I know the FSM and the dealer recommend copper plugs. But I've got NGK?
platimun plugs in my 00 4.7l for two reasons and neither has anything to
do with performance:
1. Cost - when the copper plugs hit 30,000KM the mileage drops
considerably. If it takes me a few weeks (or months :-( ) to get new
plugs in, I'm dropping an extra $5-$7 per tank in gas. I eat up the cost
saving pretty quickly. Given that platinum plugs are supposed to last
100,000KM, I save on time and money. Speaking of which, it's time for
new plugs. Maybe I should go back to copper for a bit and see.
2. The engine is quieter with platinum (to my untrained ear). And with
the Hurst short shift and manual, you'd do anything you could to quiet
down the unwanted noise. :-)
Rob
2000 QC 4.7l, Hurst, Hotchkis 2/4 drop
On 10-09-16 10:59 AM, MICHAEL CABE wrote:
>
> ok guys my bad on the ats . i guess what i meant is its not in the air box daa . ray ,yes i put the plugs in myself and oh yes i have tools . i have been maintaining all my vehicles for many years and currently maintain 4 family cars.i'm not afraid to tackle anything.i am in the autoparts biz and have been for 32 years at a independent wd/jobber warehouse.with all the industry info at my disposal i cant condemn the plugs but will try them any way.i need to find a service manual and read it for myself .thanks again guys
>
> --- On Wed, 9/15/10, Ray Block<BPracing@wowway.com> wrote:
>
>> From: Ray Block<BPracing@wowway.com>
>> Subject: RE: DML: Re: K&N fipk
>> To: dakota-truck@dakota-truck.net
>> Date: Wednesday, September 15, 2010, 7:02 PM
>>
>> Mike, I have a '00 Jeep 4.7 and it most certainly does have
>> an intake air
>> temp sensor in the intake manifold. It is
>> on the driver's side, just below
>> the throttle body. It has two wires going
>> to it.
>>
>> I also have a factory Service Manual and it says what Jon
>> told you... DO NOT
>> use anything but copper core spark
>> plugs. Poor performance and possible
>> engine damage may result from using platinum or other
>> exotic spark plugs.
>> Later models and H.O. versions may be exceptions.
>>
>> I get the feeling from your post that you didn't change the
>> plugs yourself
>> the last time. While not the easiest task
>> compared to old school engines
>> it's doable on your own if you have the right tools and
>> know enough to use
>> petroleum jelly on o-rings and a little dab of anti-seize
>> on the plug
>> threads....and the proper torque on all fasteners.
>>
>> Hope this helps.
>> Ray
>>
>>
>>
>>> -----Original Message-----
>>> From: owner-dakota-truck@bent.twistedbits.net
>> [mailto:owner-dakota-
>>> truck@bent.twistedbits.net]
>> On Behalf Of MICHAEL CABE
>>> Sent: Wednesday, September 15, 2010 6:07 PM
>>> To: dakota-truck@dakota-truck.net
>>> Subject: Re: DML: Re: K&N fipk
>>>
>>>
>>> jon,
>>> thanks for the good info.early 02 4.7 dak have no air
>> temp sensors as for
>>> knocking something loose I have triple checked .I also
>> thought it might be
>>> the plugs but according to champion they don't think
>> its the plugs.I will
>>> try unhooking the battery though and maybe the plugs
>> they are not that big
>>> of a deal to change .thanks again for your input.i
>> will let you know what
>>> happens
>>> Mike
>>>
>>> --- On Wed, 9/15/10, jon@dakota-truck.net
>> <jon@dakota-truck.net>
>> wrote:
>>>
>>>> From: jon@dakota-truck.net
>> <jon@dakota-truck.net>
>>>> Subject: Re: DML: Re: K&N fipk
>>>> To: dakota-truck-moderator@bent.twistedbits.net
>>>> Date: Wednesday, September 15, 2010, 1:27 AM
>>>>
>>>> MICHAEL CABE<mikecabe@prodigy.net>
>>>> wrote:
>>>>
>>>>> Mike,
>>>>> I replaced the whole stock air box with the
>> K&N
>>>> setup . It just
>>>>> seems that it is dogie and falls on its face
>> like a
>>>> lean condition .
>>>>> I see no gas mileage gain . I put new plugs
>> in at the
>>>> same time as
>>>>> they were shot . I used champion iridium
>> plugs .
