Subject: [Shop-talk] Geneeral Motors Active Fuel Management (DOD) problem

From: "john" <[email-masked]>
Date: Wed, 14 Feb 2024 14:28:32 -0600

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Does anyone have any experience with the GM DOD system ?  Specifically dele=
ting=20
by software or the WWW-offered module that eliminates
the dropping to V4 under light load.
=20
I lost an engine due to this problem at 130K and replaced it with a Jasper=
=20
crate engine that does have the DOD included. =20
=20
Need some guidance from some that have hands on experience with this.  Does=
 the=20
Module that plugs into the BOD plug actually work and is it safe
=20
OR is a software tune required?? or must I go thru the tear down and instal=
l of=20
a delete kit
=20
thanks
john
=20
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<HTML><HEAD>
<META name=3DGENERATOR content=3D"MSHTML 11.00.10570.1001"></HEAD>
<BODY>
<DIV><FONT face=3D"Segoe UI">Does anyone have any experience with the GM DO=
D system ?&nbsp; Specifically deleting by software or the WWW-offered modul=
e that eliminates</FONT></DIV>
<DIV><FONT face=3D"Segoe UI">the dropping to V4 under light load.</FONT></D=
IV>
<DIV><FONT face=3D"Segoe UI"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Segoe UI">I lost an engine due to this problem at 130K a=
nd replaced it with a Jasper crate engine that does have the DOD included.&=
nbsp; </FONT></DIV>
<DIV><FONT face=3D"Segoe UI"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Segoe UI">Need some guidance from some that have hands o=
n experience with this.&nbsp; Does the Module that plugs into the BOD plug =
actually work and is it safe</FONT></DIV>
<DIV><FONT face=3D"Segoe UI"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Segoe UI">OR is a software tune required?? or must I go =
thru the tear down and install of a delete kit</FONT></DIV>
<DIV><FONT face=3D"Segoe UI"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Segoe UI">thanks</FONT></DIV>
<DIV><FONT face=3D"Segoe UI">john</FONT></DIV>
<DIV>&nbsp;</DIV></BODY></HTML>
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_______________________________________________

[email-masked]
Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive

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From: John Innis <[email-masked]>
Date: Wed, 14 Feb 2024 15:30:57 -0600

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In my experience, it is a combination of things that cause issues with the
AFM system.  The first (and in my opinion most common) is not doing proper
maintenance.  A conservative oil change interval with a good quality engine
oil seems to go a long way to heading off issues with AFM on the LS
motors.  The next biggest issue in my opinion is the quality of the lifters
that GM used from the factory.  I have had several engine builders that I
trust say that using a better quality aftermarket lifter in the AFM valves
is the best insurance you can buy on a build.  Therein is the biggest issue
with many of the DOD delete methods being offered.  They frequently only
address the ECU, taking the AFM out of the tune.  This will NOT solve
issues caused by low quality lifters failing when AFM is not activated, it
can still happen.  I don't have experience with the plug in modules, so I
can't say if they are safe or not, but like the tune, they don't address
the potential problems in the lifters.  I also don't know that much about
what Jasper is putting in their remans, so I can't say if they are going to
cause you problems or not.

On Wed, Feb 14, 2024 at 3:08=E2=80=AFPM john <[email-masked]> wrote:

> Does anyone have any experience with the GM DOD system ?  Specifically
> deleting by software or the WWW-offered module that eliminates
> I lost an engine due to this problem at 130K and replaced it with a Jaspe=
r
> crate engine that does have the DOD included.
>
> Need some guidance from some that have hands on experience with this.
> Does the Module that plugs into the BOD plug actually work and is it safe
>
> OR is a software tune required?? or must I go thru the tear down and
> install of a delete kit
>
> thanks
> john
>
> Donate: http://www.team.net/donate.html
> Suggested annual donation  $12.96
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/shop-talk/[email-masked]
>
>

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=3D=3D=3D=3D=3D=3D=3D=3D
=3D Never offend people with style when you   =3D
=3D can offend with substance --- Sam Brown  =3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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<div dir=3D"ltr">In my experience, it is a combination of things that cause=
 issues with the AFM system.=C2=A0 The first (and in my opinion most common=
) is not doing proper maintenance.=C2=A0 A conservative oil change interval=
 with a good quality engine oil seems to go a long way to heading off issue=
s with AFM on the LS motors.=C2=A0 The next biggest issue in my opinion is =
the quality of the lifters that GM used from the factory.=C2=A0 I have had =
several engine builders that I trust say that using a better quality afterm=
arket lifter in the AFM valves is the best insurance you can buy on a build=
.=C2=A0 Therein is the biggest issue with many of the DOD delete methods be=
ing offered.=C2=A0 They frequently only address the ECU, taking the AFM out=
 of the tune.=C2=A0 This will NOT solve issues caused by low quality lifter=
s failing when AFM is not activated, it can still happen.=C2=A0 I don&#39;t=
 have experience with the plug in modules, so I can&#39;t say if they are s=
afe or not, but like the tune, they don&#39;t address the potential problem=
s in the lifters.=C2=A0 I also don&#39;t know that much about what Jasper i=
s putting in their remans, so I can&#39;t say if they are going to cause yo=
u problems or not. <br></div><br><div class=3D"gmail_quote"><div dir=3D"ltr=
" class=3D"gmail_attr">On Wed, Feb 14, 2024 at 3:08=E2=80=AFPM john &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote:<br></div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">

<div>
<div><font face=3D"Segoe UI">Does anyone have any experience with the GM DO=
D system ?=C2=A0 Specifically deleting by software or the WWW-offered modul=
e that eliminates</font></div>
<div><font face=3D"Segoe UI">the dropping to V4 under light load.</font></d=
iv>
<div><font face=3D"Segoe UI"></font>=C2=A0</div>
<div><font face=3D"Segoe UI">I lost an engine due to this problem at 130K a=
nd replaced it with a Jasper crate engine that does have the DOD included.=
=C2=A0 </font></div>
<div><font face=3D"Segoe UI"></font>=C2=A0</div>
<div><font face=3D"Segoe UI">Need some guidance from some that have hands o=
n experience with this.=C2=A0 Does the Module that plugs into the BOD plug =
actually work and is it safe</font></div>
<div><font face=3D"Segoe UI"></font>=C2=A0</div>
<div><font face=3D"Segoe UI">OR is a software tune required?? or must I go =
thru the tear down and install of a delete kit</font></div>
<div><font face=3D"Segoe UI"></font>=C2=A0</div>
<div><font face=3D"Segoe UI">thanks</font></div>
<div><font face=3D"Segoe UI">john</font></div>
<div>=C2=A0</div></div>_______________________________________________<br>
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<br>
</blockquote></div><br clear=3D"all"><br><span class=3D"gmail_signature_pre=
fix">-- </span><br><div dir=3D"ltr" class=3D"gmail_signature">=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D<br>=3D Never offend people with style when you=C2=A0=C2=A0 =3D=
<br>=3D can offend with substance --- Sam Brown=C2=A0 =3D<br>=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D</div>

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[email-masked]

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