4.0 L spark knock
11-10-2004, 06:51 AM
#21
Guest
Posts: n/a
Re: 4.0 L spark knock
Isn't a butterfly valve part of a carburator? Don't know engines well
enough to know for sure....
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:41911FC3.2517BBB@***.net...
> Hi Dale,
> Just after you crack the the butterfly you're going to be under
> eight pounds, if you can't find a gas station with high enough octane
> then you're going to have to retard the spark. Even the stock computer
> is programmable, but it takes DRB-III scanner:
> http://search.ebay.com/DRB-III_W0QQs...ectZ1QQfromZR8 Maybe
> the shop that sold you blower will pull it back for free.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
>>
>> I have a 00 TJ - 4.0. I am getting what I call spark knock at lower RPMs
>> under
>> light acceleration. This is a fairly recent development and I have
>> gotten
>> little help in identifying the cause of the problem. The engine is
>> stock
>> except for the following: Avenger Supercharger with associated larger
>> than
>> stock injectors. A 700R4 AT which has the crank position sensor relocated
>> to
>> the front crankshaft pulley. I burn hi-octane fuel exclusively. I
>> cannot see
>> how the supercharger install would produce this effect, as the engine is
>> not
>> showing boost when the knocking appears. In my old car days I would
>> suspect
>> the timing to be at fault but this computer ignition system is way beyond
>> me.
>> Does anyone have experience with this or suggestion where I might direct
>> my
>> search?
>> tia dw
enough to know for sure....
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:41911FC3.2517BBB@***.net...
> Hi Dale,
> Just after you crack the the butterfly you're going to be under
> eight pounds, if you can't find a gas station with high enough octane
> then you're going to have to retard the spark. Even the stock computer
> is programmable, but it takes DRB-III scanner:
> http://search.ebay.com/DRB-III_W0QQs...ectZ1QQfromZR8 Maybe
> the shop that sold you blower will pull it back for free.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
>>
>> I have a 00 TJ - 4.0. I am getting what I call spark knock at lower RPMs
>> under
>> light acceleration. This is a fairly recent development and I have
>> gotten
>> little help in identifying the cause of the problem. The engine is
>> stock
>> except for the following: Avenger Supercharger with associated larger
>> than
>> stock injectors. A 700R4 AT which has the crank position sensor relocated
>> to
>> the front crankshaft pulley. I burn hi-octane fuel exclusively. I
>> cannot see
>> how the supercharger install would produce this effect, as the engine is
>> not
>> showing boost when the knocking appears. In my old car days I would
>> suspect
>> the timing to be at fault but this computer ignition system is way beyond
>> me.
>> Does anyone have experience with this or suggestion where I might direct
>> my
>> search?
>> tia dw
11-10-2004, 06:51 AM
#22
Guest
Posts: n/a
Re: 4.0 L spark knock
Isn't a butterfly valve part of a carburator? Don't know engines well
enough to know for sure....
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:41911FC3.2517BBB@***.net...
> Hi Dale,
> Just after you crack the the butterfly you're going to be under
> eight pounds, if you can't find a gas station with high enough octane
> then you're going to have to retard the spark. Even the stock computer
> is programmable, but it takes DRB-III scanner:
> http://search.ebay.com/DRB-III_W0QQs...ectZ1QQfromZR8 Maybe
> the shop that sold you blower will pull it back for free.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
>>
>> I have a 00 TJ - 4.0. I am getting what I call spark knock at lower RPMs
>> under
>> light acceleration. This is a fairly recent development and I have
>> gotten
>> little help in identifying the cause of the problem. The engine is
>> stock
>> except for the following: Avenger Supercharger with associated larger
>> than
>> stock injectors. A 700R4 AT which has the crank position sensor relocated
>> to
>> the front crankshaft pulley. I burn hi-octane fuel exclusively. I
>> cannot see
>> how the supercharger install would produce this effect, as the engine is
>> not
>> showing boost when the knocking appears. In my old car days I would
>> suspect
>> the timing to be at fault but this computer ignition system is way beyond
>> me.
>> Does anyone have experience with this or suggestion where I might direct
>> my
>> search?
>> tia dw
enough to know for sure....
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:41911FC3.2517BBB@***.net...
