[Diy_efi] Ford algorithym for opening the EGR valve

Ed Gilroy egilroy at comcast.net
Fri Nov 5 01:47:06 GMT 2004 

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MessageAe you sure that the valve is not opening? If the EGR passages in =
the manifolds are clogged with carbon, you get an EGR error. They sell =
some special EGR passage reamers to rectify this problem for some =
vehicles (I have used these on my Honda). Usually the EGR passages clog =
due to oil leakage past the valve seals. Depending on the engine, you =
may have to remove the manifold to get it cleaned out.

YMMV...Ed

  ----- Original Message -----=20
  From: Joe Lopilato=20
  To: 'A list for Do-It-Yourself EFI'=20
  Sent: Thursday, November 04, 2004 7:20 PM
  Subject: RE: [Diy_efi] Ford algorithym for opening the EGR valve


  Hi:

  Actually I replaced the solenoid valve with a new one becuase i =
thought that the old one might not be opening. But the new solenoid is =
reacting exactly the same way as the old one. I'm now wondering if the =
position sensor on top of the EGR valve might not be sending the correct =
EGR valve position to the PCM. Or one of the other sensors that the PCM =
uses to open the EGR valve is not working. Any info would be =
appreciated.

  Joe
    -----Original Message-----
    From: diy_efi-bounces at diy-efi.org =
[mailto:diy_efi-bounces at diy-efi.org] On Behalf Of Aaron
    Sent: Thursday, November 04, 2004 7:06 PM
    To: 'A list for Do-It-Yourself EFI'
    Subject: RE: [Diy_efi] Ford algorithym for opening the EGR valve


    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





    -----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



    Hi all:



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



    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.



    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.



    Regards,



    Joe=20



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<BODY lang=3DEN-US vLink=3Dpurple link=3Dblue bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Ae you sure that the valve is not =
opening?&nbsp;If=20
the EGR passages in the manifolds are clogged with carbon, you get an =
EGR error.=20
They sell some special EGR passage reamers to rectify this problem for =
some=20
vehicles (I have used these on&nbsp;my&nbsp;Honda). Usually the EGR =
passages=20
clog due to oil leakage past the valve seals. Depending on the engine, =
you may=20
have to remove the manifold to get it cleaned out.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>YMMV...Ed</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3Djosephl at aei.ca href=3D"mailto:josephl at aei.ca">Joe =
Lopilato</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Ddiy_efi at diy-efi.org=20
  href=3D"mailto:diy_efi at diy-efi.org">'A list for Do-It-Yourself =
EFI'</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Thursday, November 04, =
2004 7:20=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: [Diy_efi] Ford =
algorithym=20
  for opening the EGR valve</DIV>
  <DIV><BR></DIV>
  <DIV><SPAN class=3D471231400-05112004><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2>Hi:</FONT></SPAN></DIV>
  <DIV><SPAN class=3D471231400-05112004><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <DIV><SPAN class=3D471231400-05112004><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2>Actually I replaced the solenoid valve with a new one becuase =
i thought=20
  that the old one might not be opening. But the new solenoid is =
reacting=20
  exactly the same way as the old one. I'm now wondering if the position =
sensor=20
  on top of the EGR valve might not be sending the correct EGR valve =
position to=20
  the PCM. Or one of the other sensors that the PCM uses to open the EGR =
valve=20
  is not working. Any info would be appreciated.</FONT></SPAN></DIV>
  <DIV><SPAN class=3D471231400-05112004><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2></FONT></SPAN>&nbsp;</DIV>
  <DIV><SPAN class=3D471231400-05112004><FONT face=3DArial =
color=3D#0000ff=20
  size=3D2>Joe</FONT></SPAN></DIV>
  <BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
    <DIV></DIV>
    <DIV class=3DOutlookMessageHeader lang=3Den-us dir=3Dltr =
align=3Dleft><FONT=20
    face=3DTahoma size=3D2>-----Original Message-----<BR><B>From:</B>=20
    diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] =
<B>On=20
    Behalf Of </B>Aaron<BR><B>Sent:</B> Thursday, November 04, 2004 7:06 =

    PM<BR><B>To:</B> 'A list for Do-It-Yourself EFI'<BR><B>Subject:</B> =
RE:=20
    [Diy_efi] Ford algorithym for opening the EGR =
valve<BR><BR></FONT></DIV>
    <DIV class=3DSection1>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">Hello</SPAN></FONT></P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I work in =
an=20
    automotive repair shop, and this is a common problem with these. =
Actually=20
    they develop a surge more often. I cant help with the computer part =
of it,=20
    but I can tell you to check the filter on the top of the egr =
solenoid. They=20
    have something like scotchbrite there, clean it with carb. Cleaner =
and use=20
    compressed air to blow it off.</SPAN></FONT></P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Good=20
    luck</SPAN></FONT></P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">Aaron</SPAN></FONT></P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"></SPAN></FONT>&nbsp;</P>
    <P class=3DMsoNormal><FONT face=3DArial color=3Dnavy size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial"></SPAN></FONT>&nbsp;</P>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3DTahoma size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original=20
    Message-----<BR><B><SPAN style=3D"FONT-WEIGHT: =
bold">From:</SPAN></B>=20
    diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] =
<B><SPAN=20
    style=3D"FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Joe =
Lopilato<BR><B><SPAN=20
    style=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday, November 04, =
2004 3:34=20
    PM<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B>=20
    diy_efi at diy-efi.org<BR><B><SPAN=20
    style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> [Diy_efi] Ford =
algorithym for=20
    opening the EGR valve</SPAN></FONT></P>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: 12pt"></SPAN></FONT>&nbsp;</P>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hi =
all:</SPAN></FONT></P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></FONT>&nbsp;</P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I have a 1988 Ford =
F-150, 4X4,=20
    5.0L. engine.</SPAN></FONT></P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></FONT>&nbsp;</P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Does anyone have any =
info on=20
    what inputs are used by the PCM to decide to open the EGR valve on =
this=20
    engine.&nbsp;I can't believe that the PCM opens the valve relative =
to the=20
    engine rpm only. I am trying to debug a problem that I have with an =
EGR that=20
    is not opening. I have performed all of the diagnostic tests =
recommended by=20
    Ford and everything (EGR, EVP, EGR Solenoid) works in static mode. =
&nbsp;But=20
    the valve does not open while driving the =
vehicle.</SPAN></FONT></P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></FONT>&nbsp;</P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">If anyone has any info =
on this=20
    or can lead me to a site that may shed some light on this issue I =
would=20
    appreciate it.</SPAN></FONT></P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></FONT>&nbsp;</P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Regards,</SPAN></FONT></P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></FONT>&nbsp;</P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Joe&nbsp;</SPAN></FONT></P></DIV></DIV><BR>
    <P><FONT size=3D2>---<BR>Outgoing mail is certified Virus =
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