Code P0301
03-09-2006, 02:53 AM
#51
Guest
Posts: n/a
Re: Code P0301
In article <6bba0$440f9d7a$4831b233$8295@FUSE.NET>,
billy ray <billy_ray@fuseSPAM.net> wrote:
#If that fails you can try spraying a MIST of water around the coil rail.
#sparkplug boot area while watching and listening for a spark leak. This is
#best done away from shaded or dark area.
Why away from shade or dark areas?
/herb
billy ray <billy_ray@fuseSPAM.net> wrote:
#If that fails you can try spraying a MIST of water around the coil rail.
#sparkplug boot area while watching and listening for a spark leak. This is
#best done away from shaded or dark area.
Why away from shade or dark areas?
/herb
03-09-2006, 02:53 AM
#52
Guest
Posts: n/a
Re: Code P0301
In article <6bba0$440f9d7a$4831b233$8295@FUSE.NET>,
billy ray <billy_ray@fuseSPAM.net> wrote:
#If that fails you can try spraying a MIST of water around the coil rail.
#sparkplug boot area while watching and listening for a spark leak. This is
#best done away from shaded or dark area.
Why away from shade or dark areas?
/herb
billy ray <billy_ray@fuseSPAM.net> wrote:
#If that fails you can try spraying a MIST of water around the coil rail.
#sparkplug boot area while watching and listening for a spark leak. This is
#best done away from shaded or dark area.
Why away from shade or dark areas?
/herb
03-09-2006, 02:53 AM
#53
Guest
Posts: n/a
Re: Code P0301
In article <6bba0$440f9d7a$4831b233$8295@FUSE.NET>,
billy ray <billy_ray@fuseSPAM.net> wrote:
#If that fails you can try spraying a MIST of water around the coil rail.
#sparkplug boot area while watching and listening for a spark leak. This is
#best done away from shaded or dark area.
Why away from shade or dark areas?
/herb
billy ray <billy_ray@fuseSPAM.net> wrote:
#If that fails you can try spraying a MIST of water around the coil rail.
#sparkplug boot area while watching and listening for a spark leak. This is
#best done away from shaded or dark area.
Why away from shade or dark areas?
/herb
03-09-2006, 02:54 AM
#54
Guest
Posts: n/a
Re: Code P0301
The 4 liter I-6 firing order is 1,5,3,6,2,4
Cylinders 1 & 6, 5 & 2, and 3 & 4 always fire together.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnaIf9tZ6QJLZRVn-vQ@speakeasy.net...
> In article <TQLPf.12279$nB6.925@news-wrt-01.rdc-nyc.rr.com>,
> Firebird <erodman@nyc.rr.com> wrote:
>
> #"Herb Leong" <herb@urusei.net> wrote in message
> #news:3qGdnfPjKL8uIJPZnZ2dnUVZ_vmdnZ2d@speakeasy.n et...
>
> #> In article <kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com>,
> #> Firebird <erodman@nyc.rr.com> wrote:
> #> #I got the light on the dashboard while waiting in line to exit a large
> #> #parking lot. THe engine had been idling for about 5-7 minutes. Code
> #> P0301
> #> #is a miss in cylinder 1, however I never felt anything and the engine
> #> runs
> #> #ok to me.
> #> #The light has been on the dashboard for about 3 weeks now.
> #> #How should I proceed. I thought it resets itself after 40 starts.
> #>
> #> The code will reset after 40 starts with no problems. The light
> #> resets sooner than that. If you light is still on, it's time to
> #> check your plug and anything attached to it...
> #>
> #> What engine do you have?
> #>
> #> /herb
>
> #I have the 6 cylinder. I think its a 4.0 ...it runs fine. It does not
> feel
> #like its missing.
>
> It is possible you don't feel anything because it is a in-line 6. A
> missing spark would probably go unnoticed, at least for a little while
> until you get problems from fuel in the exhaust. Before I had my YJ's
> original 4.2 I6 replaced, I pretty much had ziltch compression on my
> number 6 cylinder and I hardly noticed it unless doing 70+ on a steep
> (for a freeway) incline--then it felt like I was driving my mom's '81
> Honda-civic-putt-putt.
