EMERGENCY! I pulled a vacuum line while changing cap and cannot find??

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Feb 20, 2008 | 06:14 AM

#31

Baggins

Thread Starter

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Joined: Jul 2005

Posts: 99

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Quote:

Originally Posted by 96_4wdr

all the 4L and 3L Ford engines i've looked at had at least one plug on the vac. distribution tree.
in fact these are an often overlooked point of vacuum leak, high heat damage area, rubber plug breaks down and is almost impossible to see especially on an Aerostar.....................

Good Morning,

Well all things continue to be fine, and as you have pointed out about being overlooked, I am now wondering about some "quirky" things that had been going and could be attributed to a vacuum leak.

I just hated moving so many older hoses and wires around (things can be kind of brittle after 15 years) worried that I would create even more problems.

The big test, is that today Momma will be driving it, so if anything goes wrong, including but not limited to, tires spinning in the snow, she will be convinced that I have not yet fixed it.

Thanks again
Dan

Feb 20, 2008 | 07:46 PM

#32

xlt4wd90

Lead Driver

Joined: Sep 2003

Posts: 7,015

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From: SoCal

My van would sometimes "cough" or backfire through the intake if I do not hold down the starter long enough for the engine to catch. The first time it did this, it blew one of the plugs off the vacuum tree, causing poor idling and a CEL. Of course it's impossible to find the plug when this happens. I now loop a hose between two of those nipples on the vacuum tree. One end is tight, and the other end is a little loose. If I get another bad start and the engine coughs again, it will blow off the loose end of the hose. The engine will again run rough. I then just put the hose back onto the tree, and all would be fine again.