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- - Help with rough idle and acceleration - TIA (https://www.jeepscanada.com/jeep-mailing-list-32/help-rough-idle-acceleration-tia-31393/)

Re: Help with rough idle and acceleration - TIA

You said a failed coil would not kill 2 cylinders. It will, and that is what I
was responding to.

In message <4325FFAB.7E5E64B6@cac.net>, "tim bur" wrote:

>the reason i did not type that in was because it fires a cylinder in the exchaust
>stroke and he's trying too figure out a misfire in this case it's not needed
>info
>
>bllsht wrote:
>
>> Actually, it's 1 coil pack containing 3 coils. Each coil operating 2 cylinders.
>>
>> In message <uqidnXAodsszSLneRVn-pQ@comcast.com>, "Matt Macchiarolo" wrote:
>>
>> >That's the 4.0L, not the V-8. 4.0L I-6 uses three coil packs, one per two
>> >plugs.
>> >
>> >"tim bur" <dbrider@cac.net> wrote in message
>> >news:43249F9E.6F32B587@cac.net...
>> >> not on that coil pac
>> >>
>> >> Billy Ray wrote:
>> >>
>> >>> Don't each of the coil packs handle 2 cylinders? Wouldn't both misfire?
>> >>>
>> >>> --
>> >>> .
>> >>> Billy_Ray@SPAM.fuse.net (remove SPAM)
>> >>> 2002 Jeep WJ 4 Liter Automatic
>> >>> Brilliant Black Crystal Pearl Coat
>> >>> Sharing is why we are all here....... or should be.
>> >>> .
>> >>> "tim bur" <dbrider@cac.net> wrote in message
>> >>> news:43236F02.32C2328F@cac.net...
>> >>> > fouled spark plug, failed injector, and a failed coil pac ,
>> >>> >
>> >>> > ken859@optonline.net wrote:
>> >>> >
>> >>> >> 2004 Jeep Grand Cherokee Limited
>> >>> >> Inline 6 Cylinder Engine
>> >>> >> Automatic Transmission
>> >>> >> Stock - No modifications
>> >>> >>
>> >>> >> Symptoms:
>> >>> >> After car warms up (3-5 Minutes) the engine idle drops to about 600RPM
>> >>> >> and the car starts shaking rapidly. When you accelerate the car
>> >>> >> shakes repeatedly between 600RPM and 1500RPM. At 50 miles an hour,
>> >>> >> pressing the accelerator slightly to maintain a steady velocity (which
>> >>> >> is about 1500RPM) the car will experience the shake while driving.
>> >>> >> Moderate acceleration the problem goes away. Lifting off of the gas
>> >>> >> and the problem goes away until the above rpm range is reached and
>> >>> >> then problem comes back
>> >>> >>
>> >>> >> Followup:
>> >>> >> Computer diagnostics indicates a miss fire on cylinder # 5
>> >>> >>
>> >>> >> Question:
>> >>> >> Could this be a clogged injector or are there other suggestions?
>> >>> >>
>> >>> >> TIA Ken
>> >>> >
>> >>
>> >

Re: Help with rough idle and acceleration - TIA

not on a 4 litre

bllsht wrote:

> A failed coil will kill 2 cylinders.
>
> In message <hDqVe.248$H62.42@newssvr23.news.prodigy.net>, "Stephen Cowell"
> wrote:
>
> >
> >"bllsht" <nospam@invaliddot.net> wrote in message
> >news:qbf9i1l4ofcqsea1f6ion8ee3i0pjr77po@4ax.com.. .
> >> They sure as hell do!
> >> In message <43249F9E.6F32B587@cac.net>, "tim bur" wrote:
> >> >> Don't each of the coil packs handle 2 cylinders? Wouldn't both
> >misfire?
> >
> >Only an open circuit would misfire both
> >plugs on a lost-spark ignition... a fouled
> >plug merely helps the other plug fire.
> >__
> >Steve
> >.
> >

Re: Help with rough idle and acceleration - TIA

Not on my 1936 Harley-Davidson, either which used the same unitized
coils that fired together.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

tim bur wrote:
>
> not on a 4 litre

Re: Help with rough idle and acceleration - TIA

Would have looked similar to this Japanese:
http://www.----------.com/temp/dualCoil.jpg
>
> Not on my 1936 Harley-Davidson, either which used the same unitized
> coils that fired together.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> tim bur wrote:
> >
> > not on a 4 litre