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mabar 12-10-2003 11:04 AM

'02 TJ pinging under load
 
My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
truck plugs at about 32,000 miles and gapped them correctly to 0.35".

No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
a couple of months ago.

Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
Ohio) is the problem, but there was absolutely no pinging last winter.

Any ideas?

Tom



Jerry Bransford 12-10-2003 11:07 AM

Re: '02 TJ pinging under load
 
How would you characterize your usual daily driving style? Conservative?
Maybe ultra-conservative? Moderate? Hard-accelerations on a regular basis?
Depending on you answer, there could be a reason for the pinging...

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
KC6TAY, PP-ASEL
See the Geezer Jeep at
http://members.cox.net/jerrypb/

"mabar" <mabar@NOSPAMgbronline.com> wrote in message
news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new

Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just

started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?
>
> Tom
>
>




Jerry Bransford 12-10-2003 11:07 AM

Re: '02 TJ pinging under load
 
How would you characterize your usual daily driving style? Conservative?
Maybe ultra-conservative? Moderate? Hard-accelerations on a regular basis?
Depending on you answer, there could be a reason for the pinging...

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
KC6TAY, PP-ASEL
See the Geezer Jeep at
http://members.cox.net/jerrypb/

"mabar" <mabar@NOSPAMgbronline.com> wrote in message
news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new

Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just

started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?
>
> Tom
>
>




Jerry Bransford 12-10-2003 11:07 AM

Re: '02 TJ pinging under load
 
How would you characterize your usual daily driving style? Conservative?
Maybe ultra-conservative? Moderate? Hard-accelerations on a regular basis?
Depending on you answer, there could be a reason for the pinging...

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
KC6TAY, PP-ASEL
See the Geezer Jeep at
http://members.cox.net/jerrypb/

"mabar" <mabar@NOSPAMgbronline.com> wrote in message
news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new

Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just

started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?
>
> Tom
>
>




L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III 12-10-2003 01:49 PM

Re: '02 TJ pinging under load
 
Hi Tom,
Switch oil companies, until you find one with good cleaner
additives, and maybe a compromise in octane for the price you're willing
to pay. Don't force it to ping:
http://www.stanford.edu/~bmoses/knock.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

mabar wrote:
>
> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?
>
> Tom


L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III 12-10-2003 01:49 PM

Re: '02 TJ pinging under load
 
Hi Tom,
Switch oil companies, until you find one with good cleaner
additives, and maybe a compromise in octane for the price you're willing
to pay. Don't force it to ping:
http://www.stanford.edu/~bmoses/knock.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

mabar wrote:
>
> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?
>
> Tom


L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III 12-10-2003 01:49 PM

Re: '02 TJ pinging under load
 
Hi Tom,
Switch oil companies, until you find one with good cleaner
additives, and maybe a compromise in octane for the price you're willing
to pay. Don't force it to ping:
http://www.stanford.edu/~bmoses/knock.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

mabar wrote:
>
> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?
>
> Tom


Lon Stowell 12-10-2003 06:26 PM

Re: '02 TJ pinging under load
 
Roughly 12/10/03 08:04, mabar's monkeys randomly typed:

> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?


You might try using a different brand and hope you get lucky. Or
try the middle cost semi-premium. The missus' '95 4.0 does the
same thing under light load at low-moderate rpm where the transmission
doesn't downshift under moderate accel. Dealer claims it is harmless
but it is annoying enough I just step up one grade at lower
elevations.

--
Fan of the dumbest team in America.


Lon Stowell 12-10-2003 06:26 PM

Re: '02 TJ pinging under load
 
Roughly 12/10/03 08:04, mabar's monkeys randomly typed:

> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?


You might try using a different brand and hope you get lucky. Or
try the middle cost semi-premium. The missus' '95 4.0 does the
same thing under light load at low-moderate rpm where the transmission
doesn't downshift under moderate accel. Dealer claims it is harmless
but it is annoying enough I just step up one grade at lower
elevations.

--
Fan of the dumbest team in America.


