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Fully agree with marclar. I have multiple 2nd gen LX escorts, but none of mine had come with cruise control - so I dont know where the vacuum pickoff for the cruise c unit was located. I have added a vacuum gauge to a couple of mine - and was glad to have a spare vacuum plug to replace with my vacuum gauge 1/8" p.t. connection. I suppose ii could have been a vacuum pickoff to a non-standard evap emissions unit. The OEM units had a vacuum line connected to the bottom of the throttle body, which was a 'ported' vacuum source. There should also be a vacuum line from the top of the intake manifold back to the items on the firewall, which have do do with making the EGR valve operate.

Take car of that vacuum line going to the brake booster. Its not just a hose; it has a one-way valve in it, barely visible as a very slight bulge in the hose.

I wanted to collect a car made the year I was born, but alas, I was born in 1944 - when detroit/flnt wasnt making passenger cars.
 
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