Trouble Code 43
 

Hi all! Subject code came up twice. Does that mean I have two cylinders
misfiring? Any suggestions on what is causing the misfires before I take it
to a shop? Vehicle is a 1996 Jeep Grand Cherokee I6 40.L 4x4. Mileage is
175K. Thanks for your input.
Fernan

Re: Trouble Code 43
 

Hi Fernan,
Please don't cross post, it is a violation of our group's charter:
ftp://ftp.uu.net/usenet/news.announc...rs.jeep+willys
Code #43, Ignition Coil:
http://minimopar.knizefamily.net/fault/code43.html
Do the normal maintenance, like spark plugs every thirty thousand
miles: http://www.----------.com/lubeschedule.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

"F.D.S." wrote:
>
> Hi all! Subject code came up twice. Does that mean I have two cylinders
> misfiring? Any suggestions on what is causing the misfires before I take it
> to a shop? Vehicle is a 1996 Jeep Grand Cherokee I6 40.L 4x4. Mileage is
> 175K. Thanks for your input.
> Fernan

Re: Trouble Code 43
 

Hi Fernan,
Please don't cross post, it is a violation of our group's charter:
ftp://ftp.uu.net/usenet/news.announc...rs.jeep+willys
Code #43, Ignition Coil:
http://minimopar.knizefamily.net/fault/code43.html
Do the normal maintenance, like spark plugs every thirty thousand
miles: http://www.----------.com/lubeschedule.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

"F.D.S." wrote:
>
> Hi all! Subject code came up twice. Does that mean I have two cylinders
> misfiring? Any suggestions on what is causing the misfires before I take it
> to a shop? Vehicle is a 1996 Jeep Grand Cherokee I6 40.L 4x4. Mileage is
> 175K. Thanks for your input.
> Fernan

Re: Trouble Code 43
 

Hi Fernan,
Please don't cross post, it is a violation of our group's charter:
ftp://ftp.uu.net/usenet/news.announc...rs.jeep+willys
Code #43, Ignition Coil:
http://minimopar.knizefamily.net/fault/code43.html
Do the normal maintenance, like spark plugs every thirty thousand
miles: http://www.----------.com/lubeschedule.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

"F.D.S." wrote:
>
> Hi all! Subject code came up twice. Does that mean I have two cylinders
> misfiring? Any suggestions on what is causing the misfires before I take it
> to a shop? Vehicle is a 1996 Jeep Grand Cherokee I6 40.L 4x4. Mileage is
> 175K. Thanks for your input.
> Fernan

Re: Trouble Code 43
 

Hi Fernan,
Please don't cross post, it is a violation of our group's charter:
ftp://ftp.uu.net/usenet/news.announc...rs.jeep+willys
Code #43, Ignition Coil:
http://minimopar.knizefamily.net/fault/code43.html
Do the normal maintenance, like spark plugs every thirty thousand
miles: http://www.----------.com/lubeschedule.pdf
God Bless America, ßill O|||||||O
mailto:--------------------

"F.D.S." wrote:
>
> Hi all! Subject code came up twice. Does that mean I have two cylinders
> misfiring? Any suggestions on what is causing the misfires before I take it
> to a shop? Vehicle is a 1996 Jeep Grand Cherokee I6 40.L 4x4. Mileage is
> 175K. Thanks for your input.
> Fernan

Re: Trouble Code 43
 

I have extensive experience with this code but relax, there is a way to cure
it. I replaced literally everything possible, ignition related, trying to
cure my multiple '43' codes, up to three of them at once. Plugs, wiring,
distributor, rotor, ignition coil, etc. Then a Detroit-based Jeep engineer
contacted me after seeing my multiple posts on this problem and sent me a
bunch of parts for free to try since his engineering department was very
curious about it. From that kit, I replaced the fuel injectors, the FI
wiring harness, and the entire computer... still no help.

Then a local Jeep buddy clued me in to a new TSB (tech service bulletin) on
the problem. It turns out that during the '96/'97 model year, there was a
bad/weak batch of valve springs causing valve float which caused cylinder
misfires. Replacing my valve springs finally cured the problem. Your
dealer can tell you about the TSB.

Jerry

--
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/
"F.D.S." <no.spam@mail.com> wrote in message
news:mOudnS6377yNnJncRVn-sA@adelphia.com...
> Hi all! Subject code came up twice. Does that mean I have two cylinders
> misfiring? Any suggestions on what is causing the misfires before I take
it
> to a shop? Vehicle is a 1996 Jeep Grand Cherokee I6 40.L 4x4. Mileage is
> 175K. Thanks for your input.
> Fernan
>
>

Re: Trouble Code 43
 

I have extensive experience with this code but relax, there is a way to cure
it. I replaced literally everything possible, ignition related, trying to
cure my multiple '43' codes, up to three of them at once. Plugs, wiring,
distributor, rotor, ignition coil, etc. Then a Detroit-based Jeep engineer
contacted me after seeing my multiple posts on this problem and sent me a
bunch of parts for free to try since his engineering department was very
curious about it. From that kit, I replaced the fuel injectors, the FI
wiring harness, and the entire computer... still no help.

