Bosch IR Fusion spark plugs
#1
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Year: 1994
Model: Cherokee
Engine: 4.0 HO I-6
Hey everybody,
I just wanted to know if anyone ran these in their 4.0. I have a good buddy whose been a mechanic for 30 yrs and told me I should try them.
Right now, I run champion RC12LYC's and havent had any trouble. Just wonderin if anyone has had luck with these.
I just wanted to know if anyone ran these in their 4.0. I have a good buddy whose been a mechanic for 30 yrs and told me I should try them.
Right now, I run champion RC12LYC's and havent had any trouble. Just wonderin if anyone has had luck with these.
#3
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Year: 1994
Model: Cherokee
Engine: 4.0 HO I-6
Have you had any benefits over the champions to the ngk? I can get the boschs at a discount.
If they are both iradiums then I think i might try the bosch.
If they are both iradiums then I think i might try the bosch.
#5
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
#7
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#10
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Year: 1997
Engine: 4.0
I'm a fan of ngk plugs. I used the same champions you have and roughly 12k miles into their service life they were toast. with the being said, the only brand that has ever given me a bad plug out of the box is ngk. I spent hours tracking a misfire on one of my ls1 cars and passed off the plug bc hey it's a ngk. dumb
have you given any thought to which motor oil is best for your jeep ?
have you given any thought to which motor oil is best for your jeep ?
#12
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Year: 1993
Model: Cherokee
Engine: 4.0L
I can't speak for iridium plugs but those who make blanket statements about platinum plugs not doing well in our 4.0s simply don't know what they are talking about. This is never ending.
I have a pure stock '93 with no special ignition components and have run Bosch platinum plugs for 7 of the 9 years I've owned it. If the platinums require higher voltage to fire efficiently, the stock system obviously supplies it. I tried the coppers for 2 years and can tell you that all they did was wear out with a massive gap and decreasing MPG. Did prove one thing: setting the gap to precisely .035 is not that big of a deal for our 4.0s.
The sheer hatred that some have for the platinum plugs is obviously some sort of social thing. I'm not sure who it was but one senior forum member stated at one point that he didn't want plugs that lasted 100,000 miles. Huh?!?! Yet another good reason not to run the platinum plugs!
I have a pure stock '93 with no special ignition components and have run Bosch platinum plugs for 7 of the 9 years I've owned it. If the platinums require higher voltage to fire efficiently, the stock system obviously supplies it. I tried the coppers for 2 years and can tell you that all they did was wear out with a massive gap and decreasing MPG. Did prove one thing: setting the gap to precisely .035 is not that big of a deal for our 4.0s.
The sheer hatred that some have for the platinum plugs is obviously some sort of social thing. I'm not sure who it was but one senior forum member stated at one point that he didn't want plugs that lasted 100,000 miles. Huh?!?! Yet another good reason not to run the platinum plugs!
#14
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I can't speak for iridium plugs but those who make blanket statements about platinum plugs not doing well in our 4.0s simply don't know what they are talking about. This is never ending.
I have a pure stock '93 with no special ignition components and have run Bosch platinum plugs for 7 of the 9 years I've owned it. If the platinums require higher voltage to fire efficiently, the stock system obviously supplies it. I tried the coppers for 2 years and can tell you that all they did was wear out with a massive gap and decreasing MPG. Did prove one thing: setting the gap to precisely .035 is not that big of a deal for our 4.0s.
The sheer hatred that some have for the platinum plugs is obviously some sort of social thing. I'm not sure who it was but one senior forum member stated at one point that he didn't want plugs that lasted 100,000 miles. Huh?!?! Yet another good reason not to run the platinum plugs!
I have a pure stock '93 with no special ignition components and have run Bosch platinum plugs for 7 of the 9 years I've owned it. If the platinums require higher voltage to fire efficiently, the stock system obviously supplies it. I tried the coppers for 2 years and can tell you that all they did was wear out with a massive gap and decreasing MPG. Did prove one thing: setting the gap to precisely .035 is not that big of a deal for our 4.0s.
The sheer hatred that some have for the platinum plugs is obviously some sort of social thing. I'm not sure who it was but one senior forum member stated at one point that he didn't want plugs that lasted 100,000 miles. Huh?!?! Yet another good reason not to run the platinum plugs!
A)Trip to California from Arizona in a Honda CRX. O2 sensor fault with a slight miss.
Replaced O2 sensor. Still getting a CEL. Change out brand new Bosch Platimums and problem solved.
B) Datsun 260Z on a chassis dyno at a local college. Ran Bosch Platinum Plus 4s back to back with Champions. Gained 28 RWHP with Champions over the Platinums.
C) 1979 Alfa Romeo Spider with mechanical fuel injection. Special tuning required. I am one of the only folks in Northern Arizona who can do this.
Fought poor performance and idle with a perfect fuel management system tune. Ditched Bosch Platinums for standard NGKs and the car ran perfect, with no adjustments needed.
That's why I hate those gimmicky Bosch plugs. For crying out loud, some German car manufacturers even specify NGK.
Is this a hate crime? Am I a spark plug racist? Not hardly.
#15
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Year: 1999
Model: Cherokee
Engine: 4.0
I should save this.
A)Trip to California from Arizona in a Honda CRX. O2 sensor fault with a slight miss.
Replaced O2 sensor. Still getting a CEL. Change out brand new Bosch Platimums and problem solved.
B) Datsun 260Z on a chassis dyno at a local college. Ran Bosch Platinum Plus 4s back to back with Champions. Gained 28 RWHP with Champions over the Platinums.
C) 1979 Alfa Romeo Spider with mechanical fuel injection. Special tuning required. I am one of the only folks in Northern Arizona who can do this.
Fought poor performance and idle with a perfect fuel management system tune. Ditched Bosch Platinums for standard NGKs and the car ran perfect, with no adjustments needed.
That's why I hate those gimmicky Bosch plugs. For crying out loud, some German car manufacturers even specify NGK.
Is this a hate crime? Am I a spark plug racist? Not hardly.
A)Trip to California from Arizona in a Honda CRX. O2 sensor fault with a slight miss.
Replaced O2 sensor. Still getting a CEL. Change out brand new Bosch Platimums and problem solved.
B) Datsun 260Z on a chassis dyno at a local college. Ran Bosch Platinum Plus 4s back to back with Champions. Gained 28 RWHP with Champions over the Platinums.
C) 1979 Alfa Romeo Spider with mechanical fuel injection. Special tuning required. I am one of the only folks in Northern Arizona who can do this.
Fought poor performance and idle with a perfect fuel management system tune. Ditched Bosch Platinums for standard NGKs and the car ran perfect, with no adjustments needed.
That's why I hate those gimmicky Bosch plugs. For crying out loud, some German car manufacturers even specify NGK.
Is this a hate crime? Am I a spark plug racist? Not hardly.
Data.