97 ZJ V8 JGC Wont idle when cold
 

Greetings,

My 1997 ZJ will not idle when cold.

It happened 2 weeks ago and we cleaned the battery terminals, checked
grounds, and it all seemed good. After the cleaning truck ran fine. it
has about 75,000 miles on it an i take good care of it.

But this morning it was about 37 degrees, and it wont idle unless you
run it at about 1500 RPM.

After warming up , engine would idle normally. Have checked the
alternator
voltage, no codes appear other than the 55 code.

Any pointer appreciated, regards,

james

Re: 97 ZJ V8 JGC Wont idle when cold
 

Excerpt from the '96 ZJ manual engine diagnosis 'Rough Idle"

http://i112.photobucket.com/albums/n...JRoughIdle.jpg


While not required a thorough cleaning of the throttle body assemble, Idle
air passages, fuel system and injectors wouldn't hurt and only costs $12-$20
depending on brands and how thorough you need or want to clean.


"jamest" <jamest@sympatico.ca> wrote in message
news:1161444065.150595.311440@e3g2000cwe.googlegro ups.com...
> Greetings,
>
> My 1997 ZJ will not idle when cold.
>
> It happened 2 weeks ago and we cleaned the battery terminals, checked
> grounds, and it all seemed good. After the cleaning truck ran fine. it
> has about 75,000 miles on it an i take good care of it.
>
> But this morning it was about 37 degrees, and it wont idle unless you
> run it at about 1500 RPM.
>
> After warming up , engine would idle normally. Have checked the
> alternator
> voltage, no codes appear other than the 55 code.
>
> Any pointer appreciated, regards,
>
> james
>

Re: 97 ZJ V8 JGC Wont idle when cold
 

Excerpt from the '96 ZJ manual engine diagnosis 'Rough Idle"

http://i112.photobucket.com/albums/n...JRoughIdle.jpg


While not required a thorough cleaning of the throttle body assemble, Idle
air passages, fuel system and injectors wouldn't hurt and only costs $12-$20
depending on brands and how thorough you need or want to clean.


"jamest" <jamest@sympatico.ca> wrote in message
news:1161444065.150595.311440@e3g2000cwe.googlegro ups.com...
> Greetings,
>
> My 1997 ZJ will not idle when cold.
>
> It happened 2 weeks ago and we cleaned the battery terminals, checked
> grounds, and it all seemed good. After the cleaning truck ran fine. it
> has about 75,000 miles on it an i take good care of it.
>
> But this morning it was about 37 degrees, and it wont idle unless you
> run it at about 1500 RPM.
>
> After warming up , engine would idle normally. Have checked the
> alternator
> voltage, no codes appear other than the 55 code.
>
> Any pointer appreciated, regards,
>
> james
>

Re: 97 ZJ V8 JGC Wont idle when cold
 

Excerpt from the '96 ZJ manual engine diagnosis 'Rough Idle"

http://i112.photobucket.com/albums/n...JRoughIdle.jpg


While not required a thorough cleaning of the throttle body assemble, Idle
air passages, fuel system and injectors wouldn't hurt and only costs $12-$20
depending on brands and how thorough you need or want to clean.


"jamest" <jamest@sympatico.ca> wrote in message
news:1161444065.150595.311440@e3g2000cwe.googlegro ups.com...
> Greetings,
>
> My 1997 ZJ will not idle when cold.
>
> It happened 2 weeks ago and we cleaned the battery terminals, checked
> grounds, and it all seemed good. After the cleaning truck ran fine. it
> has about 75,000 miles on it an i take good care of it.
>
> But this morning it was about 37 degrees, and it wont idle unless you
> run it at about 1500 RPM.
>
> After warming up , engine would idle normally. Have checked the
> alternator
> voltage, no codes appear other than the 55 code.
>
> Any pointer appreciated, regards,
>
> james
>

Re: 97 ZJ V8 JGC Wont idle when cold - Solved
 

billy ray is the man!! - Thanks

$10 - Poured in a bottle of fuel system/injector cleaner into a full
tank of gas .
Seemd a little better...
$10 - Sprayed in TB cleaner and took it out for run on the freeway.
Better yet...
$80 - Picked up a new IAC Motor and changed it ( the old one was carbon
city ).
Sprayed a little TB cleaner in the IAC air passage and wiped out a lot
of carbon from there.
WOW..

