Rough Idle 2004 Grand Cherokee 4.7L
05-20-2007, 07:31 PM
#1
Guest
Posts: n/a
Rough Idle 2004 Grand Cherokee 4.7L
Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
had it to the dealer, (tune up at 40K miles w/platinum plugs) and
still when you first start the car is when it's the worst. Has a rough
idle. When the RPM's are raised it smooths out. Still averaging ~18
MPG...but the rough idle is a nusiance.
Took the car to our local service center. They could find nothing
wrong! Cleaned the throttle body and added a cleaner to the tank.
Still NO good. Wife loves this Jeep!
Hoping someone has lucked into the problem and knows the fix.
Dan in TN
had it to the dealer, (tune up at 40K miles w/platinum plugs) and
still when you first start the car is when it's the worst. Has a rough
idle. When the RPM's are raised it smooths out. Still averaging ~18
MPG...but the rough idle is a nusiance.
Took the car to our local service center. They could find nothing
wrong! Cleaned the throttle body and added a cleaner to the tank.
Still NO good. Wife loves this Jeep!
Hoping someone has lucked into the problem and knows the fix.
Dan in TN
05-21-2007, 10:36 AM
#2
Guest
Posts: n/a
Re: Rough Idle 2004 Grand Cherokee 4.7L
On May 20, 7:31 pm, Dano <ybego...@msn.com> wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
This sounds like idle air control motor. These can get pretty dirty
and cause idle problems, but are easy to clean (30-min job) with some
carb cleaner spray.
See the "Cleaning the throttle body and IAC plunger" section at
http://www.wjjeeps.com/service/tbody.htm
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
This sounds like idle air control motor. These can get pretty dirty
and cause idle problems, but are easy to clean (30-min job) with some
carb cleaner spray.
See the "Cleaning the throttle body and IAC plunger" section at
http://www.wjjeeps.com/service/tbody.htm
05-21-2007, 10:36 AM
#3
Guest
Posts: n/a
Re: Rough Idle 2004 Grand Cherokee 4.7L
On May 20, 7:31 pm, Dano <ybego...@msn.com> wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
This sounds like idle air control motor. These can get pretty dirty
and cause idle problems, but are easy to clean (30-min job) with some
carb cleaner spray.
See the "Cleaning the throttle body and IAC plunger" section at
http://www.wjjeeps.com/service/tbody.htm
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
This sounds like idle air control motor. These can get pretty dirty
and cause idle problems, but are easy to clean (30-min job) with some
carb cleaner spray.
See the "Cleaning the throttle body and IAC plunger" section at
http://www.wjjeeps.com/service/tbody.htm
05-21-2007, 10:36 AM
#4
Guest
Posts: n/a
Re: Rough Idle 2004 Grand Cherokee 4.7L
On May 20, 7:31 pm, Dano <ybego...@msn.com> wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
This sounds like idle air control motor. These can get pretty dirty
and cause idle problems, but are easy to clean (30-min job) with some
carb cleaner spray.
See the "Cleaning the throttle body and IAC plunger" section at
http://www.wjjeeps.com/service/tbody.htm
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
This sounds like idle air control motor. These can get pretty dirty
and cause idle problems, but are easy to clean (30-min job) with some
carb cleaner spray.
See the "Cleaning the throttle body and IAC plunger" section at
http://www.wjjeeps.com/service/tbody.htm
05-21-2007, 10:36 AM
#5
Guest
Posts: n/a
Re: Rough Idle 2004 Grand Cherokee 4.7L
On May 20, 7:31 pm, Dano <ybego...@msn.com> wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
This sounds like idle air control motor. These can get pretty dirty
and cause idle problems, but are easy to clean (30-min job) with some
carb cleaner spray.
See the "Cleaning the throttle body and IAC plunger" section at
http://www.wjjeeps.com/service/tbody.htm
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
This sounds like idle air control motor. These can get pretty dirty
and cause idle problems, but are easy to clean (30-min job) with some
carb cleaner spray.
