diagram from front vacuum motor to transfer case of 1993 Jeep Wrangler
The vacuum lines, in a 1993 Honda accord, are controlled by a vacuum pump. The vacuum pump regulates the proper pressure in the vacuum lines.
check you vacuum lines
It's a vacuum leak somewhere in the system. There are several vacuum lines that operate the blend doors on the system. If there is a leak where the system will not hold vacuum, it will default to defrost automatically.
erratic idle can most times be tracked to a vacuum issue, check all your lines for leaks
Did this b/4I have a 94 wrangler with the vacuum switch on the transfer. It shouldn't be any different for your jeep. The vacuum switch cost about $20 or less. Just get a big socket or wrench to remove and replace AND BE ABSOLUTELY CERTAIN OF THE VACUUM LINE ORDER/PLACEMENT. In fact, the way I did this was to use a huge socket wrench to break the threads loose after marking corresponding vacuum lines and nipples. If this doesn't do it, inspect the vacuum lines going to the switch. If you do the vacuum lines check and all is good check the shifting fork, mine brokeon me. It cost 5 dollars at a junk yard.
Your Jeep Wrangler is not getting the proper amount of gas if it stalling when you come to a complete stop. This could be your fuel pump, fuel lines, or the intakes.
Vacuum lines supply vacuum for various functions.
The brakes need to be bled, or is there no vacuum pressure? in that case you need to check all vacuum lines, including the ones for the cabin and other accessories, not just the brakes.
where do the vacuum lines go on the 91 4runner
No, the brake lines on a 1997 Wrangler are typically not metric. They are usually measured in inches.
On a Grand Wagoneer, the 4x4 vacuum lines are typically located near the transfer case and the front axle. These lines are part of the system that engages the front axle when 4WD is activated. You can usually find them running from the vacuum actuator on the transfer case to the front differential. It's important to check for any leaks or damage in these lines to ensure proper 4WD operation.