[Diy_efi] Ford algorithym for opening the EGR valve

Fri Nov 5 00:25:20 GMT 2004

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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 

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<DIV><SPAN class=3D471231400-05112004><FONT face=3DArial color=3D#0000ff =

size=3D2>Hi:</FONT></SPAN></DIV>
<DIV><SPAN class=3D471231400-05112004><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D471231400-05112004><FONT face=3DArial color=3D#0000ff =

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 =
exactly=20
the same way as the old one. I'm now wondering if the position sensor on =
top of=20
the EGR valve might not be sending the correct EGR valve position to the =
PCM. Or=20
one of the other sensors that the PCM uses to open the EGR valve is not =
working.=20
Any info would be appreciated.</DIV>
<DIV><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D471231400-05112004><FONT face=3DArial color=3D#0000ff =

size=3D2>Joe</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----- From:=20
 diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] On =
Behalf=20
 Of Aaron Sent: Thursday, November 04, 2004 7:06 =
PM To:=20
 'A list for Do-It-Yourself EFI' Subject: RE: [Diy_efi] Ford=20
 algorithym for opening the EGR valve </DIV>
 <DIV class=3DSection1>
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">Hello
 <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 they=20
 develop a surge more often. I cant help with the computer part of it, =
but I=20
 can tell you to check the filter on the top of the egr solenoid. They =
have=20
 something like scotchbrite there, clean it with carb. Cleaner and use=20
 compressed air to blow it off.
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Good=20
 luck
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">Aaron
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">&nbsp;
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: =
Arial">&nbsp;
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original=20
 Message----- From:=20
 diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] =
<SPAN=20
 style=3D"FONT-WEIGHT: bold">On Behalf Of Joe =
Lopilato <SPAN=20
 style=3D"FONT-WEIGHT: bold">Sent: Thursday, November 04, =
2004 3:34=20
 PM To:=20
 diy_efi at diy-efi.org Subject:=20
 [Diy_efi] Ford algorithym for opening the EGR valve
 &nbsp;
 <DIV>
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hi =
all:</DIV>
 <DIV>
 &nbsp;</DIV>
 <DIV>
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">I have a 1988 Ford =
F-150, 4X4,=20
 5.0L. engine.</DIV>
 <DIV>
 &nbsp;</DIV>
 <DIV>
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">Does anyone have any =
info on what=20
 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.</DIV>
 <DIV>
 &nbsp;</DIV>
 <DIV>
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">If anyone has any info =
on this or=20
 can lead me to a site that may shed some light on this issue I would=20
 appreciate it.</DIV>
 <DIV>
 &nbsp;</DIV>
 <DIV>
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Regards,</DIV>
 <DIV>
 &nbsp;</DIV>
 <DIV>
 <SPAN=20
 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Joe&nbsp;</DIV></DIV> 
 --- Outgoing mail is certified Virus =
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