Rough idle when hot
 

Hi all,

I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone with
a '94 Wrangler can help out too :). On my way back from a very long road
trip, it started running rough every once in a while. This is while I was
going about 70 MPH down I-20. I made it back without incident, but it's
been getting progressively worse. Now, after running for about 5-10
minutes (cold or hot), it'll start to miss, then backfire, then finally the
engine will die. I can re-start it in a few minutes and run for a while
again, but will soon start to miss, backfire, then die.

The engine and fuel injection kit have been in for about two years now, and
were running OK up to this point. I thought I might have picked up a bad
batch of gas, so dumped in some "Sea Foam" to absorb any water, and
replaced the fuel filter - neither had any effect, positive or negative. I
also went back to slightly hotter spark plugs I used just before I left on
the road trip, which also had no effect.

Any hints on how to solve this (or where to begin) would be greatly
appreciated.

Thanks in advance.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891

Re: Rough idle when hot
 

Hi Michael,
Replace the ignition coil.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Michael White wrote:
>
> Hi all,
>
> I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone with
> a '94 Wrangler can help out too :). On my way back from a very long road
> trip, it started running rough every once in a while. This is while I was
> going about 70 MPH down I-20. I made it back without incident, but it's
> been getting progressively worse. Now, after running for about 5-10
> minutes (cold or hot), it'll start to miss, then backfire, then finally the
> engine will die. I can re-start it in a few minutes and run for a while
> again, but will soon start to miss, backfire, then die.
>
> The engine and fuel injection kit have been in for about two years now, and
> were running OK up to this point. I thought I might have picked up a bad
> batch of gas, so dumped in some "Sea Foam" to absorb any water, and
> replaced the fuel filter - neither had any effect, positive or negative. I
> also went back to slightly hotter spark plugs I used just before I left on
> the road trip, which also had no effect.
>
> Any hints on how to solve this (or where to begin) would be greatly
> appreciated.
>
> Thanks in advance.
> --
> Michael White "To protect people from the effects of folly is to
> fill the world with fools." -Herbert Spencer, 1891

Re: Rough idle when hot
 

Hi Michael,
Replace the ignition coil.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Michael White wrote:
>
> Hi all,
>
> I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone with
> a '94 Wrangler can help out too :). On my way back from a very long road
> trip, it started running rough every once in a while. This is while I was
> going about 70 MPH down I-20. I made it back without incident, but it's
> been getting progressively worse. Now, after running for about 5-10
> minutes (cold or hot), it'll start to miss, then backfire, then finally the
> engine will die. I can re-start it in a few minutes and run for a while
> again, but will soon start to miss, backfire, then die.
>
> The engine and fuel injection kit have been in for about two years now, and
> were running OK up to this point. I thought I might have picked up a bad
> batch of gas, so dumped in some "Sea Foam" to absorb any water, and
> replaced the fuel filter - neither had any effect, positive or negative. I
> also went back to slightly hotter spark plugs I used just before I left on
> the road trip, which also had no effect.
>
> Any hints on how to solve this (or where to begin) would be greatly
> appreciated.
>
> Thanks in advance.
> --
> Michael White "To protect people from the effects of folly is to
> fill the world with fools." -Herbert Spencer, 1891

Re: Rough idle when hot
 

Hi Michael,
Replace the ignition coil.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Michael White wrote:
>
> Hi all,
>
> I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone with
> a '94 Wrangler can help out too :). On my way back from a very long road
> trip, it started running rough every once in a while. This is while I was
> going about 70 MPH down I-20. I made it back without incident, but it's
> been getting progressively worse. Now, after running for about 5-10
> minutes (cold or hot), it'll start to miss, then backfire, then finally the
> engine will die. I can re-start it in a few minutes and run for a while
> again, but will soon start to miss, backfire, then die.
>
> The engine and fuel injection kit have been in for about two years now, and
> were running OK up to this point. I thought I might have picked up a bad
> batch of gas, so dumped in some "Sea Foam" to absorb any water, and
> replaced the fuel filter - neither had any effect, positive or negative. I
> also went back to slightly hotter spark plugs I used just before I left on
> the road trip, which also had no effect.
>
> Any hints on how to solve this (or where to begin) would be greatly
> appreciated.
>
> Thanks in advance.
> --
> Michael White "To protect people from the effects of folly is to
> fill the world with fools." -Herbert Spencer, 1891