It didnt run this smooth the day I bought it. Amazing, best $100 i ever
spent on it.

Thanks Again
jamest

billy ray wrote:
> Excerpt from the '96 ZJ manual engine diagnosis 'Rough Idle"
>
> http://i112.photobucket.com/albums/n...JRoughIdle.jpg
>
>
> While not required a thorough cleaning of the throttle body assemble, Idle
> air passages, fuel system and injectors wouldn't hurt and only costs $12-$20
> depending on brands and how thorough you need or want to clean.
>
>
> "jamest" <jamest@sympatico.ca> wrote in message
> news:1161444065.150595.311440@e3g2000cwe.googlegro ups.com...
> > Greetings,
> >
> > My 1997 ZJ will not idle when cold.
> >
> > It happened 2 weeks ago and we cleaned the battery terminals, checked
> > grounds, and it all seemed good. After the cleaning truck ran fine. it
> > has about 75,000 miles on it an i take good care of it.
> >
> > But this morning it was about 37 degrees, and it wont idle unless you
> > run it at about 1500 RPM.
> >
> > After warming up , engine would idle normally. Have checked the
> > alternator
> > voltage, no codes appear other than the 55 code.
> >
> > Any pointer appreciated, regards,
> >
> > james
> >

Re: 97 ZJ V8 JGC Wont idle when cold - Solved
 

billy ray is the man!! - Thanks

$10 - Poured in a bottle of fuel system/injector cleaner into a full
tank of gas .
Seemd a little better...
$10 - Sprayed in TB cleaner and took it out for run on the freeway.
Better yet...
$80 - Picked up a new IAC Motor and changed it ( the old one was carbon
city ).
Sprayed a little TB cleaner in the IAC air passage and wiped out a lot
of carbon from there.
WOW..

It didnt run this smooth the day I bought it. Amazing, best $100 i ever
spent on it.

Thanks Again
jamest

billy ray wrote:
> Excerpt from the '96 ZJ manual engine diagnosis 'Rough Idle"
>
> http://i112.photobucket.com/albums/n...JRoughIdle.jpg
>
>
> While not required a thorough cleaning of the throttle body assemble, Idle
> air passages, fuel system and injectors wouldn't hurt and only costs $12-$20
> depending on brands and how thorough you need or want to clean.
>
>
> "jamest" <jamest@sympatico.ca> wrote in message
> news:1161444065.150595.311440@e3g2000cwe.googlegro ups.com...
> > Greetings,
> >
> > My 1997 ZJ will not idle when cold.
> >
> > It happened 2 weeks ago and we cleaned the battery terminals, checked
> > grounds, and it all seemed good. After the cleaning truck ran fine. it
> > has about 75,000 miles on it an i take good care of it.
> >
> > But this morning it was about 37 degrees, and it wont idle unless you
> > run it at about 1500 RPM.
> >
> > After warming up , engine would idle normally. Have checked the
> > alternator
> > voltage, no codes appear other than the 55 code.
> >
> > Any pointer appreciated, regards,
> >
> > james
> >

Re: 97 ZJ V8 JGC Wont idle when cold - Solved
 

billy ray is the man!! - Thanks

$10 - Poured in a bottle of fuel system/injector cleaner into a full
tank of gas .
Seemd a little better...
$10 - Sprayed in TB cleaner and took it out for run on the freeway.
Better yet...
$80 - Picked up a new IAC Motor and changed it ( the old one was carbon
city ).
Sprayed a little TB cleaner in the IAC air passage and wiped out a lot
of carbon from there.
WOW..

It didnt run this smooth the day I bought it. Amazing, best $100 i ever
spent on it.