Lon Stowell 12-10-2003 06:26 PM

Re: '02 TJ pinging under load
 
Roughly 12/10/03 08:04, mabar's monkeys randomly typed:

> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?


You might try using a different brand and hope you get lucky. Or
try the middle cost semi-premium. The missus' '95 4.0 does the
same thing under light load at low-moderate rpm where the transmission
doesn't downshift under moderate accel. Dealer claims it is harmless
but it is annoying enough I just step up one grade at lower
elevations.

--
Fan of the dumbest team in America.


mabar 12-10-2003 07:47 PM

Re: '02 TJ pinging under load
 
I guess moderate. 1/2 city, 1/2 freeway. Some fast starts. Freeway speed is
usually around 70 mph. Definitely not conservative.

Tom

"Jerry Bransford" <jerrypb@mecox.net> wrote in message
news:nxHBb.43820$Bk1.4470@fed1read05...
> How would you characterize your usual daily driving style? Conservative?
> Maybe ultra-conservative? Moderate? Hard-accelerations on a regular

basis?
> Depending on you answer, there could be a reason for the pinging...
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> KC6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
>
> "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> > My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight

load.
> > Not knocking, but pinging. It has 35000 miles on it. I put in new

> Champion
> > truck plugs at about 32,000 miles and gapped them correctly to 0.35".
> >
> > No pinging if I use 89 octane gas, only with 87 octane. Pinging just

> started
> > a couple of months ago.
> >
> > Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> > Ohio) is the problem, but there was absolutely no pinging last winter.
> >
> > Any ideas?
> >
> > Tom
> >
> >

>
>




mabar 12-10-2003 07:47 PM

Re: '02 TJ pinging under load
 
I guess moderate. 1/2 city, 1/2 freeway. Some fast starts. Freeway speed is
usually around 70 mph. Definitely not conservative.

Tom

"Jerry Bransford" <jerrypb@mecox.net> wrote in message
news:nxHBb.43820$Bk1.4470@fed1read05...
> How would you characterize your usual daily driving style? Conservative?
> Maybe ultra-conservative? Moderate? Hard-accelerations on a regular

basis?
> Depending on you answer, there could be a reason for the pinging...
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> KC6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
>
> "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> > My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight

load.
> > Not knocking, but pinging. It has 35000 miles on it. I put in new

> Champion
> > truck plugs at about 32,000 miles and gapped them correctly to 0.35".
> >
> > No pinging if I use 89 octane gas, only with 87 octane. Pinging just

> started
> > a couple of months ago.
> >
> > Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> > Ohio) is the problem, but there was absolutely no pinging last winter.
> >
> > Any ideas?
> >
> > Tom
> >
> >

>
>




mabar 12-10-2003 07:47 PM

Re: '02 TJ pinging under load
 
I guess moderate. 1/2 city, 1/2 freeway. Some fast starts. Freeway speed is
usually around 70 mph. Definitely not conservative.

Tom

"Jerry Bransford" <jerrypb@mecox.net> wrote in message
news:nxHBb.43820$Bk1.4470@fed1read05...
> How would you characterize your usual daily driving style? Conservative?
> Maybe ultra-conservative? Moderate? Hard-accelerations on a regular

basis?
> Depending on you answer, there could be a reason for the pinging...
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> KC6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
>
> "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> > My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight

load.
> > Not knocking, but pinging. It has 35000 miles on it. I put in new

> Champion
> > truck plugs at about 32,000 miles and gapped them correctly to 0.35".
> >
> > No pinging if I use 89 octane gas, only with 87 octane. Pinging just

> started
> > a couple of months ago.
> >
> > Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> > Ohio) is the problem, but there was absolutely no pinging last winter.
> >
> > Any ideas?
> >
> > Tom
> >
> >

>
>




Tim Hayes 12-10-2003 07:56 PM

Re: '02 TJ pinging under load
 
My 5 month old '03 did the same thing recently when it started to get
colder. I suspect the winter gas as well. Using 89 stopped it for me
too. I tried to go back to 87 for a couple of tanks but the pinging came
back. I'm going to just feed it 89 until spring.