Re: Rough idle when hot
 

When was the last time you changed the air filter on the gas tank vent?
A vacuum on the gas tank can sort of act like that.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Michael White wrote:
>
> Hi all,
>
> I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone with
> a '94 Wrangler can help out too :). On my way back from a very long road
> trip, it started running rough every once in a while. This is while I was
> going about 70 MPH down I-20. I made it back without incident, but it's
> been getting progressively worse. Now, after running for about 5-10
> minutes (cold or hot), it'll start to miss, then backfire, then finally the
> engine will die. I can re-start it in a few minutes and run for a while
> again, but will soon start to miss, backfire, then die.
>
> The engine and fuel injection kit have been in for about two years now, and
> were running OK up to this point. I thought I might have picked up a bad
> batch of gas, so dumped in some "Sea Foam" to absorb any water, and
> replaced the fuel filter - neither had any effect, positive or negative. I
> also went back to slightly hotter spark plugs I used just before I left on
> the road trip, which also had no effect.
>
> Any hints on how to solve this (or where to begin) would be greatly
> appreciated.
>
> Thanks in advance.
> --
> Michael White "To protect people from the effects of folly is to
> fill the world with fools." -Herbert Spencer, 1891

Re: Rough idle when hot
 

When was the last time you changed the air filter on the gas tank vent?
A vacuum on the gas tank can sort of act like that.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Michael White wrote:
>
> Hi all,
>
> I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone with
> a '94 Wrangler can help out too :). On my way back from a very long road
> trip, it started running rough every once in a while. This is while I was
> going about 70 MPH down I-20. I made it back without incident, but it's
> been getting progressively worse. Now, after running for about 5-10
> minutes (cold or hot), it'll start to miss, then backfire, then finally the
> engine will die. I can re-start it in a few minutes and run for a while
> again, but will soon start to miss, backfire, then die.
>
> The engine and fuel injection kit have been in for about two years now, and
> were running OK up to this point. I thought I might have picked up a bad
> batch of gas, so dumped in some "Sea Foam" to absorb any water, and
> replaced the fuel filter - neither had any effect, positive or negative. I
> also went back to slightly hotter spark plugs I used just before I left on
> the road trip, which also had no effect.
>
> Any hints on how to solve this (or where to begin) would be greatly
> appreciated.
>
> Thanks in advance.
> --
> Michael White "To protect people from the effects of folly is to
> fill the world with fools." -Herbert Spencer, 1891

Re: Rough idle when hot
 

When was the last time you changed the air filter on the gas tank vent?
A vacuum on the gas tank can sort of act like that.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Michael White wrote:
>
> Hi all,
>
> I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone with
> a '94 Wrangler can help out too :). On my way back from a very long road
> trip, it started running rough every once in a while. This is while I was
> going about 70 MPH down I-20. I made it back without incident, but it's
> been getting progressively worse. Now, after running for about 5-10
> minutes (cold or hot), it'll start to miss, then backfire, then finally the
> engine will die. I can re-start it in a few minutes and run for a while
> again, but will soon start to miss, backfire, then die.
>
> The engine and fuel injection kit have been in for about two years now, and
> were running OK up to this point. I thought I might have picked up a bad
> batch of gas, so dumped in some "Sea Foam" to absorb any water, and
> replaced the fuel filter - neither had any effect, positive or negative. I
> also went back to slightly hotter spark plugs I used just before I left on
> the road trip, which also had no effect.
>
> Any hints on how to solve this (or where to begin) would be greatly
> appreciated.
>
> Thanks in advance.
> --
> Michael White "To protect people from the effects of folly is to
> fill the world with fools." -Herbert Spencer, 1891

Re: Rough idle when hot
 

Mike,

Are you referring to the one in the Charcoal cannister? If so, that whole
setup when in about two years ago. The air filter (K&N from the Mopar kit)
I cleaned a few weeks ago. Is there another filter I should check?

