Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

Good to know, thanks for the follow up!

Those 'white metal' distributor cap posts are cheap crap.

The 'good' ones are the 'old style' brass ones. Those can even be
cleaned once or twice with success. The white metal ones will arc out
almost instantly if you clean the posts.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Ender wrote:
>
> On Wed, 10 Dec 2003 19:56:05 -0500, Ender
> <enderwiggin3rd@SBhotmail.com> wrote:
>
> >Hi,
> >
> >My trusty '99 Cherokee Sport 4.0 liter just went in for a 50k checkup.
> >The dealer put in a new set of plugs, a new distributor cap/rotor, and
> >a new sparkplug wire set as part of the normal maintenance. The
> >vehicle runs great, but I now have impulse ignition noise in my FM 2
> >way equipment (220 mhz) that I did not have before. The new plugs are
> >Champion RC12ECC (resistor suppressor) and the new ingition wiring is
> >Mopar (Ignition suppressor wires) so I am puzzled. I never had any
> >ignition noise issues with the OEM stuff for the first 50k miles, but
> >now, even with portable equipment 10 feet away from the vehicle, I can
> >hear fairly strong impulse noise.
> >
> >I checked all the wiring to assure that everything was seated
> >correctly and nothing looks out of place.
> >
> >Does anyone know if the stuff they put in is more poorly suppressed
> >than what was installed originally by Chrysler? Has anyone had better
> >luck with different brands of plugs or wire sets? I'm just looking
> >for a little input before I discuss the issue with my dealer.
> >
> >Thanks,
> >
> >Ender
> >
> >"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke
>
> Just in case anyone else runs into this problem, I did finally find
> the solution to the massive ignition noise problem on my 220 mhz radio
> equipment.
>
> After replacing the Champion plugs with Autolite Resistor plugs, and
> the Mopar ignition wiring with Autolite Professional Suppression wires
> and getting no improvement, I moved on to the distributor cap and
> rotor.
>
> It turned out to be the replacement distributor cap and rotor that my
> dealer installed during my tune up. It had all aluminum fittings and
> used a carbon button to transfer spark from the ignition coil to the
> rotor inside the cap. While this caused absolutely no noise on the
> AM/FM broadcast bands, it absolutely ripped up the vhf/uhf bands on my
> ham gear with spark noise. There was nothing wrong with the
> replacement cap and rotor, no cracks or loose hardware, and the engine
> ran perfectly with these "noisy" tune up parts. I replaced the cap
> and rotor installed by my 5 star dealer with "Standard" brand brass
> fitted replacements (from Acme Auto) and the problem was instantly
> resolved. The "quiet" distributor cap has the brass spring-loaded
> button that makes contact with the rotor, which is also brass. It is
> absolutely silent on the vhf/uhf bands.
>
> Hope this helps anyone who runs into this issue.
>
> Regards,
>
> Ender
>
> "The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

Good to know, thanks for the follow up!

Those 'white metal' distributor cap posts are cheap crap.

