2004 Jeep Liberty

I have a 2004 Jeep Liberty and the engine is misfiring. If it was my old 2003 Ford F150, I'd know to change out a coil. Is there something similar in the engine of this model Jeep that I can change easily?

Thanks,

Mike

Michael wrote:
> I have a 2004 Jeep Liberty and the engine is misfiring. If it was my
> old 2003 Ford F150, I'd know to change out a coil. Is there something
> similar in the engine of this model Jeep that I can change easily?
>
> Thanks,
>
> Mike

It uses COP units, coil on plug. Easy to change IF they are the issue.
When was the last time the plugs were changed? These do not use a high
mileage plug, they use a copper plug that needs to be changed every 35K
or they start misfiring, If you install any of the platinum or iridium
plugs they tend to mis-fire as well.

There is one copper core with platinum tip that works OK but they are
hard to find.

If you have multiple mis-fires you will want to check the fuel pump
output and make sure you are getting good flow.
--
Steve W.

On Wednesday, May 10, 2017 at 1:12:11 AM UTC-5, Steve W. wrote:
> Michael wrote:
> > I have a 2004 Jeep Liberty and the engine is misfiring. If it was my
> > old 2003 Ford F150, I'd know to change out a coil. Is there something
> > similar in the engine of this model Jeep that I can change easily?
> >
> > Thanks,
> >
> > Mike
>
> It uses COP units, coil on plug. Easy to change IF they are the issue.
> When was the last time the plugs were changed? These do not use a high
> mileage plug, they use a copper plug that needs to be changed every 35K
> or they start misfiring, If you install any of the platinum or iridium
> plugs they tend to mis-fire as well.
>
> There is one copper core with platinum tip that works OK but they are
> hard to find.
>
> If you have multiple mis-fires you will want to check the fuel pump
> output and make sure you are getting good flow.
> --
> Steve W.

Thanks, Steve!

Mike

On Thursday, May 11, 2017 at 5:44:58 PM UTC-5, Michael wrote:
> On Wednesday, May 10, 2017 at 1:12:11 AM UTC-5, Steve W. wrote:
> > Michael wrote:
> > > I have a 2004 Jeep Liberty and the engine is misfiring. If it was my
> > > old 2003 Ford F150, I'd know to change out a coil. Is there something
> > > similar in the engine of this model Jeep that I can change easily?
> > >
> > > Thanks,
> > >
> > > Mike
> >
> > It uses COP units, coil on plug. Easy to change IF they are the issue.
> > When was the last time the plugs were changed? These do not use a high
> > mileage plug, they use a copper plug that needs to be changed every 35K
> > or they start misfiring, If you install any of the platinum or iridium
> > plugs they tend to mis-fire as well.
> >
> > There is one copper core with platinum tip that works OK but they are
> > hard to find.
> >
> > If you have multiple mis-fires you will want to check the fuel pump
> > output and make sure you are getting good flow.
> > --
> > Steve W.
>
> Thanks, Steve!
>
> Mike

So I've changed the plugs and coils, but I'm still getting misfires according to the machine from Autozone. What's the next thing that I should check?

Thanks,

Mike

On 5/23/17 3:29 PM, Michael wrote:
> On Thursday, May 11, 2017 at 5:44:58 PM UTC-5, Michael wrote:
>> On Wednesday, May 10, 2017 at 1:12:11 AM UTC-5, Steve W. wrote:
>>> Michael wrote:
>>>> I have a 2004 Jeep Liberty and the engine is misfiring. If it was my
>>>> old 2003 Ford F150, I'd know to change out a coil. Is there something
>>>> similar in the engine of this model Jeep that I can change easily?
>>>>
>>>> Thanks,
>>>>
>>>> Mike
>>>
>>> It uses COP units, coil on plug. Easy to change IF they are the issue.
>>> When was the last time the plugs were changed? These do not use a high
>>> mileage plug, they use a copper plug that needs to be changed every 35K
>>> or they start misfiring, If you install any of the platinum or iridium
>>> plugs they tend to mis-fire as well.
>>>
>>> There is one copper core with platinum tip that works OK but they are
>>> hard to find.
>>>
>>> If you have multiple mis-fires you will want to check the fuel pump
>>> output and make sure you are getting good flow.
>>> --
>>> Steve W.
>>
>> Thanks, Steve!
>>
>> Mike
>
> So I've changed the plugs and coils, but I'm still getting misfires according to the machine from Autozone. What's the next thing that I should check?
>
> Thanks,
>
> Mike
>

Add a bottle of "Techron®" Fuel Injector Cleaner to the gas tank.