>
> On the 4.0, the sparkplugs fire twice per cycle as 3 ignition coils are
> shared by the 6 cylinders so you may want to also look at the other
> sparkplug that's tied to the number 1 cylinder's sparkplug.
>
> If you ever look at the engines that are used to demo the snake-oil
> additives on late night infomercials with sand and other crud dumped
> on top of the heads, it's always a I6.
>
> You should still check your plug and anything attached to it.
>
> /herb
Cylinders 1 & 6, 5 & 2, and 3 & 4 always fire together.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnaIf9tZ6QJLZRVn-vQ@speakeasy.net...
> In article <TQLPf.12279$nB6.925@news-wrt-01.rdc-nyc.rr.com>,
> Firebird <erodman@nyc.rr.com> wrote:
>
> #"Herb Leong" <herb@urusei.net> wrote in message
> #news:3qGdnfPjKL8uIJPZnZ2dnUVZ_vmdnZ2d@speakeasy.n et...
>
> #> In article <kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com>,
> #> Firebird <erodman@nyc.rr.com> wrote:
> #> #I got the light on the dashboard while waiting in line to exit a large
> #> #parking lot. THe engine had been idling for about 5-7 minutes. Code
> #> P0301
> #> #is a miss in cylinder 1, however I never felt anything and the engine
> #> runs
> #> #ok to me.
> #> #The light has been on the dashboard for about 3 weeks now.
> #> #How should I proceed. I thought it resets itself after 40 starts.
> #>
> #> The code will reset after 40 starts with no problems. The light
> #> resets sooner than that. If you light is still on, it's time to
> #> check your plug and anything attached to it...
> #>
> #> What engine do you have?
> #>
> #> /herb
>
> #I have the 6 cylinder. I think its a 4.0 ...it runs fine. It does not
> feel
> #like its missing.
>
> It is possible you don't feel anything because it is a in-line 6. A
> missing spark would probably go unnoticed, at least for a little while
> until you get problems from fuel in the exhaust. Before I had my YJ's
> original 4.2 I6 replaced, I pretty much had ziltch compression on my
> number 6 cylinder and I hardly noticed it unless doing 70+ on a steep
> (for a freeway) incline--then it felt like I was driving my mom's '81
> Honda-civic-putt-putt.
>
> On the 4.0, the sparkplugs fire twice per cycle as 3 ignition coils are
> shared by the 6 cylinders so you may want to also look at the other
> sparkplug that's tied to the number 1 cylinder's sparkplug.
>
> If you ever look at the engines that are used to demo the snake-oil
> additives on late night infomercials with sand and other crud dumped
> on top of the heads, it's always a I6.
>
> You should still check your plug and anything attached to it.
>
> /herb
03-09-2006, 02:54 AM
#55
Guest
Posts: n/a
Re: Code P0301
The 4 liter I-6 firing order is 1,5,3,6,2,4
Cylinders 1 & 6, 5 & 2, and 3 & 4 always fire together.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnaIf9tZ6QJLZRVn-vQ@speakeasy.net...
> In article <TQLPf.12279$nB6.925@news-wrt-01.rdc-nyc.rr.com>,
> Firebird <erodman@nyc.rr.com> wrote:
>
> #"Herb Leong" <herb@urusei.net> wrote in message
> #news:3qGdnfPjKL8uIJPZnZ2dnUVZ_vmdnZ2d@speakeasy.n et...
>
> #> In article <kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com>,
> #> Firebird <erodman@nyc.rr.com> wrote:
> #> #I got the light on the dashboard while waiting in line to exit a large
> #> #parking lot. THe engine had been idling for about 5-7 minutes. Code
> #> P0301
> #> #is a miss in cylinder 1, however I never felt anything and the engine
> #> runs
> #> #ok to me.
> #> #The light has been on the dashboard for about 3 weeks now.
> #> #How should I proceed. I thought it resets itself after 40 starts.