The 'good' ones are the 'old style' brass ones. Those can even be
cleaned once or twice with success. The white metal ones will arc out
almost instantly if you clean the posts.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Ender wrote:
>
> On Wed, 10 Dec 2003 19:56:05 -0500, Ender
> <enderwiggin3rd@SBhotmail.com> wrote:
>
> >Hi,
> >
> >My trusty '99 Cherokee Sport 4.0 liter just went in for a 50k checkup.
> >The dealer put in a new set of plugs, a new distributor cap/rotor, and
> >a new sparkplug wire set as part of the normal maintenance. The
> >vehicle runs great, but I now have impulse ignition noise in my FM 2
> >way equipment (220 mhz) that I did not have before. The new plugs are
> >Champion RC12ECC (resistor suppressor) and the new ingition wiring is
> >Mopar (Ignition suppressor wires) so I am puzzled. I never had any
> >ignition noise issues with the OEM stuff for the first 50k miles, but
> >now, even with portable equipment 10 feet away from the vehicle, I can
> >hear fairly strong impulse noise.
> >
> >I checked all the wiring to assure that everything was seated
> >correctly and nothing looks out of place.
> >
> >Does anyone know if the stuff they put in is more poorly suppressed
> >than what was installed originally by Chrysler? Has anyone had better
> >luck with different brands of plugs or wire sets? I'm just looking
> >for a little input before I discuss the issue with my dealer.
> >
> >Thanks,
> >
> >Ender
> >
> >"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke
>
> Just in case anyone else runs into this problem, I did finally find
> the solution to the massive ignition noise problem on my 220 mhz radio
> equipment.
>
> After replacing the Champion plugs with Autolite Resistor plugs, and
> the Mopar ignition wiring with Autolite Professional Suppression wires
> and getting no improvement, I moved on to the distributor cap and
> rotor.
>
> It turned out to be the replacement distributor cap and rotor that my
> dealer installed during my tune up. It had all aluminum fittings and
> used a carbon button to transfer spark from the ignition coil to the
> rotor inside the cap. While this caused absolutely no noise on the
> AM/FM broadcast bands, it absolutely ripped up the vhf/uhf bands on my
> ham gear with spark noise. There was nothing wrong with the
> replacement cap and rotor, no cracks or loose hardware, and the engine
> ran perfectly with these "noisy" tune up parts. I replaced the cap
> and rotor installed by my 5 star dealer with "Standard" brand brass
> fitted replacements (from Acme Auto) and the problem was instantly
> resolved. The "quiet" distributor cap has the brass spring-loaded
> button that makes contact with the rotor, which is also brass. It is
> absolutely silent on the vhf/uhf bands.
>
> Hope this helps anyone who runs into this issue.
>
> Regards,
>
> Ender
>
> "The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

Good to know, thanks for the follow up!

Those 'white metal' distributor cap posts are cheap crap.

The 'good' ones are the 'old style' brass ones. Those can even be
cleaned once or twice with success. The white metal ones will arc out
almost instantly if you clean the posts.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Ender wrote:
>
> On Wed, 10 Dec 2003 19:56:05 -0500, Ender
> <enderwiggin3rd@SBhotmail.com> wrote:
>
> >Hi,
> >
> >My trusty '99 Cherokee Sport 4.0 liter just went in for a 50k checkup.
> >The dealer put in a new set of plugs, a new distributor cap/rotor, and
> >a new sparkplug wire set as part of the normal maintenance. The
> >vehicle runs great, but I now have impulse ignition noise in my FM 2
> >way equipment (220 mhz) that I did not have before. The new plugs are
> >Champion RC12ECC (resistor suppressor) and the new ingition wiring is
> >Mopar (Ignition suppressor wires) so I am puzzled. I never had any
> >ignition noise issues with the OEM stuff for the first 50k miles, but
> >now, even with portable equipment 10 feet away from the vehicle, I can
> >hear fairly strong impulse noise.
> >
> >I checked all the wiring to assure that everything was seated
> >correctly and nothing looks out of place.
> >
> >Does anyone know if the stuff they put in is more poorly suppressed
> >than what was installed originally by Chrysler? Has anyone had better
> >luck with different brands of plugs or wire sets? I'm just looking
> >for a little input before I discuss the issue with my dealer.
> >
> >Thanks,
> >
> >Ender
> >
> >"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke
>
> Just in case anyone else runs into this problem, I did finally find
> the solution to the massive ignition noise problem on my 220 mhz radio
> equipment.
>
> After replacing the Champion plugs with Autolite Resistor plugs, and
> the Mopar ignition wiring with Autolite Professional Suppression wires
> and getting no improvement, I moved on to the distributor cap and
> rotor.
>
> It turned out to be the replacement distributor cap and rotor that my
> dealer installed during my tune up. It had all aluminum fittings and
> used a carbon button to transfer spark from the ignition coil to the
> rotor inside the cap. While this caused absolutely no noise on the
> AM/FM broadcast bands, it absolutely ripped up the vhf/uhf bands on my
> ham gear with spark noise. There was nothing wrong with the
> replacement cap and rotor, no cracks or loose hardware, and the engine
> ran perfectly with these "noisy" tune up parts. I replaced the cap
> and rotor installed by my 5 star dealer with "Standard" brand brass
> fitted replacements (from Acme Auto) and the problem was instantly
> resolved. The "quiet" distributor cap has the brass spring-loaded
> button that makes contact with the rotor, which is also brass. It is
> absolutely silent on the vhf/uhf bands.
>
> Hope this helps anyone who runs into this issue.
>
> Regards,
>
> Ender
>
> "The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