Michael wrote:
> On Thursday, May 11, 2017 at 5:44:58 PM UTC-5, Michael wrote:
>> On Wednesday, May 10, 2017 at 1:12:11 AM UTC-5, Steve W. wrote:
>>> Michael wrote:
>>>> I have a 2004 Jeep Liberty and the engine is misfiring. If it
>>>> was my old 2003 Ford F150, I'd know to change out a coil. Is
>>>> there something similar in the engine of this model Jeep that I
>>>> can change easily?
>>>>
>>>> Thanks,
>>>>
>>>> Mike
>>> It uses COP units, coil on plug. Easy to change IF they are the
>>> issue. When was the last time the plugs were changed? These do
>>> not use a high mileage plug, they use a copper plug that needs to
>>> be changed every 35K or they start misfiring, If you install any
>>> of the platinum or iridium plugs they tend to mis-fire as well.
>>>
>>> There is one copper core with platinum tip that works OK but they
>>> are hard to find.
>>>
>>> If you have multiple mis-fires you will want to check the fuel
>>> pump output and make sure you are getting good flow. -- Steve W.
>> Thanks, Steve!
>>
>> Mike
>
> So I've changed the plugs and coils, but I'm still getting misfires
> according to the machine from Autozone. What's the next thing that I
> should check?
>
> Thanks,
>
> Mike

What were the codes that came up? Any strange noises or other problems
like lower gas mileage, running hotter than normal, smell of fuel?

--
Steve W.

On Tuesday, May 23, 2017 at 8:32:31 PM UTC-5, Steve W. wrote:
> Michael wrote:
> > On Thursday, May 11, 2017 at 5:44:58 PM UTC-5, Michael wrote:
> >> On Wednesday, May 10, 2017 at 1:12:11 AM UTC-5, Steve W. wrote:
> >>> Michael wrote:
> >>>> I have a 2004 Jeep Liberty and the engine is misfiring. If it
> >>>> was my old 2003 Ford F150, I'd know to change out a coil. Is
> >>>> there something similar in the engine of this model Jeep that I
> >>>> can change easily?
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Mike
> >>> It uses COP units, coil on plug. Easy to change IF they are the
> >>> issue. When was the last time the plugs were changed? These do
> >>> not use a high mileage plug, they use a copper plug that needs to
> >>> be changed every 35K or they start misfiring, If you install any
> >>> of the platinum or iridium plugs they tend to mis-fire as well.
> >>>
> >>> There is one copper core with platinum tip that works OK but they
> >>> are hard to find.
> >>>
> >>> If you have multiple mis-fires you will want to check the fuel
> >>> pump output and make sure you are getting good flow. -- Steve W.
> >> Thanks, Steve!
> >>
> >> Mike
> >
> > So I've changed the plugs and coils, but I'm still getting misfires
> > according to the machine from Autozone. What's the next thing that I
> > should check?
> >
> > Thanks,
> >
> > Mike
>
> What were the codes that came up? Any strange noises or other problems
> like lower gas mileage, running hotter than normal, smell of fuel?
>
> --
> Steve W.

Hi Steve,

Code P0306 indicates that Cylinder 6 has too many misfires within a predetermined period of time.

PO306 Cylinder 1-10 Misfire Detected
P0300
P0302
P0303
P0304

Any thoughts would be greatly appreciated. I read where it could be a bad ASD relay too, but I couldn't find one on this car. I'm going to try the fuel injector cleaner. I may try replacing the fuel injectors at some point.

Thanks,

Mike

Michael > wrote in
:

> On Tuesday, May 23, 2017 at 8:32:31 PM UTC-5, Steve W. wrote:
>> Michael wrote:
>> > On Thursday, May 11, 2017 at 5:44:58 PM UTC-5, Michael wrote:
>> >> On Wednesday, May 10, 2017 at 1:12:11 AM UTC-5, Steve W. wrote:
>> >>> Michael wrote:
>> >>>> I have a 2004 Jeep Liberty and the engine is misfiring. If it
>> >>>> was my old 2003 Ford F150, I'd know to change out a coil. Is
>> >>>> there something similar in the engine of this model Jeep that I
>> >>>> can change easily?
>> >>>>
>> >>>> Thanks,
>> >>>>
>> >>>> Mike
>> >>> It uses COP units, coil on plug. Easy to change IF they are the
>> >>> issue. When was the last time the plugs were changed? These do
>> >>> not use a high mileage plug, they use a copper plug that needs to
>> >>> be changed every 35K or they start misfiring, If you install any
>> >>> of the platinum or iridium plugs they tend to mis-fire as well.
>> >>>
>> >>> There is one copper core with platinum tip that works OK but they
>> >>> are hard to find.
>> >>>
>> >>> If you have multiple mis-fires you will want to check the fuel
>> >>> pump output and make sure you are getting good flow. -- Steve W.
>> >> Thanks, Steve!
>> >>
>> >> Mike
>> >
>> > So I've changed the plugs and coils, but I'm still getting misfires
>> > according to the machine from Autozone. What's the next thing that
>> > I should check?
>> >
>> > Thanks,
>> >
>> > Mike
>>
>> What were the codes that came up? Any strange noises or other
>> problems like lower gas mileage, running hotter than normal, smell of
>> fuel?
>>
>> --
>> Steve W.
>
> Hi Steve,
>
> Code P0306 indicates that Cylinder 6 has too many misfires within a
> predetermined period of time.
>
> PO306 Cylinder 1-10 Misfire Detected
> P0300
> P0302
> P0303
> P0304
>
> Any thoughts would be greatly appreciated. I read where it could be a
> bad ASD relay too, but I couldn't find one on this car. I'm going to
> try the fuel injector cleaner. I may try replacing the fuel injectors
> at some point.
>
> Thanks,
>
> Mike
>