I suppose the timing could be adjusted, but then I'd have to change that
back when it gets warmer or deal with the resulting power loss or
excessive emmisions.

mabar wrote:
> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?
>
> Tom
>
>



Tim Hayes 12-10-2003 07:56 PM

Re: '02 TJ pinging under load
 
My 5 month old '03 did the same thing recently when it started to get
colder. I suspect the winter gas as well. Using 89 stopped it for me
too. I tried to go back to 87 for a couple of tanks but the pinging came
back. I'm going to just feed it 89 until spring.

I suppose the timing could be adjusted, but then I'd have to change that
back when it gets warmer or deal with the resulting power loss or
excessive emmisions.

mabar wrote:
> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?
>
> Tom
>
>



Tim Hayes 12-10-2003 07:56 PM

Re: '02 TJ pinging under load
 
My 5 month old '03 did the same thing recently when it started to get
colder. I suspect the winter gas as well. Using 89 stopped it for me
too. I tried to go back to 87 for a couple of tanks but the pinging came
back. I'm going to just feed it 89 until spring.

I suppose the timing could be adjusted, but then I'd have to change that
back when it gets warmer or deal with the resulting power loss or
excessive emmisions.

mabar wrote:
> My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight load.
> Not knocking, but pinging. It has 35000 miles on it. I put in new Champion
> truck plugs at about 32,000 miles and gapped them correctly to 0.35".
>
> No pinging if I use 89 octane gas, only with 87 octane. Pinging just started
> a couple of months ago.
>
> Runs fine otherwise. I am guessing re-formulated winter gas (Cleveland,
> Ohio) is the problem, but there was absolutely no pinging last winter.
>
> Any ideas?
>
> Tom
>
>



Jerry Bransford 12-10-2003 09:30 PM

Re: '02 TJ pinging under load
 
Ok, I was going to suggest that it might have a bit of a carbon build-up in
the combustion chambers if you drive ultra-conservatively. Carbon can cause
pinging by it continuing to glow after the combustion stroke, prematurely
igniting the next cycle's air-fuel mixture. The cure is to either blow the
carbon out by driving ultra-aggressively or cleaning it out with either a
chemical cleaner or carefully and slowly dribbling 12 to 16 ounces of water
into the combustion chamber through the air intake while the engine runs.

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
KC6TAY, PP-ASEL
See the Geezer Jeep at
http://members.cox.net/jerrypb/

"mabar" <mabar@NOSPAMgbronline.com> wrote in message
news:kfOdneXhsPniI0qiRVn-tw@gbronline.com...
> I guess moderate. 1/2 city, 1/2 freeway. Some fast starts. Freeway speed

is
> usually around 70 mph. Definitely not conservative.
>
> Tom
>
> "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> news:nxHBb.43820$Bk1.4470@fed1read05...
> > How would you characterize your usual daily driving style?

Conservative?
> > Maybe ultra-conservative? Moderate? Hard-accelerations on a regular

> basis?
> > Depending on you answer, there could be a reason for the pinging...
> >
> > Jerry
> > --
> > Jerry Bransford
> > To email, remove 'me' from my email address
> > KC6TAY, PP-ASEL
> > See the Geezer Jeep at
> > http://members.cox.net/jerrypb/
> >
> > "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> > news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> > > My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight

> load.
> > > Not knocking, but pinging. It has 35000 miles on it. I put in new

> > Champion
> > > truck plugs at about 32,000 miles and gapped them correctly to 0.35".
> > >
> > > No pinging if I use 89 octane gas, only with 87 octane. Pinging just

> > started
> > > a couple of months ago.
> > >
> > > Runs fine otherwise. I am guessing re-formulated winter gas

(Cleveland,
> > > Ohio) is the problem, but there was absolutely no pinging last winter.
> > >
> > > Any ideas?
> > >
> > > Tom
> > >
> > >

> >
> >

>
>




Jerry Bransford 12-10-2003 09:30 PM

Re: '02 TJ pinging under load
 
Ok, I was going to suggest that it might have a bit of a carbon build-up in
the combustion chambers if you drive ultra-conservatively. Carbon can cause
pinging by it continuing to glow after the combustion stroke, prematurely
igniting the next cycle's air-fuel mixture. The cure is to either blow the
carbon out by driving ultra-aggressively or cleaning it out with either a
chemical cleaner or carefully and slowly dribbling 12 to 16 ounces of water
into the combustion chamber through the air intake while the engine runs.