See the "Cleaning the throttle body and IAC plunger" section at
http://www.wjjeeps.com/service/tbody.htm
05-26-2007, 08:54 AM
#6
Guest
Posts: n/a
Re: Rough Idle 2004 Grand Cherokee 4.7L
i would do a fuel system pressure check and go from there even going as
far as disabling each injector as it runs to see if the idle changes
Dano wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
far as disabling each injector as it runs to see if the idle changes
Dano wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
05-26-2007, 08:54 AM
#7
Guest
Posts: n/a
Re: Rough Idle 2004 Grand Cherokee 4.7L
i would do a fuel system pressure check and go from there even going as
far as disabling each injector as it runs to see if the idle changes
Dano wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
far as disabling each injector as it runs to see if the idle changes
Dano wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
05-26-2007, 08:54 AM
#8
Guest
Posts: n/a
Re: Rough Idle 2004 Grand Cherokee 4.7L
i would do a fuel system pressure check and go from there even going as
far as disabling each injector as it runs to see if the idle changes
Dano wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
far as disabling each injector as it runs to see if the idle changes
Dano wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
05-26-2007, 08:54 AM
#9
Guest
Posts: n/a
Re: Rough Idle 2004 Grand Cherokee 4.7L
i would do a fuel system pressure check and go from there even going as
far as disabling each injector as it runs to see if the idle changes
Dano wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
far as disabling each injector as it runs to see if the idle changes
Dano wrote:
> Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> still when you first start the car is when it's the worst. Has a rough
> idle. When the RPM's are raised it smooths out. Still averaging ~18
> MPG...but the rough idle is a nusiance.
>
> Took the car to our local service center. They could find nothing
> wrong! Cleaned the throttle body and added a cleaner to the tank.
> Still NO good. Wife loves this Jeep!
>
> Hoping someone has lucked into the problem and knows the fix.
> Dan in TN
05-28-2007, 02:51 PM
#10
Guest
Posts: n/a
Re: Rough Idle 2004 Grand Cherokee 4.7L
On May 21, 7:36 am, TakeFlight <erik.j.c...@gmail.com> wrote:
> On May 20, 7:31 pm, Dano <ybego...@msn.com> wrote:
>
> > Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> > had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> > still when you first start the car is when it's the worst. Has arough
> >idle. When the RPM's are raised it smooths out. Still averaging ~18
> > MPG...but theroughidleis a nusiance.
>
> > Took the car to our local service center. They could find nothing
> > wrong! Cleaned the throttle body and added a cleaner to the tank.
> > Still NO good. Wife loves this Jeep!
>
> > Hoping someone has lucked into the problem and knows the fix.
> > Dan in TN
>
> This sounds likeidleair control motor. These can get pretty dirty
> and causeidleproblems, but are easy to clean (30-min job) with some
> carb cleaner spray.
>
> See the "Cleaning the throttle body and IAC plunger" section athttp://www.wjjeeps.com/service/tbody.htm
I cleaned the IAC plunger on the 04 GR today. Made ALL the difference
in the world! RUNS and IDLES FLAWLESSLY! THANK YOU!!! Quite a bit
of carbon build up and cleaned with carb cleaner.
Thank you again!
Dan in TN
> On May 20, 7:31 pm, Dano <ybego...@msn.com> wrote:
>
> > Hope someone can help. Wife has the '04 GC with 4.7L HO AWD. We've
> > had it to the dealer, (tune up at 40K miles w/platinum plugs) and
> > still when you first start the car is when it's the worst. Has arough
> >idle. When the RPM's are raised it smooths out. Still averaging ~18
> > MPG...but theroughidleis a nusiance.
>
> > Took the car to our local service center. They could find nothing
> > wrong! Cleaned the throttle body and added a cleaner to the tank.
> > Still NO good. Wife loves this Jeep!
>
> > Hoping someone has lucked into the problem and knows the fix.
> > Dan in TN
>
> This sounds likeidleair control motor. These can get pretty dirty
> and causeidleproblems, but are easy to clean (30-min job) with some
> carb cleaner spray.
>
> See the "Cleaning the throttle body and IAC plunger" section athttp://www.wjjeeps.com/service/tbody.htm
I cleaned the IAC plunger on the 04 GR today. Made ALL the difference
in the world! RUNS and IDLES FLAWLESSLY! THANK YOU!!! Quite a bit
of carbon build up and cleaned with carb cleaner.
Thank you again!
Dan in TN