742==
Content-Type: multipart/alternative;
	boundary="----=_NextPart_000_0028_01C5A2AF.6A463650"

This is a multi-part message in MIME format.

------=_NextPart_000_0028_01C5A2AF.6A463650
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

The MAF is working.  There is a diagnostic LED in the box.  If it is
functioning, then the LED goes out.  I held the MAS to a fan and the light
went out.

I have not installed the system on the car yet.  I am using the car as a
source of the tach and spark plug wire signal.

There is a get home function which allows the injectors to fire without the
MAF.  The MAF is not the problem.  How to check the coil is the problem.

Joe
  -----Original Message-----
  From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of don.broadus at exeloncorp.com
  Sent: Tuesday, August 16, 2005 8:45 AM
  To: diy_efi at diy-efi.org
  Subject: RE: [Diy_efi] FW: [fangle] Testing an inductance coil.


  Your system might operate like the digital GM system. If the MAF is not
working , the injectors won"t fire.  My 95 Aurora
  engine wouldn't start, had a MAF code, unplugged the MAF and it started
fine, plugged the MAF back in no Start.







    -----Original Message-----
    From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
    Sent: Monday, August 15, 2005 9:25 PM
    To: diy_efi at diy-efi.org
    Subject: [Diy_efi] FW: [fangle] Testing an inductance coil.


    What I want to test is an inductance coil.  I purchased an analog
AirSensors EFI unit over a year ago[Joe Boucher]  at a swap meet .  The kid
told me the entire kit was there.  However, the temp sensor was missing.  A
week ago I found a source for the part.  So, I started testing.

    There are some LED's in the box indicating if certain functions are
working.  The only inputs are the mass air flow sensor, temperature,
ignition on, tach signal from coil, and an inductance coil wrapped around
the second firing spark plug wire.  Outputs are fuel pump power, an optional
fast idle signal, and the four injectors.

    I'm not sure if the inductance coil wrapped around the wire is working.
All the LED's went out, but the injectors didn't fire when I hooked up the
tach and inductance lead to the Camaro.  The coil has to be oriented
properly to the wire and I think it was correct.  Didn't have time (and the
idea) to try swapping the coil.  The diagnostic trees in the manual list the
coil has a requirement for firing.  I think.  It's not a great manual.

    I want to test the coil.  All I have is a multi-meter.  It does have a
frequency function.  I used it to test the tach signal.  There was a
frequency that increased and decreased with engine speed from the tach
signal.  Can I use the frequency meter to see if there is a signal [Joe
Boucher] from the spark plug coil without destroying the millimeter?  Or
should I set the meter to AC and 20K volts and see if there is a signal?

    The injectors are fired like most with the ground bring controlled to
pulse the injector.  While the unit was "on", there was not 12 volts at
either of the lines into one of the injector plugs.  One initially showed a
signal but the voltage quickly decreased to 0.  That doesn't seem good.  I
will admit the connection to the 12 volt power source was suspect, so I will
do a better job for the next test.

    My plan is to try the test again, see if the inductance coil is working,
try flipping the coil, and see if there is voltage at the injectors.  If
not, the next step is to open the box and see if I can spot where the magic
smoke has escaped.

    Thanks for any help.

    Joe


  ************************************************************************
  This e-mail and any of its attachments may contain Exelon Corporation
  proprietary information, which is privileged, confidential, or subject
  to copyright belonging to the Exelon Corporation family of Companies.
  This e-mail is intended solely for the use of the individual or entity
  to which it is addressed. If you are not the intended recipient of this
  e-mail, you are hereby notified that any dissemination, distribution,
  copying, or action taken in relation to the contents of and attachments
  to this e-mail is strictly prohibited and may be unlawful. If you have
  received this e-mail in error, please notify the sender immediately and
  permanently delete the original and any copy of this e-mail and any
  printout. Thank You.
  ************************************************************************