> Hi Dale,
> Just after you crack the the butterfly you're going to be under
> eight pounds, if you can't find a gas station with high enough octane
> then you're going to have to retard the spark. Even the stock computer
> is programmable, but it takes DRB-III scanner:
> http://search.ebay.com/DRB-III_W0QQs...ectZ1QQfromZR8 Maybe
> the shop that sold you blower will pull it back for free.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Dalewhite wrote:
>>
>> I have a 00 TJ - 4.0. I am getting what I call spark knock at lower RPMs
>> under
>> light acceleration. This is a fairly recent development and I have
>> gotten
>> little help in identifying the cause of the problem. The engine is
>> stock
>> except for the following: Avenger Supercharger with associated larger
>> than
>> stock injectors. A 700R4 AT which has the crank position sensor relocated
>> to
>> the front crankshaft pulley. I burn hi-octane fuel exclusively. I
>> cannot see
>> how the supercharger install would produce this effect, as the engine is
>> not
>> showing boost when the knocking appears. In my old car days I would
>> suspect
>> the timing to be at fault but this computer ignition system is way beyond
>> me.
>> Does anyone have experience with this or suggestion where I might direct
>> my
>> search?
>> tia dw
11-10-2004, 03:34 PM
#23
Guest
Posts: n/a
Re: 4.0 L spark knock
Yup, a carburetor, too.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
11-10-2004, 03:34 PM
#24
Guest
Posts: n/a
Re: 4.0 L spark knock
Yup, a carburetor, too.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
11-10-2004, 03:34 PM
#25
Guest
Posts: n/a
Re: 4.0 L spark knock
Yup, a carburetor, too.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
11-10-2004, 04:19 PM
#26
Guest
Posts: n/a
Re: 4.0 L spark knock
Or on a Top Fuel car:
http://www.nhra.com/2003/gallery/tf/...me=Larry_Dixon
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
http://www.nhra.com/2003/gallery/tf/...me=Larry_Dixon
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
11-10-2004, 04:19 PM
#27
Guest
Posts: n/a
Re: 4.0 L spark knock
Or on a Top Fuel car:
http://www.nhra.com/2003/gallery/tf/...me=Larry_Dixon
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
http://www.nhra.com/2003/gallery/tf/...me=Larry_Dixon
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
11-10-2004, 04:19 PM
#28
Guest
Posts: n/a
Re: 4.0 L spark knock
Or on a Top Fuel car:
http://www.nhra.com/2003/gallery/tf/...me=Larry_Dixon
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
http://www.nhra.com/2003/gallery/tf/...me=Larry_Dixon
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
SteveBrady wrote:
>
> Isn't a butterfly valve part of a carburator? Don't know engines well
> enough to know for sure....
11-10-2004, 08:13 PM
#29
Guest
Posts: n/a
Re: 4.0 L spark knock
Dale:
I would like to here more about your Avenger Supercharger. I have a 2k tj
and plan on a supercharger. I am increasing cooling (griffin radiator) - if
quadrtec will ever send it. Then header and exhaust. Then the supercharger.
Why did your pick Avenger?
Did you install yourself?
Any problems?
What's it like to drive?
Thanks - Allen
I would like to here more about your Avenger Supercharger. I have a 2k tj
and plan on a supercharger. I am increasing cooling (griffin radiator) - if
quadrtec will ever send it. Then header and exhaust. Then the supercharger.
Why did your pick Avenger?
Did you install yourself?
Any problems?
What's it like to drive?
Thanks - Allen
11-10-2004, 08:13 PM
#30
Guest
Posts: n/a
Re: 4.0 L spark knock
Dale:
I would like to here more about your Avenger Supercharger. I have a 2k tj
and plan on a supercharger. I am increasing cooling (griffin radiator) - if
quadrtec will ever send it. Then header and exhaust. Then the supercharger.
Why did your pick Avenger?
Did you install yourself?
Any problems?
What's it like to drive?
Thanks - Allen
I would like to here more about your Avenger Supercharger. I have a 2k tj
and plan on a supercharger. I am increasing cooling (griffin radiator) - if
quadrtec will ever send it. Then header and exhaust. Then the supercharger.
Why did your pick Avenger?
Did you install yourself?
Any problems?
What's it like to drive?
Thanks - Allen