have you at least checked your compresion??? KB

On Wednesday, May 24, 2017 at 8:47:25 AM UTC-5, Kevin Bottorff wrote:
> Michael > wrote in
> :
>
> > On Tuesday, May 23, 2017 at 8:32:31 PM UTC-5, Steve W. wrote:
> >> Michael wrote:
> >> > On Thursday, May 11, 2017 at 5:44:58 PM UTC-5, Michael wrote:
> >> >> On Wednesday, May 10, 2017 at 1:12:11 AM UTC-5, Steve W. wrote:
> >> >>> Michael wrote:
> >> >>>> I have a 2004 Jeep Liberty and the engine is misfiring. If it
> >> >>>> was my old 2003 Ford F150, I'd know to change out a coil. Is
> >> >>>> there something similar in the engine of this model Jeep that I
> >> >>>> can change easily?
> >> >>>>
> >> >>>> Thanks,
> >> >>>>
> >> >>>> Mike
> >> >>> It uses COP units, coil on plug. Easy to change IF they are the
> >> >>> issue. When was the last time the plugs were changed? These do
> >> >>> not use a high mileage plug, they use a copper plug that needs to
> >> >>> be changed every 35K or they start misfiring, If you install any
> >> >>> of the platinum or iridium plugs they tend to mis-fire as well.
> >> >>>
> >> >>> There is one copper core with platinum tip that works OK but they
> >> >>> are hard to find.
> >> >>>
> >> >>> If you have multiple mis-fires you will want to check the fuel
> >> >>> pump output and make sure you are getting good flow. -- Steve W.
> >> >> Thanks, Steve!
> >> >>
> >> >> Mike
> >> >
> >> > So I've changed the plugs and coils, but I'm still getting misfires
> >> > according to the machine from Autozone. What's the next thing that
> >> > I should check?
> >> >
> >> > Thanks,
> >> >
> >> > Mike
> >>
> >> What were the codes that came up? Any strange noises or other
> >> problems like lower gas mileage, running hotter than normal, smell of
> >> fuel?
> >>
> >> --
> >> Steve W.
> >
> > Hi Steve,
> >
> > Code P0306 indicates that Cylinder 6 has too many misfires within a
> > predetermined period of time.
> >
> > PO306 Cylinder 1-10 Misfire Detected
> > P0300
> > P0302
> > P0303
> > P0304
> >
> > Any thoughts would be greatly appreciated. I read where it could be a
> > bad ASD relay too, but I couldn't find one on this car. I'm going to
> > try the fuel injector cleaner. I may try replacing the fuel injectors
> > at some point.
> >
> > Thanks,
> >
> > Mike
> >
>
> have you at least checked your compresion??? KB

Kevin, I don't have a compression gauge. I'm trying to do the easy and inexpensive things first before I take it to the shop.

Additional information. It runs well until I get it on the highway and get it warm. That's why it cuts out. And yes, as I walked away from the car yesterday, I did smell gasoline.

Thanks for all the help.

Mike

On Tuesday, May 23, 2017 at 9:29:30 AM UTC-10, Michael wrote:
> On Thursday, May 11, 2017 at 5:44:58 PM UTC-5, Michael wrote:
> > On Wednesday, May 10, 2017 at 1:12:11 AM UTC-5, Steve W. wrote:
> > > Michael wrote:
> > > > I have a 2004 Jeep Liberty and the engine is misfiring. If it was my
> > > > old 2003 Ford F150, I'd know to change out a coil. Is there something
> > > > similar in the engine of this model Jeep that I can change easily?
> > > >
> > > > Thanks,
> > > >
> > > > Mike
> > >
> > > It uses COP units, coil on plug. Easy to change IF they are the issue.
> > > When was the last time the plugs were changed? These do not use a high
> > > mileage plug, they use a copper plug that needs to be changed every 35K
> > > or they start misfiring, If you install any of the platinum or iridium
> > > plugs they tend to mis-fire as well.
> > >
> > > There is one copper core with platinum tip that works OK but they are
> > > hard to find.
> > >
> > > If you have multiple mis-fires you will want to check the fuel pump
> > > output and make sure you are getting good flow.
> > > --
> > > Steve W.
> >
> > Thanks, Steve!
> >
> > Mike
>
> So I've changed the plugs and coils, but I'm still getting misfires according to the machine from Autozone. What's the next thing that I should check?
>
> Thanks,
>
> Mike

If you have not changed the wires, now would be the time.