Re: 1998 Grand 8 cyl 5.9
 

In message <1158322821.028781.232450@i3g2000cwc.googlegroups. com>, "Ed" wrote:

>
>bllsht wrote:
>> In message <1158268539.893721.123660@b28g2000cwb.googlegroups .com>, "Ed" wrote:
>>
>> >A few days ago I bought a '98 Grand Cherokee with 8Cyl 5.9 and now I
>> >see that it might be necessary to use premium gas. Bad news but is it
>> >true?
>>
>> The 5.9 came programmed to run premium, but can be reprogrammed to run on
>> regular.
>
>Thanks to all who responded. I will use regular and see what happens
>and the mention about reprogramming will take care of any problem.
> Ed. Kelly

It will ping if you run regular without reprogramming it.

Re: 1998 Grand 8 cyl 5.9
 

In message <1158322821.028781.232450@i3g2000cwc.googlegroups. com>, "Ed" wrote:

>
>bllsht wrote:
>> In message <1158268539.893721.123660@b28g2000cwb.googlegroups .com>, "Ed" wrote:
>>
>> >A few days ago I bought a '98 Grand Cherokee with 8Cyl 5.9 and now I
>> >see that it might be necessary to use premium gas. Bad news but is it
>> >true?
>>
>> The 5.9 came programmed to run premium, but can be reprogrammed to run on
>> regular.
>
>Thanks to all who responded. I will use regular and see what happens
>and the mention about reprogramming will take care of any problem.
> Ed. Kelly

It will ping if you run regular without reprogramming it.

Re: 1998 Grand 8 cyl 5.9
 

In message <1158322821.028781.232450@i3g2000cwc.googlegroups. com>, "Ed" wrote:

>
>bllsht wrote:
>> In message <1158268539.893721.123660@b28g2000cwb.googlegroups .com>, "Ed" wrote:
>>
>> >A few days ago I bought a '98 Grand Cherokee with 8Cyl 5.9 and now I
>> >see that it might be necessary to use premium gas. Bad news but is it
>> >true?
>>
>> The 5.9 came programmed to run premium, but can be reprogrammed to run on
>> regular.
>
>Thanks to all who responded. I will use regular and see what happens
>and the mention about reprogramming will take care of any problem.
> Ed. Kelly

It will ping if you run regular without reprogramming it.

Re: 1998 Grand 8 cyl 5.9
 

In message <Xns984058AE91C8Fxs11eyahoocom@70.168.83.30>, "XS11E" wrote:

>"Doug" <nono@nono.com> wrote in
>news:AfmdnVf8_57eqJbYnZ2dnUVZ_rqdnZ2d@comcast.com :
>
>> FWIW I was told that the computer can be programmed for lower
>> octane gas.
>
>Correct, but as I said, it's a waste of time and money. The knock
>sensor will do exactly the same thing, retard the spark with exactly
>the same results, less performance and less gas mileage.

Nice advice except for one small problem. The 5.9 doesn't have a knock sensor.
It will happily ping it's self to death if you run regular without reprogramming
it.

>
>It's probably cheaper to run premium.
>
>Some engines have low compression kits available for them, I'm not sure
>the 5.9 is one of them. They may consist of low compression pistons or
>different cylinder heads which are VERY costly and it would take years
>to make up the cost in savings on gas price or there may be thicker
>head gaskets available, still costly because of the labor involved but
>much less than the other means of lowering compression...
>
>Again, it's cheaper to run premium and make sure your *next* vehicle
>runs on regular.
>
>As for shocks, I have a lift mounted on the back of my Jeep to carry a
>mobility scooter so I needed to get air adjustable rear shocks, that
>very much limited my choice, I just got what was cheap.
>
>

Re: 1998 Grand 8 cyl 5.9
 

In message <Xns984058AE91C8Fxs11eyahoocom@70.168.83.30>, "XS11E" wrote:

>"Doug" <nono@nono.com> wrote in
>news:AfmdnVf8_57eqJbYnZ2dnUVZ_rqdnZ2d@comcast.com :
>
>> FWIW I was told that the computer can be programmed for lower
>> octane gas.
>
>Correct, but as I said, it's a waste of time and money. The knock
>sensor will do exactly the same thing, retard the spark with exactly
>the same results, less performance and less gas mileage.