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
KC6TAY, PP-ASEL
See the Geezer Jeep at
http://members.cox.net/jerrypb/

"mabar" <mabar@NOSPAMgbronline.com> wrote in message
news:kfOdneXhsPniI0qiRVn-tw@gbronline.com...
> I guess moderate. 1/2 city, 1/2 freeway. Some fast starts. Freeway speed

is
> usually around 70 mph. Definitely not conservative.
>
> Tom
>
> "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> news:nxHBb.43820$Bk1.4470@fed1read05...
> > How would you characterize your usual daily driving style?

Conservative?
> > Maybe ultra-conservative? Moderate? Hard-accelerations on a regular

> basis?
> > Depending on you answer, there could be a reason for the pinging...
> >
> > Jerry
> > --
> > Jerry Bransford
> > To email, remove 'me' from my email address
> > KC6TAY, PP-ASEL
> > See the Geezer Jeep at
> > http://members.cox.net/jerrypb/
> >
> > "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> > news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> > > My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight

> load.
> > > Not knocking, but pinging. It has 35000 miles on it. I put in new

> > Champion
> > > truck plugs at about 32,000 miles and gapped them correctly to 0.35".
> > >
> > > No pinging if I use 89 octane gas, only with 87 octane. Pinging just

> > started
> > > a couple of months ago.
> > >
> > > Runs fine otherwise. I am guessing re-formulated winter gas

(Cleveland,
> > > Ohio) is the problem, but there was absolutely no pinging last winter.
> > >
> > > Any ideas?
> > >
> > > Tom
> > >
> > >

> >
> >

>
>




Jerry Bransford 12-10-2003 09:30 PM

Re: '02 TJ pinging under load
 
Ok, I was going to suggest that it might have a bit of a carbon build-up in
the combustion chambers if you drive ultra-conservatively. Carbon can cause
pinging by it continuing to glow after the combustion stroke, prematurely
igniting the next cycle's air-fuel mixture. The cure is to either blow the
carbon out by driving ultra-aggressively or cleaning it out with either a
chemical cleaner or carefully and slowly dribbling 12 to 16 ounces of water
into the combustion chamber through the air intake while the engine runs.

Jerry
--
Jerry Bransford
To email, remove 'me' from my email address
KC6TAY, PP-ASEL
See the Geezer Jeep at
http://members.cox.net/jerrypb/

"mabar" <mabar@NOSPAMgbronline.com> wrote in message
news:kfOdneXhsPniI0qiRVn-tw@gbronline.com...
> I guess moderate. 1/2 city, 1/2 freeway. Some fast starts. Freeway speed

is
> usually around 70 mph. Definitely not conservative.
>
> Tom
>
> "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> news:nxHBb.43820$Bk1.4470@fed1read05...
> > How would you characterize your usual daily driving style?

Conservative?
> > Maybe ultra-conservative? Moderate? Hard-accelerations on a regular

> basis?
> > Depending on you answer, there could be a reason for the pinging...
> >
> > Jerry
> > --
> > Jerry Bransford
> > To email, remove 'me' from my email address
> > KC6TAY, PP-ASEL
> > See the Geezer Jeep at
> > http://members.cox.net/jerrypb/
> >
> > "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> > news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> > > My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight

> load.
> > > Not knocking, but pinging. It has 35000 miles on it. I put in new

> > Champion
> > > truck plugs at about 32,000 miles and gapped them correctly to 0.35".
> > >
> > > No pinging if I use 89 octane gas, only with 87 octane. Pinging just

> > started
> > > a couple of months ago.
> > >
> > > Runs fine otherwise. I am guessing re-formulated winter gas

(Cleveland,
> > > Ohio) is the problem, but there was absolutely no pinging last winter.
> > >
> > > Any ideas?
> > >
> > > Tom
> > >
> > >

> >
> >

>
>




mabar 12-12-2003 08:51 AM

Re: '02 TJ pinging under load
 
Thanks everyone for your suggestions. I think it might just be the
re-formulated winter gas. On some tanks it pings, on others it doesn't.

