1985 lincoln town car cfi. What is this valve called and what does it do.... It seems stuck....it is on the drivers side exhaust manifold before the cat....
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That closes off that side of the exhaust during engine warm-up. Forces it to go through the intake manifold and get it hot quicker. Not a big deal if it is stuck open. Just takes longer to run nice. I believe vacuum pulls the plunger in to close it off. That makes me think it is stuck open.sigpic
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