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

 

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.***.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
>
>

 

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.***.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
>
>

 

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.***.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
>
>

 

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

 

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

 

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

 

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.

 

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.

 

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.