Part Solution for HVAC Check Valve and Rubber Elbow Vacuum fitting
Thread Starter
Junior Member
Joined: Feb 2018
Posts: 68
Likes: 0
Model: Cherokee(XJ)
Engine: 4.0L I6
Part Solution for HVAC Check Valve and Rubber Elbow Vacuum fitting
Here is a really good thread about the vacuum leak I was experiencing:
https://www.cherokeeforum.com/f2/ven...r-load-184800/
Fortunately, my A/C was still blowing through the proper vents, but my fuel trims suggested a leak as my LTFT would change quite a bit and jump around.
Turns out, not only was my HVAC check valve broken, but the elbow at the intake manifold was loose and roached.
I took a chance and ordered MOPAR 55037567AC (RockAuto), used the elbow and check valve off the end and it's a perfect fit. FT's are now solid and aren't going lean when braking and going rich when driving.
https://www.cherokeeforum.com/f2/ven...r-load-184800/
Fortunately, my A/C was still blowing through the proper vents, but my fuel trims suggested a leak as my LTFT would change quite a bit and jump around.
Turns out, not only was my HVAC check valve broken, but the elbow at the intake manifold was loose and roached.
I took a chance and ordered MOPAR 55037567AC (RockAuto), used the elbow and check valve off the end and it's a perfect fit. FT's are now solid and aren't going lean when braking and going rich when driving.
Thread
Thread Starter
Forum
Replies
Last Post
brifle
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
33
Mar 11, 2020 08:03 PM
TheGreatGazoo
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
6
Aug 10, 2015 08:03 AM
huntingman2706217
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
34
Dec 4, 2011 06:47 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)