> #>
> #> The code will reset after 40 starts with no problems. The light
> #> resets sooner than that. If you light is still on, it's time to
> #> check your plug and anything attached to it...
> #>
> #> What engine do you have?
> #>
> #> /herb
>
> #I have the 6 cylinder. I think its a 4.0 ...it runs fine. It does not
> feel
> #like its missing.
>
> It is possible you don't feel anything because it is a in-line 6. A
> missing spark would probably go unnoticed, at least for a little while
> until you get problems from fuel in the exhaust. Before I had my YJ's
> original 4.2 I6 replaced, I pretty much had ziltch compression on my
> number 6 cylinder and I hardly noticed it unless doing 70+ on a steep
> (for a freeway) incline--then it felt like I was driving my mom's '81
> Honda-civic-putt-putt.
>
> On the 4.0, the sparkplugs fire twice per cycle as 3 ignition coils are
> shared by the 6 cylinders so you may want to also look at the other
> sparkplug that's tied to the number 1 cylinder's sparkplug.
>
> If you ever look at the engines that are used to demo the snake-oil
> additives on late night infomercials with sand and other crud dumped
> on top of the heads, it's always a I6.
>
> You should still check your plug and anything attached to it.
>
> /herb
Cylinders 1 & 6, 5 & 2, and 3 & 4 always fire together.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnaIf9tZ6QJLZRVn-vQ@speakeasy.net...
> In article <TQLPf.12279$nB6.925@news-wrt-01.rdc-nyc.rr.com>,
> Firebird <erodman@nyc.rr.com> wrote:
>
> #"Herb Leong" <herb@urusei.net> wrote in message
> #news:3qGdnfPjKL8uIJPZnZ2dnUVZ_vmdnZ2d@speakeasy.n et...
>
> #> In article <kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com>,
> #> Firebird <erodman@nyc.rr.com> wrote:
> #> #I got the light on the dashboard while waiting in line to exit a large
> #> #parking lot. THe engine had been idling for about 5-7 minutes. Code
> #> P0301
> #> #is a miss in cylinder 1, however I never felt anything and the engine
> #> runs
> #> #ok to me.
> #> #The light has been on the dashboard for about 3 weeks now.
> #> #How should I proceed. I thought it resets itself after 40 starts.
> #>
> #> The code will reset after 40 starts with no problems. The light
> #> resets sooner than that. If you light is still on, it's time to
> #> check your plug and anything attached to it...
> #>
> #> What engine do you have?
> #>
> #> /herb
>
> #I have the 6 cylinder. I think its a 4.0 ...it runs fine. It does not
> feel
> #like its missing.
>
> It is possible you don't feel anything because it is a in-line 6. A
> missing spark would probably go unnoticed, at least for a little while
> until you get problems from fuel in the exhaust. Before I had my YJ's
> original 4.2 I6 replaced, I pretty much had ziltch compression on my
> number 6 cylinder and I hardly noticed it unless doing 70+ on a steep
> (for a freeway) incline--then it felt like I was driving my mom's '81
> Honda-civic-putt-putt.
>
> On the 4.0, the sparkplugs fire twice per cycle as 3 ignition coils are
> shared by the 6 cylinders so you may want to also look at the other
> sparkplug that's tied to the number 1 cylinder's sparkplug.
>
> If you ever look at the engines that are used to demo the snake-oil
> additives on late night infomercials with sand and other crud dumped
> on top of the heads, it's always a I6.
>
> You should still check your plug and anything attached to it.
>
> /herb
03-09-2006, 02:54 AM
#56
Guest
Posts: n/a
Re: Code P0301
The 4 liter I-6 firing order is 1,5,3,6,2,4
Cylinders 1 & 6, 5 & 2, and 3 & 4 always fire together.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnaIf9tZ6QJLZRVn-vQ@speakeasy.net...
> In article <TQLPf.12279$nB6.925@news-wrt-01.rdc-nyc.rr.com>,
> Firebird <erodman@nyc.rr.com> wrote:
>
> #"Herb Leong" <herb@urusei.net> wrote in message
> #news:3qGdnfPjKL8uIJPZnZ2dnUVZ_vmdnZ2d@speakeasy.n et...
