[Diy_efi] Ford algorithym for opening the EGR valve

Fri Nov 5 00:18:22 GMT 2004

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Hello

I work in an automotive repair shop, and this is a common problem with
these. Actually they develop a surge more often. I cant help with the
computer part of it, but I can tell you to check the filter on the top =
of
the egr solenoid. They have something like scotchbrite there, clean it =
with
carb. Cleaner and use compressed air to blow it off.

Good luck

Aaron

=20

=20

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] =
On
Behalf Of Joe Lopilato
Sent: Thursday, November 04, 2004 3:34 PM
To: diy_efi at diy-efi.org
Subject: [Diy_efi] Ford algorithym for opening the EGR valve

=20

Hi all:

=20

I have a 1988 Ford F-150, 4X4, 5.0L. engine.

=20

Does anyone have any info on what inputs are used by the PCM to decide =
to
open the EGR valve on this engine. I can't believe that the PCM opens =
the
valve relative to the engine rpm only. I am trying to debug a problem =
that I
have with an EGR that is not opening. I have performed all of the =
diagnostic
tests recommended by Ford and everything (EGR, EVP, EGR Solenoid) works =
in
static mode.  But the valve does not open while driving the vehicle.

=20

If anyone has any info on this or can lead me to a site that may shed =
some
light on this issue I would appreciate it.

=20

Regards,

=20

Joe=20

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=20

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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Hello</span></font></p>

I work in an automotive repair =
shop, and
this is a common problem with these. Actually they develop a surge more =
often. I
cant help with the computer part of it, but I can tell you to check the =
filter
on the top of the egr solenoid. They have something like scotchbrite =
there,
clean it with carb. Cleaner and use compressed air to blow it =
off.

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Good luck</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Aaron</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>&nbsp;</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>&nbsp;</span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DTahoma><span
style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original =
Message-----<br>
<b><span style=3D'font-weight:bold'>From:</span></b> =
diy_efi-bounces at diy-efi.org
[mailto:diy_efi-bounces at diy-efi.org] <b><span =
style=3D'font-weight:bold'>On Behalf
Of </span></b>Joe Lopilato<br>
<b><span style=3D'font-weight:bold'>Sent:</span></b> Thursday, November =
04, 2004
3:34 PM<br>
<b><span style=3D'font-weight:bold'>To:</span></b> =
diy_efi at diy-efi.org<br>
<b><span style=3D'font-weight:bold'>Subject:</span></b> [Diy_efi] Ford =
algorithym
for opening the EGR valve</span></font></p>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>&nbsp;</span></font></p>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Hi all:</span></font></p>

</div>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>&nbsp;</span></font></p>

</div>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>I have a 1988 Ford F-150, =
4X4, 5.0L.
engine.</span></font></p>

</div>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>&nbsp;</span></font></p>

</div>

<div>

Does anyone have any info =
on what
inputs are used by the PCM to decide to open the EGR valve on this
engine.&nbsp;I can't believe that the PCM opens the valve relative to =
the
engine rpm only. I am trying to debug a problem that I have with an EGR =
that is
not opening. I have performed all of the diagnostic tests recommended by =
Ford
and everything (EGR, EVP, EGR Solenoid) works in static mode. &nbsp;But =
the
valve does not open while driving the vehicle.

</div>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>&nbsp;</span></font></p>

</div>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>If anyone has any info on =
this or
can lead me to a site that may shed some light on this issue I would =
appreciate
it.</span></font></p>

</div>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>&nbsp;</span></font></p>

</div>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Regards,</span></font></p>

</div>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'>&nbsp;</span></font></p>

</div>

<div>

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Joe&nbsp;</span></font></p>

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