Idle setting on 4.0 TJ
03-04-2004, 01:37 AM
#11
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
On Wed, 3 Mar 2004 18:48:46 UTC dalewhite@aol.com (Dalewhite) wrote:
> My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> "idle air control motor" and it seems to make no difference. The engine will
> idle properly in the 6-700rpm range for a while then it will surge to anywhere
> between 1000 and 2000rpm and remain there indefinitely. The only way I have
> been able to limit the rpms to a manageble range is by blocking off a major
> part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> problem?
The first thing I would suggest is to clean the throttle body REALLY
well. Pay special attention to the IAC motor and the port it sits in
- they crud up easily. Also pay particular attention to the area just
under the throttle plate - it builds up a ridge. While you're at it,
clean the plugs for the TPS and the IAC. The biggest part of my idle
problem was cured by those three things (the rest took a few months
and a few more parts <g>).
--
Will Honea <whonea@codenet.net>
> My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> "idle air control motor" and it seems to make no difference. The engine will
> idle properly in the 6-700rpm range for a while then it will surge to anywhere
> between 1000 and 2000rpm and remain there indefinitely. The only way I have
> been able to limit the rpms to a manageble range is by blocking off a major
> part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> problem?
The first thing I would suggest is to clean the throttle body REALLY
well. Pay special attention to the IAC motor and the port it sits in
- they crud up easily. Also pay particular attention to the area just
under the throttle plate - it builds up a ridge. While you're at it,
clean the plugs for the TPS and the IAC. The biggest part of my idle
problem was cured by those three things (the rest took a few months
and a few more parts <g>).
--
Will Honea <whonea@codenet.net>
03-04-2004, 01:37 AM
#12
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
On Wed, 3 Mar 2004 18:48:46 UTC dalewhite@aol.com (Dalewhite) wrote:
> My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> "idle air control motor" and it seems to make no difference. The engine will
> idle properly in the 6-700rpm range for a while then it will surge to anywhere
> between 1000 and 2000rpm and remain there indefinitely. The only way I have
> been able to limit the rpms to a manageble range is by blocking off a major
> part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> problem?
The first thing I would suggest is to clean the throttle body REALLY
well. Pay special attention to the IAC motor and the port it sits in
- they crud up easily. Also pay particular attention to the area just
under the throttle plate - it builds up a ridge. While you're at it,
clean the plugs for the TPS and the IAC. The biggest part of my idle
problem was cured by those three things (the rest took a few months
and a few more parts <g>).
--
Will Honea <whonea@codenet.net>
> My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> "idle air control motor" and it seems to make no difference. The engine will
> idle properly in the 6-700rpm range for a while then it will surge to anywhere
> between 1000 and 2000rpm and remain there indefinitely. The only way I have
> been able to limit the rpms to a manageble range is by blocking off a major
> part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> problem?
The first thing I would suggest is to clean the throttle body REALLY
well. Pay special attention to the IAC motor and the port it sits in
- they crud up easily. Also pay particular attention to the area just
under the throttle plate - it builds up a ridge. While you're at it,
clean the plugs for the TPS and the IAC. The biggest part of my idle
problem was cured by those three things (the rest took a few months
and a few more parts <g>).
--
Will Honea <whonea@codenet.net>
03-04-2004, 01:37 AM
#13
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
On Wed, 3 Mar 2004 18:48:46 UTC dalewhite@aol.com (Dalewhite) wrote:
> My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> "idle air control motor" and it seems to make no difference. The engine will
> idle properly in the 6-700rpm range for a while then it will surge to anywhere
> between 1000 and 2000rpm and remain there indefinitely. The only way I have
> been able to limit the rpms to a manageble range is by blocking off a major
> part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> problem?
The first thing I would suggest is to clean the throttle body REALLY
well. Pay special attention to the IAC motor and the port it sits in
- they crud up easily. Also pay particular attention to the area just
under the throttle plate - it builds up a ridge. While you're at it,
clean the plugs for the TPS and the IAC. The biggest part of my idle
problem was cured by those three things (the rest took a few months
and a few more parts <g>).