>
> #> In article <kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com>,
> #> Firebird <erodman@nyc.rr.com> wrote:
> #> #I got the light on the dashboard while waiting in line to exit a large
> #> #parking lot. THe engine had been idling for about 5-7 minutes. Code
> #> P0301
> #> #is a miss in cylinder 1, however I never felt anything and the engine
> #> runs
> #> #ok to me.
> #> #The light has been on the dashboard for about 3 weeks now.
> #> #How should I proceed. I thought it resets itself after 40 starts.
> #>
> #> The code will reset after 40 starts with no problems. The light
> #> resets sooner than that. If you light is still on, it's time to
> #> check your plug and anything attached to it...
> #>
> #> What engine do you have?
> #>
> #> /herb
>
> #I have the 6 cylinder. I think its a 4.0 ...it runs fine. It does not
> feel
> #like its missing.
>
> It is possible you don't feel anything because it is a in-line 6. A
> missing spark would probably go unnoticed, at least for a little while
> until you get problems from fuel in the exhaust. Before I had my YJ's
> original 4.2 I6 replaced, I pretty much had ziltch compression on my
> number 6 cylinder and I hardly noticed it unless doing 70+ on a steep
> (for a freeway) incline--then it felt like I was driving my mom's '81
> Honda-civic-putt-putt.
>
> On the 4.0, the sparkplugs fire twice per cycle as 3 ignition coils are
> shared by the 6 cylinders so you may want to also look at the other
> sparkplug that's tied to the number 1 cylinder's sparkplug.
>
> If you ever look at the engines that are used to demo the snake-oil
> additives on late night infomercials with sand and other crud dumped
> on top of the heads, it's always a I6.
>
> You should still check your plug and anything attached to it.
>
> /herb
Cylinders 1 & 6, 5 & 2, and 3 & 4 always fire together.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnaIf9tZ6QJLZRVn-vQ@speakeasy.net...
> In article <TQLPf.12279$nB6.925@news-wrt-01.rdc-nyc.rr.com>,
> Firebird <erodman@nyc.rr.com> wrote:
>
> #"Herb Leong" <herb@urusei.net> wrote in message
> #news:3qGdnfPjKL8uIJPZnZ2dnUVZ_vmdnZ2d@speakeasy.n et...
>
> #> In article <kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com>,
> #> Firebird <erodman@nyc.rr.com> wrote:
> #> #I got the light on the dashboard while waiting in line to exit a large
> #> #parking lot. THe engine had been idling for about 5-7 minutes. Code
> #> P0301
> #> #is a miss in cylinder 1, however I never felt anything and the engine
> #> runs
> #> #ok to me.
> #> #The light has been on the dashboard for about 3 weeks now.
> #> #How should I proceed. I thought it resets itself after 40 starts.
> #>
> #> The code will reset after 40 starts with no problems. The light
> #> resets sooner than that. If you light is still on, it's time to
> #> check your plug and anything attached to it...
> #>
> #> What engine do you have?
> #>
> #> /herb
>
> #I have the 6 cylinder. I think its a 4.0 ...it runs fine. It does not
> feel
> #like its missing.
>
> It is possible you don't feel anything because it is a in-line 6. A
> missing spark would probably go unnoticed, at least for a little while
> until you get problems from fuel in the exhaust. Before I had my YJ's
> original 4.2 I6 replaced, I pretty much had ziltch compression on my
> number 6 cylinder and I hardly noticed it unless doing 70+ on a steep
> (for a freeway) incline--then it felt like I was driving my mom's '81
> Honda-civic-putt-putt.
>
> On the 4.0, the sparkplugs fire twice per cycle as 3 ignition coils are
> shared by the 6 cylinders so you may want to also look at the other
> sparkplug that's tied to the number 1 cylinder's sparkplug.
>
> If you ever look at the engines that are used to demo the snake-oil
> additives on late night infomercials with sand and other crud dumped
> on top of the heads, it's always a I6.
