The older Jeep Cherokees (88-92) had a vacuum reservoir inside the
right front bumper. Two vacuum lines went from there to the HVAC and
other things like the speed control. The lines went under/behind the
battery. Over time the line wore out (acid ate through) and the Jeep
had both the HVAC and speed control problem. Look at the vacuum lines
then see if there is still a vacuum reservoir.

JB wrote:
> Hmm, this sounds the most plausible. I'll bring it to the attention of
> the mechanic so he can look further.
>
> Many thanks to the others who responded, too.
>
> Janie
>
> Earle Horton wrote:
> > Your vacuum reservoir is collapsed, or there is a vacuum leak.

 

My husband looked and couldn't see a vacuum reservoir. Looks like we'll
have to take it in and have somebody take a closer look. Thanks!

Janie

Howard wrote:
> The older Jeep Cherokees (88-92) had a vacuum reservoir inside the
> right front bumper. Two vacuum lines went from there to the HVAC and
> other things like the speed control. The lines went under/behind the
> battery. Over time the line wore out (acid ate through) and the Jeep
> had both the HVAC and speed control problem. Look at the vacuum lines
> then see if there is still a vacuum reservoir.

 

My husband looked and couldn't see a vacuum reservoir. Looks like we'll
have to take it in and have somebody take a closer look. Thanks!

Janie

Howard wrote:
> The older Jeep Cherokees (88-92) had a vacuum reservoir inside the
> right front bumper. Two vacuum lines went from there to the HVAC and
> other things like the speed control. The lines went under/behind the
> battery. Over time the line wore out (acid ate through) and the Jeep
> had both the HVAC and speed control problem. Look at the vacuum lines
> then see if there is still a vacuum reservoir.

 

My husband looked and couldn't see a vacuum reservoir. Looks like we'll
have to take it in and have somebody take a closer look. Thanks!

Janie

Howard wrote:
> The older Jeep Cherokees (88-92) had a vacuum reservoir inside the
> right front bumper. Two vacuum lines went from there to the HVAC and
> other things like the speed control. The lines went under/behind the
> battery. Over time the line wore out (acid ate through) and the Jeep
> had both the HVAC and speed control problem. Look at the vacuum lines
> then see if there is still a vacuum reservoir.

 

My husband looked and couldn't see a vacuum reservoir. Looks like we'll
have to take it in and have somebody take a closer look. Thanks!

Janie

Howard wrote:
> The older Jeep Cherokees (88-92) had a vacuum reservoir inside the
> right front bumper. Two vacuum lines went from there to the HVAC and
> other things like the speed control. The lines went under/behind the
> battery. Over time the line wore out (acid ate through) and the Jeep
> had both the HVAC and speed control problem. Look at the vacuum lines
> then see if there is still a vacuum reservoir.

 

Thanks, Bill. It wasn't overheating. That's the neat thing about my
Jeep - it pulls my little tent trailer like there's nothing to it, and
no loss of gas mileage either. <g>

Janie

L.W.(Bill) ------ III wrote:
> Hi Janie,
> All manufactures design their computers to shut the air conditioner
> off if the engine is in danger of over heating. Maybe, add an auxiliary
> transmission cooler if you're going to haul a trailer again.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/

 

Thanks, Bill. It wasn't overheating. That's the neat thing about my
Jeep - it pulls my little tent trailer like there's nothing to it, and
no loss of gas mileage either. <g>

Janie

L.W.(Bill) ------ III wrote:
> Hi Janie,
> All manufactures design their computers to shut the air conditioner
> off if the engine is in danger of over heating. Maybe, add an auxiliary
> transmission cooler if you're going to haul a trailer again.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/

 

Thanks, Bill. It wasn't overheating. That's the neat thing about my
Jeep - it pulls my little tent trailer like there's nothing to it, and
no loss of gas mileage either. <g>

Janie

L.W.(Bill) ------ III wrote:
> Hi Janie,
> All manufactures design their computers to shut the air conditioner
> off if the engine is in danger of over heating. Maybe, add an auxiliary
> transmission cooler if you're going to haul a trailer again.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/

 

Thanks, Bill. It wasn't overheating. That's the neat thing about my
Jeep - it pulls my little tent trailer like there's nothing to it, and
no loss of gas mileage either. <g>

Janie

L.W.(Bill) ------ III wrote:
> Hi Janie,
> All manufactures design their computers to shut the air conditioner
> off if the engine is in danger of over heating. Maybe, add an auxiliary
> transmission cooler if you're going to haul a trailer again.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/

 

Neither was a line of new cars stopped in traffic leaving Las
Vegas, but as far as I could see everyone had their windows down.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

JB wrote:
>
> Thanks, Bill. It wasn't overheating. That's the neat thing about my
> Jeep - it pulls my little tent trailer like there's nothing to it, and
> no loss of gas mileage either. <g>
>
> Janie