Autolite spark plugs in 4.0 L Jeep
 

I have had numerous people tell me to dump the stock Champion
(RC12ECC) spark plugs and replace them with Autollite 985 plugs. It
is my understanding that the Autolites use a 5k resistor for ignition
supression while the Champion uses some type of solid state device
instead. Any issues with swapping the Champions out with the
Autolites? (One of the "new" Champion plugs the dealer put in during
a recent tuneup has an obvious crack in the insulator body, which
seems to be the source of the recent ignition noise in my radio gear.)

Thanks for any input.

Ender

99 Cherokee 4.0L
Distributor type ignition

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

Re: Autolite spark plugs in 4.0 L Jeep
 

Ender did pass the time by typing:
> I have had numerous people tell me to dump the stock Champion
> (RC12ECC) spark plugs and replace them with Autollite 985 plugs. It
> is my understanding that the Autolites use a 5k resistor for ignition
> supression while the Champion uses some type of solid state device
> instead. Any issues with swapping the Champions out with the
> Autolites? (One of the "new" Champion plugs the dealer put in during
> a recent tuneup has an obvious crack in the insulator body, which
> seems to be the source of the recent ignition noise in my radio gear.)

Any solid-state device in a sparkplug would frag instantly. Spark
plugs are either straight through or resistor and have varrying heat
ranges.

A cracked plug should be replaced immediatly. Misfires and bad timing
play hell on an engine.

As for Champion vs. Autolite, dunno.. I use Champion RC9YC4 (a cooler
plug than you would use for a stock 4.0) Never had a problem with them.

You should learn to do your own plugs and wires, it's not hard and
one hell of a lot cheaper than dealership prices.

--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors

Re: Autolite spark plugs in 4.0 L Jeep
 

Ender did pass the time by typing:
> I have had numerous people tell me to dump the stock Champion
> (RC12ECC) spark plugs and replace them with Autollite 985 plugs. It
> is my understanding that the Autolites use a 5k resistor for ignition
> supression while the Champion uses some type of solid state device
> instead. Any issues with swapping the Champions out with the
> Autolites? (One of the "new" Champion plugs the dealer put in during
> a recent tuneup has an obvious crack in the insulator body, which
> seems to be the source of the recent ignition noise in my radio gear.)

Any solid-state device in a sparkplug would frag instantly. Spark
plugs are either straight through or resistor and have varrying heat
ranges.

A cracked plug should be replaced immediatly. Misfires and bad timing
play hell on an engine.

As for Champion vs. Autolite, dunno.. I use Champion RC9YC4 (a cooler
plug than you would use for a stock 4.0) Never had a problem with them.

You should learn to do your own plugs and wires, it's not hard and
one hell of a lot cheaper than dealership prices.

--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors

Re: Autolite spark plugs in 4.0 L Jeep
 

Ender did pass the time by typing:
> I have had numerous people tell me to dump the stock Champion
> (RC12ECC) spark plugs and replace them with Autollite 985 plugs. It
> is my understanding that the Autolites use a 5k resistor for ignition
> supression while the Champion uses some type of solid state device
> instead. Any issues with swapping the Champions out with the
> Autolites? (One of the "new" Champion plugs the dealer put in during
> a recent tuneup has an obvious crack in the insulator body, which
> seems to be the source of the recent ignition noise in my radio gear.)

Any solid-state device in a sparkplug would frag instantly. Spark
plugs are either straight through or resistor and have varrying heat
ranges.

A cracked plug should be replaced immediatly. Misfires and bad timing
play hell on an engine.

As for Champion vs. Autolite, dunno.. I use Champion RC9YC4 (a cooler
plug than you would use for a stock 4.0) Never had a problem with them.

You should learn to do your own plugs and wires, it's not hard and
one hell of a lot cheaper than dealership prices.

--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors

Re: Autolite spark plugs in 4.0 L Jeep
 

stay with the champs or better yet get the new ngk plugs but stay away from autolites they foul a
lot easier than champs

Ender wrote:

> I have had numerous people tell me to dump the stock Champion
> (RC12ECC) spark plugs and replace them with Autollite 985 plugs. It
> is my understanding that the Autolites use a 5k resistor for ignition
> supression while the Champion uses some type of solid state device
> instead. Any issues with swapping the Champions out with the
> Autolites? (One of the "new" Champion plugs the dealer put in during
> a recent tuneup has an obvious crack in the insulator body, which
> seems to be the source of the recent ignition noise in my radio gear.)
>
> Thanks for any input.
>
> Ender
>
> 99 Cherokee 4.0L
> Distributor type ignition
>
> "The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: Autolite spark plugs in 4.0 L Jeep
 

stay with the champs or better yet get the new ngk plugs but stay away from autolites they foul a
lot easier than champs

Ender wrote:

> I have had numerous people tell me to dump the stock Champion
> (RC12ECC) spark plugs and replace them with Autollite 985 plugs. It
> is my understanding that the Autolites use a 5k resistor for ignition
> supression while the Champion uses some type of solid state device
> instead. Any issues with swapping the Champions out with the
> Autolites? (One of the "new" Champion plugs the dealer put in during
> a recent tuneup has an obvious crack in the insulator body, which
> seems to be the source of the recent ignition noise in my radio gear.)
>
> Thanks for any input.
>
> Ender
>
> 99 Cherokee 4.0L
> Distributor type ignition
>
> "The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: Autolite spark plugs in 4.0 L Jeep
 

stay with the champs or better yet get the new ngk plugs but stay away from autolites they foul a
lot easier than champs