>
> You should still check your plug and anything attached to it.
>
> /herb
03-09-2006, 02:54 AM
#57
Guest
Posts: n/a
Re: Code P0301
The 4 liter I-6 firing order is 1,5,3,6,2,4
Cylinders 1 & 6, 5 & 2, and 3 & 4 always fire together.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnaIf9tZ6QJLZRVn-vQ@speakeasy.net...
> In article <TQLPf.12279$nB6.925@news-wrt-01.rdc-nyc.rr.com>,
> Firebird <erodman@nyc.rr.com> wrote:
>
> #"Herb Leong" <herb@urusei.net> wrote in message
> #news:3qGdnfPjKL8uIJPZnZ2dnUVZ_vmdnZ2d@speakeasy.n et...
>
> #> In article <kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com>,
> #> Firebird <erodman@nyc.rr.com> wrote:
> #> #I got the light on the dashboard while waiting in line to exit a large
> #> #parking lot. THe engine had been idling for about 5-7 minutes. Code
> #> P0301
> #> #is a miss in cylinder 1, however I never felt anything and the engine
> #> runs
> #> #ok to me.
> #> #The light has been on the dashboard for about 3 weeks now.
> #> #How should I proceed. I thought it resets itself after 40 starts.
> #>
> #> The code will reset after 40 starts with no problems. The light
> #> resets sooner than that. If you light is still on, it's time to
> #> check your plug and anything attached to it...
> #>
> #> What engine do you have?
> #>
> #> /herb
>
> #I have the 6 cylinder. I think its a 4.0 ...it runs fine. It does not
> feel
> #like its missing.
>
> It is possible you don't feel anything because it is a in-line 6. A
> missing spark would probably go unnoticed, at least for a little while
> until you get problems from fuel in the exhaust. Before I had my YJ's
> original 4.2 I6 replaced, I pretty much had ziltch compression on my
> number 6 cylinder and I hardly noticed it unless doing 70+ on a steep
> (for a freeway) incline--then it felt like I was driving my mom's '81
> Honda-civic-putt-putt.
>
> On the 4.0, the sparkplugs fire twice per cycle as 3 ignition coils are
> shared by the 6 cylinders so you may want to also look at the other
> sparkplug that's tied to the number 1 cylinder's sparkplug.
>
> If you ever look at the engines that are used to demo the snake-oil
> additives on late night infomercials with sand and other crud dumped
> on top of the heads, it's always a I6.
>
> You should still check your plug and anything attached to it.
>
> /herb
Cylinders 1 & 6, 5 & 2, and 3 & 4 always fire together.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnaIf9tZ6QJLZRVn-vQ@speakeasy.net...
> In article <TQLPf.12279$nB6.925@news-wrt-01.rdc-nyc.rr.com>,
> Firebird <erodman@nyc.rr.com> wrote:
>
> #"Herb Leong" <herb@urusei.net> wrote in message
> #news:3qGdnfPjKL8uIJPZnZ2dnUVZ_vmdnZ2d@speakeasy.n et...
>
> #> In article <kxyPf.9577$4%1.6856@news-wrt-01.rdc-nyc.rr.com>,
> #> Firebird <erodman@nyc.rr.com> wrote:
> #> #I got the light on the dashboard while waiting in line to exit a large
> #> #parking lot. THe engine had been idling for about 5-7 minutes. Code
> #> P0301
> #> #is a miss in cylinder 1, however I never felt anything and the engine
> #> runs
> #> #ok to me.
> #> #The light has been on the dashboard for about 3 weeks now.
> #> #How should I proceed. I thought it resets itself after 40 starts.
> #>
> #> The code will reset after 40 starts with no problems. The light
> #> resets sooner than that. If you light is still on, it's time to
> #> check your plug and anything attached to it...
> #>
> #> What engine do you have?
> #>
> #> /herb
>
> #I have the 6 cylinder. I think its a 4.0 ...it runs fine. It does not
> feel
> #like its missing.