--
Will Honea <whonea@codenet.net>
> My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> "idle air control motor" and it seems to make no difference. The engine will
> idle properly in the 6-700rpm range for a while then it will surge to anywhere
> between 1000 and 2000rpm and remain there indefinitely. The only way I have
> been able to limit the rpms to a manageble range is by blocking off a major
> part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> problem?
The first thing I would suggest is to clean the throttle body REALLY
well. Pay special attention to the IAC motor and the port it sits in
- they crud up easily. Also pay particular attention to the area just
under the throttle plate - it builds up a ridge. While you're at it,
clean the plugs for the TPS and the IAC. The biggest part of my idle
problem was cured by those three things (the rest took a few months
and a few more parts <g>).
--
Will Honea <whonea@codenet.net>
03-04-2004, 01:37 AM
#14
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
Bad idea, Bill. That tweeks the TPS positioning and range, generally
screwing up the whole works across the full throttle range. BTDT.
On Wed, 3 Mar 2004 23:47:47 UTC L.W.(ßill) ------ III
<----------@***.net> wrote:
> If all else fails cut a tin can material to cover the ports under
> the step motor. and set the idle via the throttle butterfly stop screw.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
> >
> > My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> > "idle air control motor" and it seems to make no difference. The engine will
> > idle properly in the 6-700rpm range for a while then it will surge to anywhere
> > between 1000 and 2000rpm and remain there indefinitely. The only way I have
> > been able to limit the rpms to a manageble range is by blocking off a major
> > part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> > JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> > problem?
> > tia dw
--
Will Honea <whonea@codenet.net>
screwing up the whole works across the full throttle range. BTDT.
On Wed, 3 Mar 2004 23:47:47 UTC L.W.(ßill) ------ III
<----------@***.net> wrote:
> If all else fails cut a tin can material to cover the ports under
> the step motor. and set the idle via the throttle butterfly stop screw.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
> >
> > My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> > "idle air control motor" and it seems to make no difference. The engine will
> > idle properly in the 6-700rpm range for a while then it will surge to anywhere
> > between 1000 and 2000rpm and remain there indefinitely. The only way I have
> > been able to limit the rpms to a manageble range is by blocking off a major
> > part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> > JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> > problem?
> > tia dw
--
Will Honea <whonea@codenet.net>
03-04-2004, 01:37 AM
#15
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
Bad idea, Bill. That tweeks the TPS positioning and range, generally
screwing up the whole works across the full throttle range. BTDT.
On Wed, 3 Mar 2004 23:47:47 UTC L.W.(ßill) ------ III
<----------@***.net> wrote:
> If all else fails cut a tin can material to cover the ports under
> the step motor. and set the idle via the throttle butterfly stop screw.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
> >
> > My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> > "idle air control motor" and it seems to make no difference. The engine will
> > idle properly in the 6-700rpm range for a while then it will surge to anywhere
> > between 1000 and 2000rpm and remain there indefinitely. The only way I have
> > been able to limit the rpms to a manageble range is by blocking off a major
> > part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> > JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> > problem?
> > tia dw
--
Will Honea <whonea@codenet.net>
screwing up the whole works across the full throttle range. BTDT.
On Wed, 3 Mar 2004 23:47:47 UTC L.W.(ßill) ------ III
<----------@***.net> wrote:
> If all else fails cut a tin can material to cover the ports under
> the step motor. and set the idle via the throttle butterfly stop screw.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
> >
> > My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> > "idle air control motor" and it seems to make no difference. The engine will
> > idle properly in the 6-700rpm range for a while then it will surge to anywhere
> > between 1000 and 2000rpm and remain there indefinitely. The only way I have
> > been able to limit the rpms to a manageble range is by blocking off a major
> > part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> > JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> > problem?
> > tia dw
--
Will Honea <whonea@codenet.net>
03-04-2004, 01:37 AM
#16
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
Bad idea, Bill. That tweeks the TPS positioning and range, generally
screwing up the whole works across the full throttle range. BTDT.
On Wed, 3 Mar 2004 23:47:47 UTC L.W.(ßill) ------ III
<----------@***.net> wrote:
> If all else fails cut a tin can material to cover the ports under
> the step motor. and set the idle via the throttle butterfly stop screw.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
> >
> > My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> > "idle air control motor" and it seems to make no difference. The engine will
> > idle properly in the 6-700rpm range for a while then it will surge to anywhere
> > between 1000 and 2000rpm and remain there indefinitely. The only way I have
> > been able to limit the rpms to a manageble range is by blocking off a major
> > part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> > JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> > problem?
