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Unread 01-11-2011, 06:02 PM   #1
Davetopay
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The old heater control/cruise problem

Driving to work today my cruise control was set at 65 on the highway and then just quit. The light was on, but the throttle was released. I continued on my way.

Leaving work tonight, I had heat only on the defroster vents. No floor, no dash.

I know this has to be a vacuum issue, but where to look? I bought the Jeep last month at Carmax, so if it is more than a simple rubber hose issue I am taking it in for warranty work. What are the most common places to see this issue?

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Unread 01-11-2011, 06:12 PM   #2
Howdy
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heater

Look under the hood not under the dash. Probably under the battery or on the firewall.
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Unread 01-11-2011, 06:30 PM   #3
Knuckelhead
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Quote:
Originally Posted by Howdy View Post
Look under the hood not under the dash. Probably under the battery or on the firewall.
Or on the intake manifold...
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Unread 01-12-2011, 06:51 PM   #4
Davetopay
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Originally Posted by Knuckelhead View Post
Or on the intake manifold...
Bingo.

One of the vac lines going to the cruise came unplugged. No big deal. I guess I will need to give it a few drive cycles to relearn the fuel maps though. It likes to surge a bit when on the brake approaching a stop.
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Unread 01-12-2011, 06:55 PM   #5
Knuckelhead
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Originally Posted by Davetopay View Post
Bingo.

One of the vac lines going to the cruise came unplugged. No big deal. I guess I will need to give it a few drive cycles to relearn the fuel maps though. It likes to surge a bit when on the brake approaching a stop.
Glad I could be of some help...
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