Thanks Again
jamest

billy ray wrote:
> Excerpt from the '96 ZJ manual engine diagnosis 'Rough Idle"
>
> http://i112.photobucket.com/albums/n...JRoughIdle.jpg
>
>
> While not required a thorough cleaning of the throttle body assemble, Idle
> air passages, fuel system and injectors wouldn't hurt and only costs $12-$20
> depending on brands and how thorough you need or want to clean.
>
>
> "jamest" <jamest@sympatico.ca> wrote in message
> news:1161444065.150595.311440@e3g2000cwe.googlegro ups.com...
> > Greetings,
> >
> > My 1997 ZJ will not idle when cold.
> >
> > It happened 2 weeks ago and we cleaned the battery terminals, checked
> > grounds, and it all seemed good. After the cleaning truck ran fine. it
> > has about 75,000 miles on it an i take good care of it.
> >
> > But this morning it was about 37 degrees, and it wont idle unless you
> > run it at about 1500 RPM.
> >
> > After warming up , engine would idle normally. Have checked the
> > alternator
> > voltage, no codes appear other than the 55 code.
> >
> > Any pointer appreciated, regards,
> >
> > james
> >

Re: 97 ZJ V8 JGC Wont idle when cold - Solved
 

You could probably have saved $80 by cleaning the old IAC and the
passages. As one last tweek, there is an idle bypass port with an
adjustment screw under one of those "tamper proof" covers. When I got
this Jeep, it was so plugged I had to look close to find the top of
the hole! That one took a long drill bit and nearly a can of cleaner
to open up - it runs all the way down into the manifold and you have
to remove the jet screw (count the turns!) to get all the way down
from the top of the throttle body.

On Wed, 25 Oct 2006 17:23:31 UTC "jamest" <jamest@sympatico.ca> wrote:

> billy ray is the man!! - Thanks
>
> $10 - Poured in a bottle of fuel system/injector cleaner into a full
> tank of gas .
> Seemd a little better...
> $10 - Sprayed in TB cleaner and took it out for run on the freeway.
> Better yet...
> $80 - Picked up a new IAC Motor and changed it ( the old one was carbon
> city ).
> Sprayed a little TB cleaner in the IAC air passage and wiped out a lot
> of carbon from there.
> WOW..
>
> It didnt run this smooth the day I bought it. Amazing, best $100 i ever
> spent on it.
>
> Thanks Again
> jamest
>
> billy ray wrote:
> > Excerpt from the '96 ZJ manual engine diagnosis 'Rough Idle"
> >
> > http://i112.photobucket.com/albums/n...JRoughIdle.jpg
> >
> >
> > While not required a thorough cleaning of the throttle body assemble, Idle
> > air passages, fuel system and injectors wouldn't hurt and only costs $12-$20
> > depending on brands and how thorough you need or want to clean.
> >
> >
> > "jamest" <jamest@sympatico.ca> wrote in message
> > news:1161444065.150595.311440@e3g2000cwe.googlegro ups.com...
> > > Greetings,
> > >
> > > My 1997 ZJ will not idle when cold.
> > >
> > > It happened 2 weeks ago and we cleaned the battery terminals, checked
> > > grounds, and it all seemed good. After the cleaning truck ran fine. it
> > > has about 75,000 miles on it an i take good care of it.
> > >
> > > But this morning it was about 37 degrees, and it wont idle unless you
> > > run it at about 1500 RPM.
> > >
> > > After warming up , engine would idle normally. Have checked the
> > > alternator
> > > voltage, no codes appear other than the 55 code.
> > >
> > > Any pointer appreciated, regards,
> > >
> > > james
> > >
>


--
Will Honea

Re: 97 ZJ V8 JGC Wont idle when cold - Solved
 

You could probably have saved $80 by cleaning the old IAC and the
passages. As one last tweek, there is an idle bypass port with an
adjustment screw under one of those "tamper proof" covers. When I got
this Jeep, it was so plugged I had to look close to find the top of
the hole! That one took a long drill bit and nearly a can of cleaner
to open up - it runs all the way down into the manifold and you have
to remove the jet screw (count the turns!) to get all the way down
from the top of the throttle body.