Ender wrote:

> I have had numerous people tell me to dump the stock Champion
> (RC12ECC) spark plugs and replace them with Autollite 985 plugs. It
> is my understanding that the Autolites use a 5k resistor for ignition
> supression while the Champion uses some type of solid state device
> instead. Any issues with swapping the Champions out with the
> Autolites? (One of the "new" Champion plugs the dealer put in during
> a recent tuneup has an obvious crack in the insulator body, which
> seems to be the source of the recent ignition noise in my radio gear.)
>
> Thanks for any input.
>
> Ender
>
> 99 Cherokee 4.0L
> Distributor type ignition
>
> "The only thing necessary for the triumph of evil is for good men to do nothing." Edmund Burke

Re: Autolite spark plugs in 4.0 L Jeep
 

>Any solid-state device in a sparkplug would frag instantly. Spark
>plugs are either straight through or resistor and have varrying heat
>ranges.
>
>A cracked plug should be replaced immediatly. Misfires and bad timing
>play hell on an engine.
>
>As for Champion vs. Autolite, dunno.. I use Champion RC9YC4 (a cooler
>plug than you would use for a stock 4.0) Never had a problem with them.
>
>You should learn to do your own plugs and wires, it's not hard and
>one hell of a lot cheaper than dealership prices.

Heh, yah it is. I always used to with my '62 CJ5 and my '69 CJ5 with
the buick V6, but I have gotten lazy. Regarding the Champion solid
state supressor, check this out. I was kind of skeptical too, but...

"Champion has patented a semi-conductor resistor, called SAC9, which
suppresses RFI below SAE J551 standards and will not fail under any
circumstances in an automotive engine. It is made up of strontium,
aluminum oxide and copper oxide. This semi-coflductor will not be
affected by either internal arcing or the wide range of temperatures
found under the hood. It increases both the life of the spark plug and
its ability to suppress RFI. "

http://dodgeram.info/Engine-Gas/Spar...ml#Today's

Anyway, I did install the Autolites and the engine runs great. No
ignition noise in the VHF/UHF range anymore, and the engine runs like
new. Seems like their solid state supressor works ok on the AM/FM
broadcast band but doesn't do much supression above 200 mhz. (Based
upon my own experience here.)

Thanks for the response.

Ender



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

Re: Autolite spark plugs in 4.0 L Jeep
 

>Any solid-state device in a sparkplug would frag instantly. Spark
>plugs are either straight through or resistor and have varrying heat
>ranges.
>
>A cracked plug should be replaced immediatly. Misfires and bad timing
>play hell on an engine.
>
>As for Champion vs. Autolite, dunno.. I use Champion RC9YC4 (a cooler
>plug than you would use for a stock 4.0) Never had a problem with them.
>
>You should learn to do your own plugs and wires, it's not hard and
>one hell of a lot cheaper than dealership prices.

Heh, yah it is. I always used to with my '62 CJ5 and my '69 CJ5 with
the buick V6, but I have gotten lazy. Regarding the Champion solid
state supressor, check this out. I was kind of skeptical too, but...

"Champion has patented a semi-conductor resistor, called SAC9, which
suppresses RFI below SAE J551 standards and will not fail under any
circumstances in an automotive engine. It is made up of strontium,
aluminum oxide and copper oxide. This semi-coflductor will not be
affected by either internal arcing or the wide range of temperatures
found under the hood. It increases both the life of the spark plug and
its ability to suppress RFI. "

http://dodgeram.info/Engine-Gas/Spar...ml#Today's

Anyway, I did install the Autolites and the engine runs great. No
ignition noise in the VHF/UHF range anymore, and the engine runs like
new. Seems like their solid state supressor works ok on the AM/FM
broadcast band but doesn't do much supression above 200 mhz. (Based
upon my own experience here.)

Thanks for the response.

Ender



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

Re: Autolite spark plugs in 4.0 L Jeep
 

>Any solid-state device in a sparkplug would frag instantly. Spark
>plugs are either straight through or resistor and have varrying heat
>ranges.
>
>A cracked plug should be replaced immediatly. Misfires and bad timing
>play hell on an engine.
>
>As for Champion vs. Autolite, dunno.. I use Champion RC9YC4 (a cooler
>plug than you would use for a stock 4.0) Never had a problem with them.
>
>You should learn to do your own plugs and wires, it's not hard and
>one hell of a lot cheaper than dealership prices.

Heh, yah it is. I always used to with my '62 CJ5 and my '69 CJ5 with
the buick V6, but I have gotten lazy. Regarding the Champion solid
state supressor, check this out. I was kind of skeptical too, but...

"Champion has patented a semi-conductor resistor, called SAC9, which
suppresses RFI below SAE J551 standards and will not fail under any
circumstances in an automotive engine. It is made up of strontium,
aluminum oxide and copper oxide. This semi-coflductor will not be
affected by either internal arcing or the wide range of temperatures
found under the hood. It increases both the life of the spark plug and
its ability to suppress RFI. "

http://dodgeram.info/Engine-Gas/Spar...ml#Today's

Anyway, I did install the Autolites and the engine runs great. No
ignition noise in the VHF/UHF range anymore, and the engine runs like
new. Seems like their solid state supressor works ok on the AM/FM
broadcast band but doesn't do much supression above 200 mhz. (Based
upon my own experience here.)

Thanks for the response.

Ender



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