Interesting, so there's a difference between the stock distributor
cap and the OEM replacement. You might email Daimler via:
http://www.jeep.com/universal/J/inde...r=wccs&prefix=
And help your fellow ham operators.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Ender wrote:
>
> Just in case anyone else runs into this problem, I did finally find
> the solution to the massive ignition noise problem on my 220 mhz radio
> equipment.
>
> After replacing the Champion plugs with Autolite Resistor plugs, and
> the Mopar ignition wiring with Autolite Professional Suppression wires
> and getting no improvement, I moved on to the distributor cap and
> rotor.
>
> It turned out to be the replacement distributor cap and rotor that my
> dealer installed during my tune up. It had all aluminum fittings and
> used a carbon button to transfer spark from the ignition coil to the
> rotor inside the cap. While this caused absolutely no noise on the
> AM/FM broadcast bands, it absolutely ripped up the vhf/uhf bands on my
> ham gear with spark noise. There was nothing wrong with the
> replacement cap and rotor, no cracks or loose hardware, and the engine
> ran perfectly with these "noisy" tune up parts. I replaced the cap
> and rotor installed by my 5 star dealer with "Standard" brand brass
> fitted replacements (from Acme Auto) and the problem was instantly
> resolved. The "quiet" distributor cap has the brass spring-loaded
> button that makes contact with the rotor, which is also brass. It is
> absolutely silent on the vhf/uhf bands.
>
> Hope this helps anyone who runs into this issue.
>
> Regards,
>
> Ender
>
> "The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

Interesting, so there's a difference between the stock distributor
cap and the OEM replacement. You might email Daimler via:
http://www.jeep.com/universal/J/inde...r=wccs&prefix=
And help your fellow ham operators.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Ender wrote:
>
> Just in case anyone else runs into this problem, I did finally find
> the solution to the massive ignition noise problem on my 220 mhz radio
> equipment.
>
> After replacing the Champion plugs with Autolite Resistor plugs, and
> the Mopar ignition wiring with Autolite Professional Suppression wires
> and getting no improvement, I moved on to the distributor cap and
> rotor.
>
> It turned out to be the replacement distributor cap and rotor that my
> dealer installed during my tune up. It had all aluminum fittings and
> used a carbon button to transfer spark from the ignition coil to the
> rotor inside the cap. While this caused absolutely no noise on the
> AM/FM broadcast bands, it absolutely ripped up the vhf/uhf bands on my
> ham gear with spark noise. There was nothing wrong with the
> replacement cap and rotor, no cracks or loose hardware, and the engine
> ran perfectly with these "noisy" tune up parts. I replaced the cap
> and rotor installed by my 5 star dealer with "Standard" brand brass
> fitted replacements (from Acme Auto) and the problem was instantly
> resolved. The "quiet" distributor cap has the brass spring-loaded
> button that makes contact with the rotor, which is also brass. It is
> absolutely silent on the vhf/uhf bands.
>
> Hope this helps anyone who runs into this issue.
>
> Regards,
>
> Ender
>
> "The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

Interesting, so there's a difference between the stock distributor
cap and the OEM replacement. You might email Daimler via:
http://www.jeep.com/universal/J/inde...r=wccs&prefix=
And help your fellow ham operators.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Ender wrote:
>
> Just in case anyone else runs into this problem, I did finally find
> the solution to the massive ignition noise problem on my 220 mhz radio
> equipment.
>
> After replacing the Champion plugs with Autolite Resistor plugs, and
> the Mopar ignition wiring with Autolite Professional Suppression wires
> and getting no improvement, I moved on to the distributor cap and
> rotor.
>
> It turned out to be the replacement distributor cap and rotor that my
> dealer installed during my tune up. It had all aluminum fittings and
> used a carbon button to transfer spark from the ignition coil to the
> rotor inside the cap. While this caused absolutely no noise on the
> AM/FM broadcast bands, it absolutely ripped up the vhf/uhf bands on my
> ham gear with spark noise. There was nothing wrong with the
> replacement cap and rotor, no cracks or loose hardware, and the engine
> ran perfectly with these "noisy" tune up parts. I replaced the cap
> and rotor installed by my 5 star dealer with "Standard" brand brass
> fitted replacements (from Acme Auto) and the problem was instantly
> resolved. The "quiet" distributor cap has the brass spring-loaded
> button that makes contact with the rotor, which is also brass. It is
> absolutely silent on the vhf/uhf bands.
>
> Hope this helps anyone who runs into this issue.
>
> Regards,
>
> Ender
>
> "The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