On Wed, 25 Oct 2006 17:23:31 UTC "jamest" <jamest@sympatico.ca> wrote:

> billy ray is the man!! - Thanks
>
> $10 - Poured in a bottle of fuel system/injector cleaner into a full
> tank of gas .
> Seemd a little better...
> $10 - Sprayed in TB cleaner and took it out for run on the freeway.
> Better yet...
> $80 - Picked up a new IAC Motor and changed it ( the old one was carbon
> city ).
> Sprayed a little TB cleaner in the IAC air passage and wiped out a lot
> of carbon from there.
> WOW..
>
> It didnt run this smooth the day I bought it. Amazing, best $100 i ever
> spent on it.
>
> Thanks Again
> jamest
>
> billy ray wrote:
> > Excerpt from the '96 ZJ manual engine diagnosis 'Rough Idle"
> >
> > http://i112.photobucket.com/albums/n...JRoughIdle.jpg
> >
> >
> > While not required a thorough cleaning of the throttle body assemble, Idle
> > air passages, fuel system and injectors wouldn't hurt and only costs $12-$20
> > depending on brands and how thorough you need or want to clean.
> >
> >
> > "jamest" <jamest@sympatico.ca> wrote in message
> > news:1161444065.150595.311440@e3g2000cwe.googlegro ups.com...
> > > Greetings,
> > >
> > > My 1997 ZJ will not idle when cold.
> > >
> > > It happened 2 weeks ago and we cleaned the battery terminals, checked
> > > grounds, and it all seemed good. After the cleaning truck ran fine. it
> > > has about 75,000 miles on it an i take good care of it.
> > >
> > > But this morning it was about 37 degrees, and it wont idle unless you
> > > run it at about 1500 RPM.
> > >
> > > After warming up , engine would idle normally. Have checked the
> > > alternator
> > > voltage, no codes appear other than the 55 code.
> > >
> > > Any pointer appreciated, regards,
> > >
> > > james
> > >
>


--
Will Honea

Re: 97 ZJ V8 JGC Wont idle when cold - Solved
 

You could probably have saved $80 by cleaning the old IAC and the
passages. As one last tweek, there is an idle bypass port with an
adjustment screw under one of those "tamper proof" covers. When I got
this Jeep, it was so plugged I had to look close to find the top of
the hole! That one took a long drill bit and nearly a can of cleaner
to open up - it runs all the way down into the manifold and you have
to remove the jet screw (count the turns!) to get all the way down
from the top of the throttle body.

On Wed, 25 Oct 2006 17:23:31 UTC "jamest" <jamest@sympatico.ca> wrote:

> billy ray is the man!! - Thanks
>
> $10 - Poured in a bottle of fuel system/injector cleaner into a full
> tank of gas .
> Seemd a little better...
> $10 - Sprayed in TB cleaner and took it out for run on the freeway.
> Better yet...
> $80 - Picked up a new IAC Motor and changed it ( the old one was carbon
> city ).
> Sprayed a little TB cleaner in the IAC air passage and wiped out a lot
> of carbon from there.
> WOW..
>
> It didnt run this smooth the day I bought it. Amazing, best $100 i ever
> spent on it.
>
> Thanks Again
> jamest
>
> billy ray wrote:
> > Excerpt from the '96 ZJ manual engine diagnosis 'Rough Idle"
> >
> > http://i112.photobucket.com/albums/n...JRoughIdle.jpg
> >
> >
> > While not required a thorough cleaning of the throttle body assemble, Idle
> > air passages, fuel system and injectors wouldn't hurt and only costs $12-$20
> > depending on brands and how thorough you need or want to clean.
> >
> >
> > "jamest" <jamest@sympatico.ca> wrote in message
> > news:1161444065.150595.311440@e3g2000cwe.googlegro ups.com...
> > > Greetings,
> > >
> > > My 1997 ZJ will not idle when cold.
> > >
> > > It happened 2 weeks ago and we cleaned the battery terminals, checked
> > > grounds, and it all seemed good. After the cleaning truck ran fine. it
> > > has about 75,000 miles on it an i take good care of it.
> > >
> > > But this morning it was about 37 degrees, and it wont idle unless you
> > > run it at about 1500 RPM.
> > >
> > > After warming up , engine would idle normally. Have checked the
> > > alternator
> > > voltage, no codes appear other than the 55 code.
> > >
> > > Any pointer appreciated, regards,
> > >
> > > james
> > >
>


--
Will Honea