>>>>
>>>>
>>>> You changed 2 variables at once, so its
>> not
>>>> possible to blame the
>>>> K&N without first eliminating it or the plugs
>> from the
>>>> equation. The
>>>> FSM says that the 4.7L is equipped with copper
>> core plugs
>>>> from the
>>>> factory and warns that preignition will result if
>> another
>>>> type of plug
>>>> is used. I'm not familiar with the Iridium
>> plugs, but
>>>> they could very
>>>> well be the cause of your problems. Frankly,
>> the
>>>> fancy spark plugs
>>>> usually cause more trouble than they are worth,
>> and that
>>>> might be the
>>>> case in your situation. Its a bit of a hassle
>> to swap
>>>> plugs, but one
>>>> thing you could try is to put the stock intake
>> system back
>>>> on, and if
>>>> the truck wakes back up, that could be an
>> indication that
>>>> the problem
>>>> is indeed the K&N. If not, it might be the
>>>> plugs. Did you gap them
>>>> to .040"?
>>>>
>>>>
>>>>> The truck has about
>>>>> 62000 on it .It idles smooth as silk and
>> cruises fine
>>>> . I think it
>>>>> sucks too much air .
>>>>
>>>>
>>>> With an EFI system, it isn't really
>> possible
>>>> to suck too much air
>>>> - the engine will only use as much air as it
>> needs,
>>>> regardless of the
>>>> flow capability of its intake tract. Unless
>> you're
>>>> using some sort of
>>>> forced induction, I would not expect the engine
>> to lean out
>>>> simply
>>>> because the intake has more flow capability.
>>>>
>>>>
>>>>> I have had the K&N setup on it for about
>> 3000
>>>>> miles I would think it would have learned by
>> now .
>>>>
>>>>
>>>> Probably, but if you did not disconnect
>> the
>>>> battery during the K&N
>>>> install, I'd recommend doing it now, just to make
>> sure the
>>>> computer is
>>>> starting out from scratch.
>>>>
>>>>
>>>>> The truck has no
>>>>> mass airflow sensor or an air temp sensor .
>>>>
>>>>
>>>> Unless you have modified the engine from
>>>> stock, the air temp
>>>> sensor is located in the intake manifold, near
>> the left
>>>> side of the
>>>> throttle body.
>>>>
>>>>
>>>>> After I installed the
>>>>> fipk i read an article some where I don't
>> remember
>>>> where that said
>>>>> without a mass airflow the computer doesn't
>> know what
>>>> to do with the
>>>>> xtra air and could create a lean condition
>> .I just
>>>> wanted to know if
>>>>> anyone had heard this or had the same
>> problem Mike
>>>> Cabe
>>>>
>>>>
>>>> No, a mass airflow sensor is not necessary
>> -
>>>> our engines use the
>>>> speed density system which uses a manifold
>> pressure sensor
>>>> and engine
>>>> RPM as inputs to a lookup table to calculate
>> fuel
>>>> requirements. The
>>>> oxygen sensor compensates from there (within
>> certain
>>>> limits) to keep
>>>> the air/fuel ratio right. A K&N intake is
>> well
>>>> within the operating
>>>> parameters of the stock programming and will not
>> lean it
>>>> out.
>>>>
>>>> Also, you mentioned that the truck feels
>>>> "dogie" and falls on its
>>>> face. I assume this is during hard
>>>> acceleration? Under those
>>>> conditions, the truck is in open loop and the
>> stock fuel
>>>> mapping is so
>>>> rich that there's no way a K&N intake could
>> lean it out
>>>> to that
>>>> degree.
>>>>
>>>> It sounds like there is something else
>> going
>>>> on here. Possibly a
>>>> sensor which wasn't plugged back in or got
>> knocked loose
>>>> during the
>>>> install. My gut is telling me to suspect those
>> spark
>>>> plugs. Since
>>>> swapping the intake out is really easy, my
>> recommendation
>>>> would be to
>>>> slap the stock intake back in there and see if
>> the truck
>>>> goes back to
>>>> normal. If not, I'd yank those plugs and
>> install a
>>>> set of the
>>>> recommended copper core plugs. (Champion
>> RC12MCC4, or
>>>> possibly the
>>>> Champion 4071 truck plugs)
>>>>
>>>>
>>>> --
>>>>
>>>>
>>>> -Jon-
>>>>
>>>> .- Jon Steiger -- jon@dakota-truck.net
>>>> or jon@jonsteiger.com
>>>> -.
>>>> | '96 Kolb Firefly, '96 Suzuki Intruder,
>>>> Miscellaneous Mopars |
>>>> `-------------------------------- http://www.jonsteiger.com --'
>>>>
>>>>
>>
>>
>>
>>
>
>
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