T/S EECIV setup

Bob Wooten r71chevy at earthlink.net
Sat Feb 16 04:34:40 GMT 2002


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No idea's here guys?

TIA
BW
  -----Original Message-----
  From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
Behalf Of Bob Wooten
  Sent: Friday, February 15, 2002 11:01 AM
  To: diy_efi at diy-efi.org
  Subject: T/S EECIV setup



  A buddy of mine & I have been working on a 87 Ford F150 w/a 302 (Fed not
California) w/the EEC IV EFI setup on it.  the problem is that the ECM is
pulling all the timing out of it when there is a load on the engine. It does
not appear to do it when you don't have a load & just rev the motor up.  the
first thought was the Knock sensor, but he has bypassed it with a resistor
(don't know what value or anything, someone @ Ford told him how to do it) &
it did the same thing.

  Items changed:
  Ign Module (with Napa Brand)
  CTS
  MAT
  EGR (it was leaking, & needed it)
  ECM
  MAP

  Items checked:
  KS (bypassed)
  Fuel pressure (solid)
  O2 (responds predictably)
  Ign Module (on a checker, as well as replaced with new)

  Specifically what he is doing is putting it onto his dyno (IM240 chassis
dyno), & starts to do the normal smog check under power & he noticed that it
pulls all 22 Deg of timing out until it is down to the 10* Base setting.  if
he puts it into Neutral & just revs the motor all appears good.  one test
that I thought was the tell tale was that he removed the EST (or whatever
Ford calls it), bumped the timing up a BUNCH & then put it back on the Dyno.
He did a pull, & the ECM was not able to pull the timing out & all appeared
to work fine.  the engine still had plenty of power & it ran............
Well ............... fine.  he moved the timing back down & plugged the EST
back in & the same problem came back.

  Logically, I am thinking "what tells the ECM to pull timing...........
Knock Sensor (Duh), maybe MAT, or MAP & of course the Prom.

  Any help would be appreciated.

  PS. Sorry about the HTML, I am @ work, & this is the only connection I
have.

  --- Bob Wooten
  --- r71chevy at earthlink.net
  --- www.r71camaro.homestead.com




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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 5.50.4807.2300" name=3DGENERATOR></HEAD>
<BODY>
<DIV><SPAN class=3D910502904-16022002><FONT face=3DArial color=3D#0000ff =
size=3D2>No=20
idea's here guys?</FONT></SPAN></DIV>
<DIV><SPAN class=3D910502904-16022002><FONT face=3DArial color=3D#0000ff =

size=3D2></FONT></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D910502904-16022002><FONT face=3DArial color=3D#0000ff =

size=3D2>TIA</FONT></SPAN></DIV>
<DIV><SPAN class=3D910502904-16022002><FONT face=3DArial color=3D#0000ff =

size=3D2>BW</FONT></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
  <DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
  size=3D2>-----Original Message-----<BR><B>From:</B> =
owner-diy_efi at diy-efi.org=20
  [mailto:owner-diy_efi at diy-efi.org]<B>On Behalf Of </B>Bob=20
  Wooten<BR><B>Sent:</B> Friday, February 15, 2002 11:01 =
AM<BR><B>To:</B>=20
  diy_efi at diy-efi.org<BR><B>Subject:</B> T/S EECIV =
setup<BR><BR></FONT></DIV>
  <P>
  <DIV></DIV>
  <DIV>A buddy of mine &amp; I have been working on a 87 Ford F150 w/a =
302=20
  (Fed&nbsp;not California) w/the EEC IV EFI setup on it.&nbsp; the =
problem is=20
  that the ECM is pulling all the timing out of it when there is a load =
on the=20
  engine. It does not appear to do it when you don't have a load &amp; =
just rev=20
  the motor up.&nbsp; the first thought was the Knock sensor, but he has =

  bypassed it with a resistor (don't know what value or anything, =
someone @ Ford=20
  told him how to do it) &amp; it did the same thing.&nbsp; </DIV>
  <DIV>&nbsp;</DIV>
  <DIV>Items changed:</DIV>
  <DIV>Ign Module (with Napa Brand)</DIV>
  <DIV>CTS</DIV>
  <DIV>MAT</DIV>
  <DIV>EGR (it was leaking, &amp; needed it)</DIV>
  <DIV>ECM</DIV>
  <DIV>MAP</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>Items checked:<BR>KS (bypassed)</DIV>
  <DIV>Fuel pressure (solid)</DIV>
  <DIV>O2 (responds predictably)</DIV>
  <DIV>Ign Module (on a checker, as well as replaced with new)</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>Specifically what he is doing is putting it onto his dyno (IM240 =
chassis=20
  dyno), &amp; starts to do the normal smog check under power &amp; he =
noticed=20
  that it pulls all 22 Deg of timing out until it is down to the 10* =
Base=20
  setting.&nbsp; if he puts it into Neutral &amp; just revs the motor =
all=20
  appears good.&nbsp; one test that I thought was the tell tale was that =
he=20
  removed the EST (or whatever Ford calls it), bumped the timing up a =
BUNCH=20
  &amp; then put it back on the Dyno.&nbsp; He did a pull, &amp; the ECM =
was not=20
  able to pull the timing out &amp; all appeared to work fine.&nbsp; the =
engine=20
  still had plenty of power &amp; it ran............ Well =
...............=20
  fine.&nbsp; he moved the timing back down &amp; plugged the EST back =
in &amp;=20
  the same problem came back.&nbsp; </DIV>
  <DIV>&nbsp;</DIV>
  <DIV>Logically, I am thinking "what tells the ECM to pull =
timing...........=20
  Knock Sensor (Duh), maybe MAT, or MAP &amp; of course the Prom.&nbsp; =
</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>Any help would be appreciated.</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>PS. Sorry about the HTML, I am @ work, &amp; this is the only =
connection=20
  I have.</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>--- Bob Wooten</DIV>
  <DIV>--- <A=20
  =
href=3D"mailto:r71chevy at earthlink.net">r71chevy at earthlink.net</A></DIV>
  <DIV>--- <A=20
  =
href=3D"http://www.r71camaro.homestead.com">www.r71camaro.homestead.com</=
A></DIV>
  <DIV>&nbsp;</DIV>
  <DIV>&nbsp;</DIV>
  <P></P></BLOCKQUOTE></BODY></HTML>

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