------=_NextPart_000_0028_01C5A2AF.6A463650
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2800.1505" name=3DGENERATOR></HEAD>
<BODY>
<DIV><SPAN class=3D339270003-17082005><FONT face=3DArial color=3D#0000ff =
size=3D2>The=20
MAF is working.&nbsp; There is a diagnostic LED in the box.&nbsp; If it =
is=20
functioning, then the LED goes out.&nbsp; I held the MAS to a fan and =
the light=20
went out.</FONT></SPAN></DIV>
<DIV><SPAN class=3D339270003-17082005><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D339270003-17082005><FONT face=3DArial color=3D#0000ff =
size=3D2>I have=20
not installed the system on&nbsp;the car yet.&nbsp; I am using the car =
as a=20
source of the tach and spark plug wire signal.</FONT></SPAN></DIV>
<DIV><SPAN class=3D339270003-17082005><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D339270003-17082005><FONT face=3DArial color=3D#0000ff =
size=3D2>There=20
is a get home function which allows the injectors to fire without the =
MAF.&nbsp;=20
The MAF is not the problem.&nbsp; How to check the coil is the=20
problem.</FONT></SPAN></DIV>
<DIV><SPAN class=3D339270003-17082005><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D339270003-17082005><FONT face=3DArial color=3D#0000ff =

