[Diy_efi] FW: [fangle] Testing an inductance coil.
don.broadus at exeloncorp.com
don.broadus at exeloncorp.com
Tue Aug 16 13:55:48 UTC 2005
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Your system might operate like the digital GM system. If the MAF is not wor=
king , the injectors won"t fire. My 95 Aurora
engine wouldn't start, had a MAF code, unplugged the MAF and it started fin=
e, plugged the MAF back in no Start. =20
=20
=20
=20
=20
=20
=20
=20
-----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 AirSensor=
s 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 ag=
o I found a source for the part. So, I started testing.
=20
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 fir=
ing spark plug wire. Outputs are fuel pump power, an optional fast idle si=
gnal, and the four injectors.
=20
I'm not sure if the inductance coil wrapped around the wire is working. Al=
l the LED's went out, but the injectors didn't fire when I hooked up the ta=
ch 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) t=
o 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.
=20
I want to test the coil. All I have is a multi-meter. It does have a freq=
uency 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 me=
ter to AC and 20K volts and see if there is a signal?
=20
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 o=
f 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 ad=
mit the connection to the 12 volt power source was suspect, so I will do a =
better job for the next test. =20
=20
My plan is to try the test again, see if the inductance coil is working, tr=
y 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 smo=
ke has escaped.
=20
Thanks for any help.
=20
Joe
************************************************************************
This e-mail and any of its attachments may contain Exelon Corporation
proprietary information, which is privileged, confidential, or subject=20
to copyright belonging to the Exelon Corporation family of Companies.=20
This e-mail is intended solely for the use of the individual or entity=20
to which it is addressed. If you are not the intended recipient of this=20
e-mail, you are hereby notified that any dissemination, distribution,=20
copying, or action taken in relation to the contents of and attachments=20
to this e-mail is strictly prohibited and may be unlawful. If you have=20
received this e-mail in error, please notify the sender immediately and=20
permanently delete the original and any copy of this e-mail and any=20
printout. Thank You.
************************************************************************
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<BODY>
<DIV><SPAN class=3D934583613-16082005><FONT face=3DArial color=3D#0000ff si=
ze=3D2>Your=20
system might operate like the digital GM system. If the MAF is not working =
, the=20
injectors won"t fire. My 95 Aurora</FONT></SPAN></DIV>
<DIV><SPAN class=3D934583613-16082005><FONT face=3DArial color=3D#0000ff si=
ze=3D2>engine=20
wouldn't start, had a MAF code, unplugged the MAF and it started fine,=
plugged the MAF back in no Start. </FONT></SPAN></DIV>
<DIV><SPAN class=3D934583613-16082005><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D934583613-16082005><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D934583613-16082005><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D934583613-16082005><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D934583613-16082005><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D934583613-16082005><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D934583613-16082005><FONT face=3DArial color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT face=3DTah=
oma=20
size=3D2>-----Original Message-----<BR><B>From:</B> diy_efi-bounces at diy-e=
fi.org=20
[mailto:diy_efi-bounces at diy-efi.org]<BR><B>Sent:</B> Monday, August 15, 2=
005=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 =
size=3D2>What=20
I want to test is an inductance coil. I purchased an analog AirSens=
ors=20
EFI unit over a year ago<SPAN class=3D739481902-16082005>[Joe Boucher]&nb=
sp; at=20
a swap meet </SPAN>. The kid told me the entire kit was=20
there. However, the temp sensor was missing. A week ago I fou=
nd a=20
source for the part. So, I started testing.</FONT></SPAN></DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2>There are some LED's in the box indicating if certain functions=
are=20
working. The only inputs are the mass air flow sensor, temperature,=
ignition on, tach signal from coil, and an inductance coil wrapped aroun=
d the=20
second firing spark plug wire. Outputs are fuel pump power, an opti=
onal=20
fast idle signal, and the four injectors.</FONT></SPAN></DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff =
size=3D2>I'm=20
not sure if the inductance coil wrapped around the wire is working. =
All=20
the LED's went out, but the injectors didn't fire when I hooked up the ta=
ch=20
and inductance lead to the Camaro. The coil has to be oriented prop=
erly=20
to the wire and I think it was correct. Didn't have time (and the i=
dea)=20
to try swapping the coil. The diagnostic trees in the manual list t=
he=20
coil has a requirement for firing. I think. It's not a great=
manual.</FONT></SPAN></DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff =
size=3D2>I=20
want to test the coil. All I have is a multi-meter. It does h=
ave a=20
frequency function. I used it to test the tach signal. There =
was a=20
frequency that increased and decreased with engine speed<SPAN=20
class=3D739481902-16082005> from the tach signal</SPAN>. Can I use =
the=20
frequency meter to see if there is a signal <SPAN=20
class=3D739481902-16082005>[Joe Boucher] from the spark plug=20
coil </SPAN>without destroying the millimeter? =20
Or should I set the meter to AC and 20K volts and see if there =
is a=20
signal?</FONT></SPAN></DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial><FONT color=3D#0=
000ff><FONT=20
size=3D2>The injectors are fired like most with the ground bring con=
trolled=20
to pulse the injector. While the unit was "on", there was not 12 vo=
lts=20
at either of the lines into one of the injector plugs. One initiall=
y=20
showed a signal but the voltage quickly decreased to 0. That doesn'=
t=20
seem good.<SPAN class=3D739481902-16082005> I will admit the connec=
tion to=20
the 12 volt power source was suspect, so I will do a better job for the n=
ext=20
test. </SPAN><SPAN=20
class=3D739481902-16082005> </SPAN></FONT></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2></FONT></SPAN> </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=
flipping the coil, and see if there is voltage at the injectors. I=
f not,=20
the next step is to open the box and see if I can spot where the magic sm=
oke=20
has escaped.</FONT></SPAN></DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2>Thanks for any help.</FONT></SPAN></DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D414124301-15082005><FONT face=3DArial color=3D#0000ff=
size=3D2>Joe</FONT></SPAN></DIV></BLOCKQUOTE><!-- |**|end egp html banne=
r|**| --><!-- |**|begin egp html banner|**| --><FONT SIZE=3D3><BR>
<BR>
************************************************************************<BR>
This e-mail and any of its attachments may contain Exelon Corporation<BR>
proprietary information, which is privileged, confidential, or 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 entity <BR>
to which it is addressed. If you are not the intended recipient of this <B=
R>
e-mail, you are hereby notified that any dissemination, distribution, <BR>
copying, or action taken in relation to the contents of and attachments <BR>
to this e-mail is strictly prohibited and may be unlawful. If you have <BR>
received this e-mail in error, please notify the sender immediately and <BR>
permanently delete the original and any copy of this e-mail and any <BR>
printout. Thank You.<BR>
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