[Diy_efi] Ford algorithym for opening the EGR valve
Joe Lopilato
josephl at aei.ca
Fri Nov 5 00:41:11 GMT 2004
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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><FONT face=3DArial size=3D2><SPAN class=3D165192323-04112004>Hi=20
all:</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D165192323-04112004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D165192323-04112004>I have =
a 1988 Ford=20
F-150, 4X4, 5.0L. engine.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D165192323-04112004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D165192323-04112004>Does =
anyone have any=20
info on what inputs are used by the PCM to decide to open the EGR valve =
on this=20
engine. I can't believe that the PCM opens the valve relative to =
the engine=20
rpm only. I am trying to debug a problem that I have with an EGR that is =
not=20
opening. I have performed all of the diagnostic tests recommended by =
Ford and=20
everything (EGR, EVP, EGR Solenoid) works in static mode. But the =
valve=20
does not open while driving the vehicle.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D165192323-04112004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D165192323-04112004>If =
anyone has any=20
info on this or can lead me to a site that may shed some light on this =
issue I=20
would appreciate it.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D165192323-04112004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D165192323-04112004>Regards,</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D165192323-04112004></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D165192323-04112004>Joe </SPAN></FONT></DIV></BODY></HTML>
<BR>
<P><FONT SIZE=3D2>---<BR>
Outgoing mail is certified Virus Free.<BR>
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