On Tue, 23 Dec 2003 14:41:05 -0800, L.W.(ßill) ------ III
<----------@cox.net> wrote:

> Interesting, so there's a difference between the stock distributor
>cap and the OEM replacement. You might email Daimler via:
>http://www.jeep.com/universal/J/inde...r=wccs&prefix=
>And help your fellow ham operators.
> God Bless America, ßill O|||||||O

Thank you for the suggestion. I passed along the information in their
online form.

Regards,

Ender

"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

On Tue, 23 Dec 2003 14:41:05 -0800, L.W.(ßill) ------ III
<----------@cox.net> wrote:

> Interesting, so there's a difference between the stock distributor
>cap and the OEM replacement. You might email Daimler via:
>http://www.jeep.com/universal/J/inde...r=wccs&prefix=
>And help your fellow ham operators.
> God Bless America, ßill O|||||||O

Thank you for the suggestion. I passed along the information in their
online form.

Regards,

Ender

"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

On Tue, 23 Dec 2003 14:41:05 -0800, L.W.(ßill) ------ III
<----------@cox.net> wrote:

> Interesting, so there's a difference between the stock distributor
>cap and the OEM replacement. You might email Daimler via:
>http://www.jeep.com/universal/J/inde...r=wccs&prefix=
>And help your fellow ham operators.
> God Bless America, ßill O|||||||O

Thank you for the suggestion. I passed along the information in their
online form.

Regards,

Ender

"The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: 99 Cherokee Sport 4.0 Liter Ignition Suppression Question
 

Maybe someone sued them for copyright infringement on brass distributor cap
terminals. ;-)

Chris


"L.W. (ßill) ------ III" <----------@cox.net> wrote in message
news:3FE8C481.459BD8@cox.net...
> Interesting, so there's a difference between the stock distributor
> cap and the OEM replacement. You might email Daimler via:
>
http://www.jeep.com/universal/J/inde...r=wccs&prefix=
> And help your fellow ham operators.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Ender wrote:
> >
> > Just in case anyone else runs into this problem, I did finally find
> > the solution to the massive ignition noise problem on my 220 mhz radio
> > equipment.
> >
> > After replacing the Champion plugs with Autolite Resistor plugs, and
> > the Mopar ignition wiring with Autolite Professional Suppression wires
> > and getting no improvement, I moved on to the distributor cap and
> > rotor.
> >
> > It turned out to be the replacement distributor cap and rotor that my
> > dealer installed during my tune up. It had all aluminum fittings and
> > used a carbon button to transfer spark from the ignition coil to the
> > rotor inside the cap. While this caused absolutely no noise on the
> > AM/FM broadcast bands, it absolutely ripped up the vhf/uhf bands on my
> > ham gear with spark noise. There was nothing wrong with the
> > replacement cap and rotor, no cracks or loose hardware, and the engine
> > ran perfectly with these "noisy" tune up parts. I replaced the cap
> > and rotor installed by my 5 star dealer with "Standard" brand brass
> > fitted replacements (from Acme Auto) and the problem was instantly
> > resolved. The "quiet" distributor cap has the brass spring-loaded
> > button that makes contact with the rotor, which is also brass. It is
> > absolutely silent on the vhf/uhf bands.
> >
> > Hope this helps anyone who runs into this issue.
> >
> > Regards,
> >
> > Ender
> >
> > "The only thing necessary for the triumph of evil is for good men to do
nothing." Edmund Burke