size=3D2>Joe</FONT></SPAN></DIV>
<BLOCKQUOTE>
  <DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
  size=3D2>-----Original Message-----<BR><B>From:</B> =
diy_efi-bounces at diy-efi.org=20
  [mailto:diy_efi-bounces at diy-efi.org]<B>On Behalf Of=20
  </B>don.broadus at exeloncorp.com<BR><B>Sent:</B> Tuesday, August 16, =
2005 8:45=20
  AM<BR><B>To:</B> diy_efi at diy-efi.org<BR><B>Subject:</B> RE: [Diy_efi] =
FW:=20
  [fangle] Testing an inductance coil.<BR><BR></FONT></DIV>
  <DIV><SPAN class=3D934583613-16082005><FONT face=3DArial =
color=3D#0000ff size=3D2>Your=20
  system might operate like the digital GM system. If the MAF is not =
working ,=20
  the injectors won"t fire.&nbsp;&nbsp;My 95 Aurora</FONT></SPAN></DIV>
  <DIV><SPAN class=3D934583613-16082005><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2>engine wouldn't start,&nbsp;had a MAF code, unplugged the MAF =
and it=20
  started fine, plugged the MAF back in no Start.=20
  &nbsp;&nbsp;</FONT></SPAN></DIV>
  <DIV><SPAN class=3D934583613-16082005><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <DIV><SPAN class=3D934583613-16082005><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <DIV><SPAN class=3D934583613-16082005><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <DIV><SPAN class=3D934583613-16082005><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <DIV><SPAN class=3D934583613-16082005><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <DIV><SPAN class=3D934583613-16082005><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <DIV><SPAN class=3D934583613-16082005><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
    <DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
    size=3D2>-----Original Message-----<BR><B>From:</B>=20
    diy_efi-bounces at diy-efi.org=20
    [mailto:diy_efi-bounces at diy-efi.org]<BR><B>Sent:</B> Monday, August =
15, 2005=20
    9:25 PM<BR><B>To:</B> diy_efi at diy-efi.org<BR><B>Subject:</B> =
[Diy_efi] FW:=20
    [fangle] Testing an inductance coil.<BR><BR></FONT></DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2>What I want to test is an inductance coil.&nbsp; I =
purchased an=20
    analog AirSensors EFI unit over a year ago<SPAN=20
    class=3D739481902-16082005>[Joe Boucher]&nbsp; at a swap=20
    meet&nbsp;</SPAN>.&nbsp; The kid told me the entire kit was =
there.&nbsp;=20
    However, the temp sensor was missing.&nbsp; A week ago I found a =
source for=20
    the part.&nbsp; So, I started testing.</FONT></SPAN></DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2></FONT></SPAN>&nbsp;</DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2>There are some LED's in the box indicating if certain =
functions are=20
    working.&nbsp; The only inputs are the mass air flow sensor, =
temperature,=20
    ignition on, tach signal from coil, and an inductance coil wrapped =
around=20
    the second firing spark plug wire.&nbsp; Outputs are fuel pump =
power, an=20
    optional fast idle signal, and the four =
injectors.</FONT></SPAN></DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2></FONT></SPAN>&nbsp;</DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2>I'm not sure if the inductance coil wrapped around the wire =
is=20
    working.&nbsp; All the LED's went out, but the injectors didn't fire =
when I=20
    hooked up the tach and inductance lead to the Camaro.&nbsp; The coil =
has to=20
    be oriented properly to the wire and I think it was correct.&nbsp; =
Didn't=20
    have time (and the idea) to try swapping the coil.&nbsp; The =
diagnostic=20
    trees in the manual list the coil has a requirement for =
firing.&nbsp; I=20
    think.&nbsp; It's not a great manual.</FONT></SPAN></DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2></FONT></SPAN>&nbsp;</DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff size=3D2>I=20
    want to test the coil.&nbsp; All I have is a multi-meter.&nbsp; It =
does have=20
    a frequency function.&nbsp; I used it to test the tach signal.&nbsp; =
There=20
    was a frequency that increased and decreased with engine speed<SPAN=20
    class=3D739481902-16082005> from the tach signal</SPAN>.&nbsp; Can I =
use the=20
    frequency meter to see if there is a signal <SPAN=20
    class=3D739481902-16082005>[Joe Boucher]&nbsp;from the spark plug=20
    coil&nbsp;</SPAN>without destroying the millimeter?&nbsp;=20
    Or&nbsp;should&nbsp;I set the meter to AC and 20K volts and see if =
there is=20
    a signal?</FONT></SPAN></DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2></FONT></SPAN>&nbsp;</DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial><FONT=20
    color=3D#0000ff><FONT size=3D2>The injectors are fired like most =
with=20
    the&nbsp;ground bring controlled to pulse the injector.&nbsp; While =
the unit=20
    was "on", there was not 12 volts at either of the lines into one of =
the=20
    injector plugs.&nbsp; One initially showed a signal but the voltage =
quickly=20
    decreased to 0.&nbsp; That doesn't seem good.<SPAN=20
    class=3D739481902-16082005>&nbsp; I will admit the connection to the =
12 volt=20
    power source was suspect, so I will do a better job for the next=20
    test.&nbsp;</SPAN><SPAN=20
    =
class=3D739481902-16082005>&nbsp;</SPAN></FONT></FONT></FONT></SPAN></DIV=
>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2></FONT></SPAN>&nbsp;</DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff size=3D2>My=20
    plan is to try the test again, see if the inductance coil is =
working, try=20
    flipping the coil, and see if there is voltage at the =
injectors.&nbsp; If=20
    not, the next step is to open the box and see if I can spot where =
the magic=20
    smoke has escaped.</FONT></SPAN></DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2></FONT></SPAN>&nbsp;</DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2>Thanks for any help.</FONT></SPAN></DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2></FONT></SPAN>&nbsp;</DIV>
    <DIV><SPAN class=3D414124301-15082005><FONT face=3DArial =
color=3D#0000ff=20
    size=3D2>Joe</FONT></SPAN></DIV></BLOCKQUOTE><!-- |**|end egp html =
banner|**| --><!-- |**|begin egp html banner|**| --><FONT=20
  =
size=3D3><BR><BR>********************************************************=
****************<BR>This=20
  e-mail and any of its attachments may contain Exelon=20
  Corporation<BR>proprietary information, which is privileged, =
confidential, or=20
  subject <BR>to copyright belonging to the Exelon Corporation family of =

  Companies. <BR>This e-mail is intended solely for the use of the =
individual or=20
  entity <BR>to which it is addressed. If you are not the intended =
recipient of=20
  this <BR>e-mail, you are hereby notified that any dissemination, =
distribution,=20
  <BR>copying, or action taken in relation to the contents of and =
attachments=20
  <BR>to this e-mail is strictly prohibited and may be unlawful. If you =
have=20
  <BR>received this e-mail in error, please notify the sender =
immediately and=20
  <BR>permanently delete the original and any copy of this e-mail and =
any=20
  <BR>printout. Thank=20
  =
You.<BR>*****************************************************************=
*******<BR></BLOCKQUOTE></FONT></BODY></HTML>

------=_NextPart_000_0028_01C5A2AF.6A463650--



--===============1205427742==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://lists.diy-efi.org/mailman/listinfo/diy_efi

--===============1205427742==--





More information about the Diy_efi mailing list