Thanks.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891

Mike Romain (romainm@sympatico.ca) wrote on Wednesday 29 September 2004
08:59 am:

> When was the last time you changed the air filter on the gas tank vent?
> A vacuum on the gas tank can sort of act like that.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Michael White wrote:
>>
>> Hi all,
>>
>> I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone
>> with
>> a '94 Wrangler can help out too :). On my way back from a very long road
>> trip, it started running rough every once in a while. This is while I
>> was
>> going about 70 MPH down I-20. I made it back without incident, but it's
>> been getting progressively worse. Now, after running for about 5-10
>> minutes (cold or hot), it'll start to miss, then backfire, then finally
>> the
>> engine will die. I can re-start it in a few minutes and run for a while
>> again, but will soon start to miss, backfire, then die.
>>
>> The engine and fuel injection kit have been in for about two years now,
>> and
>> were running OK up to this point. I thought I might have picked up a bad
>> batch of gas, so dumped in some "Sea Foam" to absorb any water, and
>> replaced the fuel filter - neither had any effect, positive or negative.
>> I also went back to slightly hotter spark plugs I used just before I left
>> on the road trip, which also had no effect.
>>
>> Any hints on how to solve this (or where to begin) would be greatly
>> appreciated.
>>
>> Thanks in advance.
>> --
>> Michael White "To protect people from the effects of folly is to
>> fill the world with fools." -Herbert Spencer, 1891

Re: Rough idle when hot
 

Mike,

Are you referring to the one in the Charcoal cannister? If so, that whole
setup when in about two years ago. The air filter (K&N from the Mopar kit)
I cleaned a few weeks ago. Is there another filter I should check?

Thanks.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891

Mike Romain (romainm@sympatico.ca) wrote on Wednesday 29 September 2004
08:59 am:

> When was the last time you changed the air filter on the gas tank vent?
> A vacuum on the gas tank can sort of act like that.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Michael White wrote:
>>
>> Hi all,
>>
>> I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone
>> with
>> a '94 Wrangler can help out too :). On my way back from a very long road
>> trip, it started running rough every once in a while. This is while I
>> was
>> going about 70 MPH down I-20. I made it back without incident, but it's
>> been getting progressively worse. Now, after running for about 5-10
>> minutes (cold or hot), it'll start to miss, then backfire, then finally
>> the
>> engine will die. I can re-start it in a few minutes and run for a while
>> again, but will soon start to miss, backfire, then die.
>>
>> The engine and fuel injection kit have been in for about two years now,
>> and
>> were running OK up to this point. I thought I might have picked up a bad
>> batch of gas, so dumped in some "Sea Foam" to absorb any water, and
>> replaced the fuel filter - neither had any effect, positive or negative.
>> I also went back to slightly hotter spark plugs I used just before I left
>> on the road trip, which also had no effect.
>>
>> Any hints on how to solve this (or where to begin) would be greatly
>> appreciated.
>>
>> Thanks in advance.
>> --
>> Michael White "To protect people from the effects of folly is to
>> fill the world with fools." -Herbert Spencer, 1891

Re: Rough idle when hot
 

Mike,

Are you referring to the one in the Charcoal cannister? If so, that whole
setup when in about two years ago. The air filter (K&N from the Mopar kit)
I cleaned a few weeks ago. Is there another filter I should check?

Thanks.
--
Michael White "To protect people from the effects of folly is to
fill the world with fools." -Herbert Spencer, 1891

Mike Romain (romainm@sympatico.ca) wrote on Wednesday 29 September 2004
08:59 am:

> When was the last time you changed the air filter on the gas tank vent?
> A vacuum on the gas tank can sort of act like that.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Michael White wrote:
>>
>> Hi all,
>>
>> I've got an '82 Scrambler with the Mopar fuel injection kit (so anyone
>> with
>> a '94 Wrangler can help out too :). On my way back from a very long road
>> trip, it started running rough every once in a while. This is while I
>> was
>> going about 70 MPH down I-20. I made it back without incident, but it's
>> been getting progressively worse. Now, after running for about 5-10
>> minutes (cold or hot), it'll start to miss, then backfire, then finally
>> the
>> engine will die. I can re-start it in a few minutes and run for a while
>> again, but will soon start to miss, backfire, then die.
>>
>> The engine and fuel injection kit have been in for about two years now,
>> and
>> were running OK up to this point. I thought I might have picked up a bad
>> batch of gas, so dumped in some "Sea Foam" to absorb any water, and
>> replaced the fuel filter - neither had any effect, positive or negative.
>> I also went back to slightly hotter spark plugs I used just before I left
>> on the road trip, which also had no effect.
>>
>> Any hints on how to solve this (or where to begin) would be greatly
>> appreciated.
>>
>> Thanks in advance.
>> --
>> Michael White "To protect people from the effects of folly is to
>> fill the world with fools." -Herbert Spencer, 1891