no heat from vents

[DrThunder]

do you think that useing a smaller vacume tank from a 98 on a 91 that had the larger volume tank would effect it. cuz thats what i did. i broke the stock one and only could find a smaller 97+ one at the JY. im talking about the tank in the bumper.

I'm sure the tank would work but you probably fucked up the lines, just get rid of the tank and connect the two lines coming down.

[Ktmracer419]

do you think that useing a smaller vacume tank from a 98 on a 91 that had the larger volume tank would effect it. cuz thats what i did. i broke the stock one and only could find a smaller 97+ one at the JY. im talking about the tank in the bumper.

it would still work

Mine fell off this weekend and all I did was plug the line that goes into that tank. Everything works fine though

not when you accelerate hard


if its not a leaking vacuum line, its a plugged vacuum line, check em' where they enter the intake manifold and blow em' out

[clean4drxj]

the tank on the front bumper i switch to the newer style and all my stuff still works mint, i think thats just to engadge your 4X4 at the T case... someone correct me if i'm wrong

[JoeNitro]

the tank on the front bumper i switch to the newer style and all my stuff still works mint, i think thats just to engadge your 4X4 at the T case... someone correct me if i'm wrong

as far as i know.... there is nothing vacume related to you t-case its all mechanical when you pull the lever.

[JeepJuggalo]

check your lines

when you pull out the control panel from the dash you'll see a cluster of colored vacum line, pull them off with it running you should hear a little whistle, if you do you have vaccum going to the switch, if you dont it became disconnected somwhere, or rotted away. so you'll have to run vaccum inside to that switch, i'm not sure which port it is, but under the hood by the heater box you will se a vacum line goin inside the cab. if you pull the connector off inside and it whistles plug it back in, your problem is one of the lines going to the vacum actuated door, or the vacum actuator itself. sometimes the diaphrams inside them dry rot and the cant hold the vacum to switch the door. good luck.

[JoeNitro]

i found it.

i found out that there was no vacume to the switch in the dash. i traced the feed line to the switch back to a junction under the hood followed all the leads and found that i had a blocked check valve. the last inlet on the intake manifold (to the back of the motor) has a small oneway check valve and it was plugged up it took it out, blew out the valve with some air and everything works fine... thanks for the help guys.

[Ktmracer419]

the tank on the front bumper i switch to the newer style and all my stuff still works mint, i think thats just to engadge your 4X4 at the T case... someone correct me if i'm wrong

wrong

i found it.

i found out that there was no vacume to the switch in the dash. i traced the feed line to the switch back to a junction under the hood followed all the leads and found that i had a blocked check valve. the last inlet on the intake manifold (to the back of the motor) has a small oneway check valve and it was plugged up it took it out, blew out the valve with some air and everything works fine... thanks for the help guys.

I WAS RIGHT NUKKAS

[DrThunder]

wrong



I WAS RIGHT NUKKAS

I WAS RIGHT FIRST NUKKA