>
> It is possible you don't feel anything because it is a in-line 6. A
> missing spark would probably go unnoticed, at least for a little while
> until you get problems from fuel in the exhaust. Before I had my YJ's
> original 4.2 I6 replaced, I pretty much had ziltch compression on my
> number 6 cylinder and I hardly noticed it unless doing 70+ on a steep
> (for a freeway) incline--then it felt like I was driving my mom's '81
> Honda-civic-putt-putt.
>
> On the 4.0, the sparkplugs fire twice per cycle as 3 ignition coils are
> shared by the 6 cylinders so you may want to also look at the other
> sparkplug that's tied to the number 1 cylinder's sparkplug.
>
> If you ever look at the engines that are used to demo the snake-oil
> additives on late night infomercials with sand and other crud dumped
> on top of the heads, it's always a I6.
>
> You should still check your plug and anything attached to it.
>
> /herb
03-09-2006, 10:18 AM
#58
Guest
Posts: n/a
Re: Code P0301
It is easier to see sparks in the dark.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnd0f9tZkQ5LZRVn-vQ@speakeasy.net...
> In article <6bba0$440f9d7a$4831b233$8295@FUSE.NET>,
> billy ray <billy_ray@fuseSPAM.net> wrote:
> #If that fails you can try spraying a MIST of water around the coil rail.
> #sparkplug boot area while watching and listening for a spark leak. This
> is
> #best done away from shaded or dark area.
>
> Why away from shade or dark areas?
>
> /herb
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnd0f9tZkQ5LZRVn-vQ@speakeasy.net...
> In article <6bba0$440f9d7a$4831b233$8295@FUSE.NET>,
> billy ray <billy_ray@fuseSPAM.net> wrote:
> #If that fails you can try spraying a MIST of water around the coil rail.
> #sparkplug boot area while watching and listening for a spark leak. This
> is
> #best done away from shaded or dark area.
>
> Why away from shade or dark areas?
>
> /herb
03-09-2006, 10:18 AM
#59
Guest
Posts: n/a
Re: Code P0301
It is easier to see sparks in the dark.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnd0f9tZkQ5LZRVn-vQ@speakeasy.net...
> In article <6bba0$440f9d7a$4831b233$8295@FUSE.NET>,
> billy ray <billy_ray@fuseSPAM.net> wrote:
> #If that fails you can try spraying a MIST of water around the coil rail.
> #sparkplug boot area while watching and listening for a spark leak. This
> is
> #best done away from shaded or dark area.
>
> Why away from shade or dark areas?
>
> /herb
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnd0f9tZkQ5LZRVn-vQ@speakeasy.net...
> In article <6bba0$440f9d7a$4831b233$8295@FUSE.NET>,
> billy ray <billy_ray@fuseSPAM.net> wrote:
> #If that fails you can try spraying a MIST of water around the coil rail.
> #sparkplug boot area while watching and listening for a spark leak. This
> is
> #best done away from shaded or dark area.
>
> Why away from shade or dark areas?
>
> /herb
03-09-2006, 10:18 AM
#60
Guest
Posts: n/a
Re: Code P0301
It is easier to see sparks in the dark.
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnd0f9tZkQ5LZRVn-vQ@speakeasy.net...
> In article <6bba0$440f9d7a$4831b233$8295@FUSE.NET>,
> billy ray <billy_ray@fuseSPAM.net> wrote:
> #If that fails you can try spraying a MIST of water around the coil rail.
> #sparkplug boot area while watching and listening for a spark leak. This
> is
> #best done away from shaded or dark area.
>
> Why away from shade or dark areas?
>
> /herb
"Herb Leong" <herb@urusei.net> wrote in message
news:pfydnd0f9tZkQ5LZRVn-vQ@speakeasy.net...
> In article <6bba0$440f9d7a$4831b233$8295@FUSE.NET>,
> billy ray <billy_ray@fuseSPAM.net> wrote:
> #If that fails you can try spraying a MIST of water around the coil rail.
> #sparkplug boot area while watching and listening for a spark leak. This
> is
> #best done away from shaded or dark area.
>
> Why away from shade or dark areas?
>
> /herb