Thanks,

Tom

"Jerry Bransford" <jerrypb@mecox.net> wrote in message
news:YEQBb.28$kB6.25@fed1read05...
> Ok, I was going to suggest that it might have a bit of a carbon build-up

in
> the combustion chambers if you drive ultra-conservatively. Carbon can

cause
> pinging by it continuing to glow after the combustion stroke, prematurely
> igniting the next cycle's air-fuel mixture. The cure is to either blow

the
> carbon out by driving ultra-aggressively or cleaning it out with either a
> chemical cleaner or carefully and slowly dribbling 12 to 16 ounces of

water
> into the combustion chamber through the air intake while the engine runs.
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> KC6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
>
> "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> news:kfOdneXhsPniI0qiRVn-tw@gbronline.com...
> > I guess moderate. 1/2 city, 1/2 freeway. Some fast starts. Freeway speed

> is
> > usually around 70 mph. Definitely not conservative.
> >
> > Tom
> >
> > "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> > news:nxHBb.43820$Bk1.4470@fed1read05...
> > > How would you characterize your usual daily driving style?

> Conservative?
> > > Maybe ultra-conservative? Moderate? Hard-accelerations on a regular

> > basis?
> > > Depending on you answer, there could be a reason for the pinging...
> > >
> > > Jerry
> > > --
> > > Jerry Bransford
> > > To email, remove 'me' from my email address
> > > KC6TAY, PP-ASEL
> > > See the Geezer Jeep at
> > > http://members.cox.net/jerrypb/
> > >
> > > "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> > > news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> > > > My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight

> > load.
> > > > Not knocking, but pinging. It has 35000 miles on it. I put in new
> > > Champion
> > > > truck plugs at about 32,000 miles and gapped them correctly to

0.35".
> > > >
> > > > No pinging if I use 89 octane gas, only with 87 octane. Pinging just
> > > started
> > > > a couple of months ago.
> > > >
> > > > Runs fine otherwise. I am guessing re-formulated winter gas

> (Cleveland,
> > > > Ohio) is the problem, but there was absolutely no pinging last

winter.
> > > >
> > > > Any ideas?
> > > >
> > > > Tom
> > > >
> > > >
> > >
> > >

> >
> >

>
>




mabar 12-12-2003 08:51 AM

Re: '02 TJ pinging under load
 
Thanks everyone for your suggestions. I think it might just be the
re-formulated winter gas. On some tanks it pings, on others it doesn't.

Thanks,

Tom

"Jerry Bransford" <jerrypb@mecox.net> wrote in message
news:YEQBb.28$kB6.25@fed1read05...
> Ok, I was going to suggest that it might have a bit of a carbon build-up

in
> the combustion chambers if you drive ultra-conservatively. Carbon can

cause
> pinging by it continuing to glow after the combustion stroke, prematurely
> igniting the next cycle's air-fuel mixture. The cure is to either blow

the
> carbon out by driving ultra-aggressively or cleaning it out with either a
> chemical cleaner or carefully and slowly dribbling 12 to 16 ounces of

water
> into the combustion chamber through the air intake while the engine runs.
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> KC6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
>
> "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> news:kfOdneXhsPniI0qiRVn-tw@gbronline.com...
> > I guess moderate. 1/2 city, 1/2 freeway. Some fast starts. Freeway speed

> is
> > usually around 70 mph. Definitely not conservative.
> >
> > Tom
> >
> > "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> > news:nxHBb.43820$Bk1.4470@fed1read05...
> > > How would you characterize your usual daily driving style?

