[Poppy]

Many times one will be told to check for a vacuum leak. It is often that a vacuum leak causes a P0171 or P0174 code. This post has pictures of under the hood vacuum lines for my 1998 '98 windstar 3.8 engine. Hopefully this will help you to locate them when checking for a leak.

Here are tips for checking for vacuum leaks.

 

[TMWillia]

My engine is slightly different. I don't have the vacuum lines running over by the A/c. Thank you though.

 

[Dominick]

Thanks Poppy I can never find that Pic.

 

[D.Acker]

I just want to add that if you have a 3.8L Windstar with the PCV Tube pictured in pic #3 and are getting 0171 and\or 0174 check that first. I've replaced 2 in the past year because the rubber elbows\boots at either end have cracked and broken causing vacuum leaks. It's an easy place to start, easy part to replace, and less that $20 at NAPA.

Note the first one (original) lasted approx 130k, I'm hoping the replacement going to crap after about a year and half was a fluke.

I would imagine that PCV tube was used on other years\models so check it out.

 

[D.Acker]

Quick update, here is a picture of the PCV tube I was referencing.

Here you can see how badly the elbow\boot had cracked.

 

[opsuper3]

Poppy, yadunitagin. I had to have my transmission rebuilt and it came home with the dreaded p017x's. The vacuum lines seem to have been put back at random and a length of hose had been added. "It came in that way..." These pictures will come in handy!!!

 

[MontanaRick]

Many times one will be told to check for a vacuum leak. It is often that a vacuum leak causes a P0171 or P0174 code. This post has pictures of under the hood vacuum lines for my 1998 '98 windstar 3.8 engine. Hopefully this will help you to locate them when checking for a leak.

Here are tips for checking for vacuum leaks.


View attachment 99

View attachment 100

View attachment 101

View attachment 102

View attachment 103

View attachment 104

View attachment 105

View attachment 106

...
Poppy, et al:
What a find! Great work and much appreciated your sharing pictures of rather frustrating detective work. As a result, I have joined the Ford Forum Online since I am a longtime Ford guy. Cheers