'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

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
>
>

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
>
>

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
>
>

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

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

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

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.

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.

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.