> Conservative?
> > > Maybe ultra-conservative? Moderate? Hard-accelerations on a regular

> > basis?
> > > Depending on you answer, there could be a reason for the pinging...
> > >
> > > Jerry
> > > --
> > > Jerry Bransford
> > > To email, remove 'me' from my email address
> > > KC6TAY, PP-ASEL
> > > See the Geezer Jeep at
> > > http://members.cox.net/jerrypb/
> > >
> > > "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> > > news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> > > > My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight

> > load.
> > > > Not knocking, but pinging. It has 35000 miles on it. I put in new
> > > Champion
> > > > truck plugs at about 32,000 miles and gapped them correctly to

0.35".
> > > >
> > > > No pinging if I use 89 octane gas, only with 87 octane. Pinging just
> > > started
> > > > a couple of months ago.
> > > >
> > > > Runs fine otherwise. I am guessing re-formulated winter gas

> (Cleveland,
> > > > Ohio) is the problem, but there was absolutely no pinging last

winter.
> > > >
> > > > Any ideas?
> > > >
> > > > Tom
> > > >
> > > >
> > >
> > >

> >
> >

>
>




mabar 12-12-2003 08:51 AM

Re: '02 TJ pinging under load
 
Thanks everyone for your suggestions. I think it might just be the
re-formulated winter gas. On some tanks it pings, on others it doesn't.

Thanks,

Tom

"Jerry Bransford" <jerrypb@mecox.net> wrote in message
news:YEQBb.28$kB6.25@fed1read05...
> Ok, I was going to suggest that it might have a bit of a carbon build-up

in
> the combustion chambers if you drive ultra-conservatively. Carbon can

cause
> pinging by it continuing to glow after the combustion stroke, prematurely
> igniting the next cycle's air-fuel mixture. The cure is to either blow

the
> carbon out by driving ultra-aggressively or cleaning it out with either a
> chemical cleaner or carefully and slowly dribbling 12 to 16 ounces of

water
> into the combustion chamber through the air intake while the engine runs.
>
> Jerry
> --
> Jerry Bransford
> To email, remove 'me' from my email address
> KC6TAY, PP-ASEL
> See the Geezer Jeep at
> http://members.cox.net/jerrypb/
>
> "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> news:kfOdneXhsPniI0qiRVn-tw@gbronline.com...
> > I guess moderate. 1/2 city, 1/2 freeway. Some fast starts. Freeway speed

> is
> > usually around 70 mph. Definitely not conservative.
> >
> > Tom
> >
> > "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> > news:nxHBb.43820$Bk1.4470@fed1read05...
> > > How would you characterize your usual daily driving style?

> Conservative?
> > > Maybe ultra-conservative? Moderate? Hard-accelerations on a regular

> > basis?
> > > Depending on you answer, there could be a reason for the pinging...
> > >
> > > Jerry
> > > --
> > > Jerry Bransford
> > > To email, remove 'me' from my email address
> > > KC6TAY, PP-ASEL
> > > See the Geezer Jeep at
> > > http://members.cox.net/jerrypb/
> > >
> > > "mabar" <mabar@NOSPAMgbronline.com> wrote in message
> > > news:OoqdnWPSacy_2UqiRVn-sA@gbronline.com...
> > > > My '02 TJ, 6-cyl, auto is pinging under load. Sometimes only slight

> > load.
> > > > Not knocking, but pinging. It has 35000 miles on it. I put in new
> > > Champion
> > > > truck plugs at about 32,000 miles and gapped them correctly to

0.35".
> > > >
> > > > No pinging if I use 89 octane gas, only with 87 octane. Pinging just
> > > started
> > > > a couple of months ago.
> > > >
> > > > Runs fine otherwise. I am guessing re-formulated winter gas

> (Cleveland,
> > > > Ohio) is the problem, but there was absolutely no pinging last

winter.
> > > >
> > > > Any ideas?
> > > >
> > > > Tom
> > > >
> > > >
> > >
> > >

> >
> >

>
>





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