> > tia dw
--
Will Honea <whonea@codenet.net>
screwing up the whole works across the full throttle range. BTDT.
On Wed, 3 Mar 2004 23:47:47 UTC L.W.(ßill) ------ III
<----------@***.net> wrote:
> If all else fails cut a tin can material to cover the ports under
> the step motor. and set the idle via the throttle butterfly stop screw.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
> >
> > My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> > "idle air control motor" and it seems to make no difference. The engine will
> > idle properly in the 6-700rpm range for a while then it will surge to anywhere
> > between 1000 and 2000rpm and remain there indefinitely. The only way I have
> > been able to limit the rpms to a manageble range is by blocking off a major
> > part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> > JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> > problem?
> > tia dw
--
Will Honea <whonea@codenet.net>
03-04-2004, 02:03 AM
#17
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
Well the engine no longer has an increased cold idle, or increases
in RPM when I turn the lights on, nor Air conditioning, but it hasn't
pull my wife down the road at sixty miles an hour without brakes, again.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Will Honea wrote:
>
> Bad idea, Bill. That tweeks the TPS positioning and range, generally
> screwing up the whole works across the full throttle range. BTDT.
in RPM when I turn the lights on, nor Air conditioning, but it hasn't
pull my wife down the road at sixty miles an hour without brakes, again.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Will Honea wrote:
>
> Bad idea, Bill. That tweeks the TPS positioning and range, generally
> screwing up the whole works across the full throttle range. BTDT.
03-04-2004, 02:03 AM
#18
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
Well the engine no longer has an increased cold idle, or increases
in RPM when I turn the lights on, nor Air conditioning, but it hasn't
pull my wife down the road at sixty miles an hour without brakes, again.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Will Honea wrote:
>
> Bad idea, Bill. That tweeks the TPS positioning and range, generally
> screwing up the whole works across the full throttle range. BTDT.
in RPM when I turn the lights on, nor Air conditioning, but it hasn't
pull my wife down the road at sixty miles an hour without brakes, again.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Will Honea wrote:
>
> Bad idea, Bill. That tweeks the TPS positioning and range, generally
> screwing up the whole works across the full throttle range. BTDT.
03-04-2004, 02:03 AM
#19
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
Well the engine no longer has an increased cold idle, or increases
in RPM when I turn the lights on, nor Air conditioning, but it hasn't
pull my wife down the road at sixty miles an hour without brakes, again.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Will Honea wrote:
>
> Bad idea, Bill. That tweeks the TPS positioning and range, generally
> screwing up the whole works across the full throttle range. BTDT.
in RPM when I turn the lights on, nor Air conditioning, but it hasn't
pull my wife down the road at sixty miles an hour without brakes, again.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Will Honea wrote:
>
> Bad idea, Bill. That tweeks the TPS positioning and range, generally
> screwing up the whole works across the full throttle range. BTDT.
03-06-2004, 03:47 PM
#20
Guest
Posts: n/a
Re: Idle setting on 4.0 TJ
tps sending the incorrect info to the pcm.
common failure
Dalewhite wrote:
> My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> "idle air control motor" and it seems to make no difference. The engine will
> idle properly in the 6-700rpm range for a while then it will surge to anywhere
> between 1000 and 2000rpm and remain there indefinitely. The only way I have
> been able to limit the rpms to a manageble range is by blocking off a major
> part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> problem?
> tia dw
common failure
Dalewhite wrote:
> My idle has decided to run amok. My Jeep mechanic guru has swapped out the
> "idle air control motor" and it seems to make no difference. The engine will
> idle properly in the 6-700rpm range for a while then it will surge to anywhere
> between 1000 and 2000rpm and remain there indefinitely. The only way I have
> been able to limit the rpms to a manageble range is by blocking off a major
> part of the "idle air control passage inlet" (ref. page 14-45, SERVICE MANUAL ,
> JEEP WRANGLER). Can anyone suggest a procedure to isolate and identify the
> problem?
> tia dw