Then a local Jeep buddy clued me in to a new TSB (tech service bulletin) on
the problem. It turns out that during the '96/'97 model year, there was a
bad/weak batch of valve springs causing valve float which caused cylinder
misfires. Replacing my valve springs finally cured the problem. Your
dealer can tell you about the TSB.

Jerry

--
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/
"F.D.S." <no.spam@mail.com> wrote in message
news:mOudnS6377yNnJncRVn-sA@adelphia.com...
> Hi all! Subject code came up twice. Does that mean I have two cylinders
> misfiring? Any suggestions on what is causing the misfires before I take
it
> to a shop? Vehicle is a 1996 Jeep Grand Cherokee I6 40.L 4x4. Mileage is
> 175K. Thanks for your input.
> Fernan
>
>

Re: Trouble Code 43
 

I have extensive experience with this code but relax, there is a way to cure
it. I replaced literally everything possible, ignition related, trying to
cure my multiple '43' codes, up to three of them at once. Plugs, wiring,
distributor, rotor, ignition coil, etc. Then a Detroit-based Jeep engineer
contacted me after seeing my multiple posts on this problem and sent me a
bunch of parts for free to try since his engineering department was very
curious about it. From that kit, I replaced the fuel injectors, the FI
wiring harness, and the entire computer... still no help.

Then a local Jeep buddy clued me in to a new TSB (tech service bulletin) on
the problem. It turns out that during the '96/'97 model year, there was a
bad/weak batch of valve springs causing valve float which caused cylinder
misfires. Replacing my valve springs finally cured the problem. Your
dealer can tell you about the TSB.

Jerry

--
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/
"F.D.S." <no.spam@mail.com> wrote in message
news:mOudnS6377yNnJncRVn-sA@adelphia.com...
> Hi all! Subject code came up twice. Does that mean I have two cylinders
> misfiring? Any suggestions on what is causing the misfires before I take
it
> to a shop? Vehicle is a 1996 Jeep Grand Cherokee I6 40.L 4x4. Mileage is
> 175K. Thanks for your input.
> Fernan
>
>

Re: Trouble Code 43
 

I have extensive experience with this code but relax, there is a way to cure
it. I replaced literally everything possible, ignition related, trying to
cure my multiple '43' codes, up to three of them at once. Plugs, wiring,
distributor, rotor, ignition coil, etc. Then a Detroit-based Jeep engineer
contacted me after seeing my multiple posts on this problem and sent me a
bunch of parts for free to try since his engineering department was very
curious about it. From that kit, I replaced the fuel injectors, the FI
wiring harness, and the entire computer... still no help.

Then a local Jeep buddy clued me in to a new TSB (tech service bulletin) on
the problem. It turns out that during the '96/'97 model year, there was a
bad/weak batch of valve springs causing valve float which caused cylinder
misfires. Replacing my valve springs finally cured the problem. Your
dealer can tell you about the TSB.

Jerry

--
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.net/jerrypb/
"F.D.S." <no.spam@mail.com> wrote in message
news:mOudnS6377yNnJncRVn-sA@adelphia.com...
> Hi all! Subject code came up twice. Does that mean I have two cylinders
> misfiring? Any suggestions on what is causing the misfires before I take
it
> to a shop? Vehicle is a 1996 Jeep Grand Cherokee I6 40.L 4x4. Mileage is
> 175K. Thanks for your input.
> Fernan
>
>

Re: Trouble Code 43
 

Fascinating, Jerry. What a PIA that must've been.

Jerry Bransford wrote:

> I have extensive experience with this code but relax, there is a way to cure
> it. I replaced literally everything possible, ignition related, trying to
> cure my multiple '43' codes, up to three of them at once. Plugs, wiring,
> distributor, rotor, ignition coil, etc. Then a Detroit-based Jeep engineer
> contacted me after seeing my multiple posts on this problem and sent me a
> bunch of parts for free to try since his engineering department was very
> curious about it. From that kit, I replaced the fuel injectors, the FI
> wiring harness, and the entire computer... still no help.
>
> Then a local Jeep buddy clued me in to a new TSB (tech service bulletin) on
> the problem. It turns out that during the '96/'97 model year, there was a
> bad/weak batch of valve springs causing valve float which caused cylinder
> misfires. Replacing my valve springs finally cured the problem. Your
> dealer can tell you about the TSB.
>
> Jerry
>

--
__________________________________________________ _________
tw

03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport

There is a very fine line between "hobby" and "mental illness."
-- Dave Barry

Pronunciation: 'jEp
Function: noun
Date: 1940

Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.

(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________