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Old 11-14-2015, 01:22 PM
Thread Starter
Join Date: Oct 2015
Location: Texas Panhandle
Posts: 10
Vacuum lines 03 TJ

My Jeep has thrown a p1494 Leak Detection pump code. The 3 vacuum boots coming off the intake manifold, low on the manifold, driver's side are decaying badly and one had a zip tie on it. That is the fix I believe the dealer made when he told me it coded before I came to pick it up. I cannot find a diagram or new boots for these lines anywhere on the net. One is a hard hose coming off the vapor canister purge valve. the next looks to be a fuel vapor line. Connects to aluminum line and runs with two other lines back to fuel tank. Third, closest to firewall is small vac boot that goes to cruise and HVAC. Any ideas on where to find these boots and/or lines with boots would be appreciated. I also have an issue with hvac. The dash air on the dial selector gives mostly floor air and a little dash. Defrost, floor and blend all work okay. Thanks for any help.


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Old 12-28-2015, 09:49 PM   #2
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Join Date: Dec 2015
Location: Fishhawk
Posts: 26
Did you ever find a diagram? I'm looking for a diagram for the lines as well. Had 2 of them break and now its a bitch trying to find the right parts. I believe I found the parts I need but I wanted a diagram to make sure its the right parts.

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Old 01-01-2016, 08:37 PM   #3
Join Date: Apr 2013
Location: Suffolk, Virginia
Posts: 262
Here's a link to Morris 4x4. I wasn't able to find a diagram for your vehicle, but I found some parts you may be looking for. Check out items 60 through 62. I didn't see the HVAC vacuum harness which is odd because I swear I've seen it on this website before. However, most of this stuff like rubber hose and elbows you can find at a local parts store. I replaced the rubber stuff and kept the hard plastic lines since they still looked good and held vacuum. As for your ventilation controls, fixing vacuum leaks under the hood might help, but sometimes the problem is in the vacuum lines under the dash.

Jeep Engine Parts | 4.0 Liter (242) AMC Engine | Morris 4x4 Center
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Old 01-01-2016, 09:14 PM   #4
Join Date: Apr 2013
Posts: 13,017
No the leak detection pump is the Evap system for the fuel vapors

If you are lucky it is a loose or leaking gas cap but if not one of the connections or the solenoid valve or Evap pump itself is bad

Not the lines to the intake the lines to the gas tank
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