The Haynes Manual shows a code for the gas cap and emissions system on a
'91. If it will set a code, it will trigger the check engine light.

Mike

Wblane wrote:
>
> Yeah, you were right, but I thought you and Mike R. (and some other people too,
> maybe even Bill ------) had decided it IS possible for a loose gas cap to cause
> the check engine light to go on? So can a loose gas cap cause the check engine
> light to come on or not?
>
> >>I've been having intermittent check engine light problems w/my Cherokee ever
> >>since I had the header swapped out. Now I know why,
> >
> >Gee, you mean the loose gas cap wasn't really causing the check engine light
> >to
> >come on? Imagine that.
>
> -Bill (remove "botizer" to reply via email)

 

The Haynes Manual shows a code for the gas cap and emissions system on a
'91. If it will set a code, it will trigger the check engine light.

Mike

Wblane wrote:
>
> Yeah, you were right, but I thought you and Mike R. (and some other people too,
> maybe even Bill ------) had decided it IS possible for a loose gas cap to cause
> the check engine light to go on? So can a loose gas cap cause the check engine
> light to come on or not?
>
> >>I've been having intermittent check engine light problems w/my Cherokee ever
> >>since I had the header swapped out. Now I know why,
> >
> >Gee, you mean the loose gas cap wasn't really causing the check engine light
> >to
> >come on? Imagine that.
>
> -Bill (remove "botizer" to reply via email)

 

The Haynes Manual shows a code for the gas cap and emissions system on a
'91. If it will set a code, it will trigger the check engine light.

Mike

Wblane wrote:
>
> Yeah, you were right, but I thought you and Mike R. (and some other people too,
> maybe even Bill ------) had decided it IS possible for a loose gas cap to cause
> the check engine light to go on? So can a loose gas cap cause the check engine
> light to come on or not?
>
> >>I've been having intermittent check engine light problems w/my Cherokee ever
> >>since I had the header swapped out. Now I know why,
> >
> >Gee, you mean the loose gas cap wasn't really causing the check engine light
> >to
> >come on? Imagine that.
>
> -Bill (remove "botizer" to reply via email)

 

Yes, the gas cap can cause a Check Engine Light.





"Wblane" <wblane@aol.combotizer> wrote in message
news:20040825154757.21353.00001924@mb-m18.aol.com...
> Yeah, you were right, but I thought you and Mike R. (and some other people
too,
> maybe even Bill ------) had decided it IS possible for a loose gas cap to
cause
> the check engine light to go on? So can a loose gas cap cause the check
engine
> light to come on or not?
>
> >>I've been having intermittent check engine light problems w/my Cherokee
ever
> >>since I had the header swapped out. Now I know why,
> >
> >Gee, you mean the loose gas cap wasn't really causing the check engine
light
> >to
> >come on? Imagine that.
>
>
> -Bill (remove "botizer" to reply via email)

 

Yes, the gas cap can cause a Check Engine Light.





"Wblane" <wblane@aol.combotizer> wrote in message
news:20040825154757.21353.00001924@mb-m18.aol.com...
> Yeah, you were right, but I thought you and Mike R. (and some other people
too,
> maybe even Bill ------) had decided it IS possible for a loose gas cap to
cause
> the check engine light to go on? So can a loose gas cap cause the check
engine
> light to come on or not?
>
> >>I've been having intermittent check engine light problems w/my Cherokee
ever
> >>since I had the header swapped out. Now I know why,
> >
> >Gee, you mean the loose gas cap wasn't really causing the check engine
light
> >to
> >come on? Imagine that.
>
>
> -Bill (remove "botizer" to reply via email)

 

Yes, the gas cap can cause a Check Engine Light.





"Wblane" <wblane@aol.combotizer> wrote in message
news:20040825154757.21353.00001924@mb-m18.aol.com...
> Yeah, you were right, but I thought you and Mike R. (and some other people
too,
> maybe even Bill ------) had decided it IS possible for a loose gas cap to
cause
> the check engine light to go on? So can a loose gas cap cause the check
engine
> light to come on or not?
>
> >>I've been having intermittent check engine light problems w/my Cherokee
ever
> >>since I had the header swapped out. Now I know why,
> >
> >Gee, you mean the loose gas cap wasn't really causing the check engine
light
> >to
> >come on? Imagine that.
>
>
> -Bill (remove "botizer" to reply via email)

 

Your vapor system is sealed, to save our atmosphere from fuel
vapor, now if the gas cap were loose, it wouldn't be sealed, would it?
Code, P0457: http://www.wjjeeps.com/faultcodes.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Wblane wrote:
>
> Yeah, you were right, but I thought you and Mike R. (and some other people too,
> maybe even Bill ------) had decided it IS possible for a loose gas cap to cause
> the check engine light to go on? So can a loose gas cap cause the check engine
> light to come on or not?

 

Your vapor system is sealed, to save our atmosphere from fuel
vapor, now if the gas cap were loose, it wouldn't be sealed, would it?
Code, P0457: http://www.wjjeeps.com/faultcodes.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Wblane wrote:
>
> Yeah, you were right, but I thought you and Mike R. (and some other people too,
> maybe even Bill ------) had decided it IS possible for a loose gas cap to cause
> the check engine light to go on? So can a loose gas cap cause the check engine
> light to come on or not?

 

Your vapor system is sealed, to save our atmosphere from fuel
vapor, now if the gas cap were loose, it wouldn't be sealed, would it?
Code, P0457: http://www.wjjeeps.com/faultcodes.htm
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Wblane wrote:
>
> Yeah, you were right, but I thought you and Mike R. (and some other people too,
> maybe even Bill ------) had decided it IS possible for a loose gas cap to cause
> the check engine light to go on? So can a loose gas cap cause the check engine
> light to come on or not?

 

In message <20040825154757.21353.00001924@mb-m18.aol.com>, "Wblane" wrote:

>Yeah, you were right, but I thought you and Mike R. (and some other people too,
>maybe even Bill ------) had decided it IS possible for a loose gas cap to cause
>the check engine light to go on? So can a loose gas cap cause the check engine
>light to come on or not?

Mike R and others think so but it's not the case. 91 XJ couldn't care less if
you have a gas cap or not. It doesn't even have an evap system trouble code
because it has no means to monitor the evap system.

>
>>>I've been having intermittent check engine light problems w/my Cherokee ever
>>>since I had the header swapped out. Now I know why,
>>
>>Gee, you mean the loose gas cap wasn't really causing the check engine light
>>to
>>come on? Imagine that.
>
>
>-Bill (remove "botizer" to reply via email)