Nice advice except for one small problem. The 5.9 doesn't have a knock sensor.
It will happily ping it's self to death if you run regular without reprogramming
it.

>
>It's probably cheaper to run premium.
>
>Some engines have low compression kits available for them, I'm not sure
>the 5.9 is one of them. They may consist of low compression pistons or
>different cylinder heads which are VERY costly and it would take years
>to make up the cost in savings on gas price or there may be thicker
>head gaskets available, still costly because of the labor involved but
>much less than the other means of lowering compression...
>
>Again, it's cheaper to run premium and make sure your *next* vehicle
>runs on regular.
>
>As for shocks, I have a lift mounted on the back of my Jeep to carry a
>mobility scooter so I needed to get air adjustable rear shocks, that
>very much limited my choice, I just got what was cheap.
>
>

Re: 1998 Grand 8 cyl 5.9
 

In message <Xns984058AE91C8Fxs11eyahoocom@70.168.83.30>, "XS11E" wrote:

>"Doug" <nono@nono.com> wrote in
>news:AfmdnVf8_57eqJbYnZ2dnUVZ_rqdnZ2d@comcast.com :
>
>> FWIW I was told that the computer can be programmed for lower
>> octane gas.
>
>Correct, but as I said, it's a waste of time and money. The knock
>sensor will do exactly the same thing, retard the spark with exactly
>the same results, less performance and less gas mileage.

Nice advice except for one small problem. The 5.9 doesn't have a knock sensor.
It will happily ping it's self to death if you run regular without reprogramming
it.

>
>It's probably cheaper to run premium.
>
>Some engines have low compression kits available for them, I'm not sure
>the 5.9 is one of them. They may consist of low compression pistons or
>different cylinder heads which are VERY costly and it would take years
>to make up the cost in savings on gas price or there may be thicker
>head gaskets available, still costly because of the labor involved but
>much less than the other means of lowering compression...
>
>Again, it's cheaper to run premium and make sure your *next* vehicle
>runs on regular.
>
>As for shocks, I have a lift mounted on the back of my Jeep to carry a
>mobility scooter so I needed to get air adjustable rear shocks, that
>very much limited my choice, I just got what was cheap.
>
>

Re: 1998 Grand 8 cyl 5.9
 

http://www.ultralightnews.com/hirth/readingpistons.htm
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Ed wrote:
>
> A few days ago I bought a '98 Grand Cherokee with 8Cyl 5.9 and now I
> see that it might be necessary to use premium gas. Bad news but is it
> true?

Re: 1998 Grand 8 cyl 5.9
 

http://www.ultralightnews.com/hirth/readingpistons.htm
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Ed wrote:
>
> A few days ago I bought a '98 Grand Cherokee with 8Cyl 5.9 and now I
> see that it might be necessary to use premium gas. Bad news but is it
> true?

Re: 1998 Grand 8 cyl 5.9
 

http://www.ultralightnews.com/hirth/readingpistons.htm
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Ed wrote:
>
> A few days ago I bought a '98 Grand Cherokee with 8Cyl 5.9 and now I
> see that it might be necessary to use premium gas. Bad news but is it
> true?

Re: 1998 Grand 8 cyl 5.9
 

bllsht <nospam@invaliddot.net> wrote in
news:63lpg2tj8rvrhugo8s9sbh6mjsptffp0ja@4ax.com:

> In message <Xns984058AE91C8Fxs11eyahoocom@70.168.83.30>, "XS11E"
> wrote:
>
>>"Doug" <nono@nono.com> wrote in
>>news:AfmdnVf8_57eqJbYnZ2dnUVZ_rqdnZ2d@comcast.co m:
>>
>>> FWIW I was told that the computer can be programmed for lower
>>> octane gas.
>>
>>Correct, but as I said, it's a waste of time and money. The knock
>>sensor will do exactly the same thing, retard the spark with
>>exactly the same results, less performance and less gas mileage.
>
> Nice advice except for one small problem. The 5.9 doesn't have a
> knock sensor. It will happily ping it's self to death if you run
> regular without reprogramming it.

No knock sensor? Is it fuel injected?